CBS CORP
PREM14A, 1999-10-07
TELEVISION BROADCASTING STATIONS
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<PAGE>

              Preliminary Proxy Statement--Subject to Completion

                           SCHEDULE 14A INFORMATION

  Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of
                                     1934

Filed by the Registrant [X]

Filed by a Party other than the Registrant [_]

Check the appropriate box:

                                          [_]Confidential, for Use of the
[X]Preliminary Proxy Statement               Commission Only (as Permitted by
                                             Rule 14a-6(e)(2))

[_]Definitive Proxy Statement

[_]Definitive Additional Materials

[_]Soliciting Material Pursuant to (S)240.14a-11(c) or (S)240.14a-12


                                CBS Corporation
             -----------------------------------------------------
               (Name of Registrant as Specified In Its Charter)


             -----------------------------------------------------
   (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

[_]No fee required.

[X]Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

  (1) Title of each class of securities to which transaction applies: common
      stock, par value $1.00 per share, of CBS Corporation.

  (2) Aggregate number of securities to which transaction applies:
      826,492,158, which is the sum of (i) the number of shares of CBS
      Corporation common stock, par value $1.00 per share ("CBS Common
      Stock") outstanding on August 31, 1999, (ii) the number of shares of
      CBS Common Stock issuable pursuant to outstanding stock options through
      the date the merger is expected to be consummated, and (iii) the number
      of shares of CBS Common Stock otherwise expected to be issued prior to
      the date the merger is expected to be consummated.

  (3) Per unit price or other underlying value of transaction computed
      pursuant to Exchange ActRule 0-11 (Set forth the amount on which the
      filing fee is calculated and state how it was determined): THE FILING
      FEE OF $7,677,286.00 WAS CALCULATED PURSUANT TO EXCHANGE ACT RULE 0-
      11(c) (1) BY MULTIPLYING 1/50TH OF 1% BY THE VALUE OF CBS COMMON STOCK
      TO BE RECEIVED BY VIACOM INC. IN THE TRANSACTION. THE VALUE OF CBS
      COMMON STOCK WAS DETERMINED TO BE $46.445 IN ACCORDANCE WITH EXCHANGE
      ACT RULE 0-11(a) (4) BASED ON THE AVERAGE HIGH AND LOW PRICES OF CBS
      COMMON STOCK AS REPORTED ON THE NEW YORK STOCK EXCHANGE TRANSACTIONS
      TAPE ON SEPTEMBER 30, 1999.

  (4) Proposed maximum aggregate value of transaction: $38,386,428,278.00

  (5) Total fee paid: $7,677,286.00

[_]Fee paid previously with preliminary materials.

[X]Check box if any part of the fee is offset as provided by Exchange Act Rule
   0-11(a)(2) and identify the filing for which the offsetting fee was paid
   previously. Identify the previous filing by registration statement number,
   or the Form or Schedule and the date of its filing.

  (1) Amount Previously Paid: $10,671,428.00

  (2) Form, Schedule or Registration Statement No.: Form S-4

  (3) Filing Party: VIACOM INC.

  (4) Date Filed: October 7, 1999
<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

                                     [LOGO]

                                CBS CORPORATION
                              51 WEST 52nd STREET
                           NEW YORK, NEW YORK  10019

                                                           October . , 1999

Dear CBS Shareholder,

     You are cordially invited to attend a special meeting of shareholders of
CBS Corporation to be held on . , . , 1999 at . , New York, New York, commencing
at . a.m., eastern standard time.

     At the special meeting, you will be asked to consider and vote upon a
proposal to adopt the Agreement and Plan of Merger, dated as of September 6,
1999, between CBS and Viacom Inc., which provides for the merger of CBS and
Viacom. Under the terms of the merger agreement, each issued and outstanding
share of CBS common stock will be converted into the right to receive 1.085
shares of Viacom non-voting Class B common stock. Both Viacom's Class A and
Class B common stock and CBS' common stock are listed and traded on the New York
Stock Exchange.

     The merger agreement advances the vision we share with Viacom of building
the preeminent global media and entertainment firm.  The combination of our
companies, our powerful brands and our highly complementary businesses will
create a company uniquely qualified to capitalize on new opportunities
domestically and around the world.

     The Board of Directors of CBS has determined that the merger is in the best
interests of CBS, has unanimously approved the merger and the merger agreement
and unanimously recommends that shareholders vote to adopt the merger agreement.

     Your participation in the special meeting, in person or by proxy, is
important.  Even if you anticipate attending in person, we urge you to mark,
sign and return the enclosed proxy card promptly in the enclosed postage-paid
envelope to ensure that your shares of CBS common stock will be represented at
the special meeting.  If you do attend in person, you will be entitled to vote
your shares in person.
<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

     The joint proxy statement/prospectus that accompanies this letter contains
information about Viacom and CBS and describes in detail the merger and certain
related matters.  Attached to the joint proxy statement/prospectus is a copy of
the merger agreement, related agreements and other important information.

     Thank you, and we look forward to seeing you at the special meeting.

                             Very truly yours,

David T. McLaughlin                               Mel Karmazin
Chairman of the Board Officer                     President and Chief Executive
                                                  Officer

     For a discussion of risk factors which you should consider in evaluating
the merger, see "Risk Factors" beginning on page . .

- -------------------------------------------------------------------------------
Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of the securities to be issued in the
merger or determined whether this joint proxy statement/prospectus is truthful
or complete. Any representation to the contrary is a criminal offense. The
information in this preliminary joint proxy statement/prospectus is not complete
and may be changed. This preliminary joint proxy statement/prospectus is not an
offer to sell any securities and we are not soliciting offers to buy in any
jurisdiction where the offer or sale would be illegal.
- -------------------------------------------------------------------------------
     This joint proxy statement/prospectus is dated . , 1999, and is first being
mailed to shareholders on or about . , 1999.


<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

                                     [LOGO]

                                CBS CORPORATION
                             51 WEST 52/nd/ STREET
                           NEW YORK, NEW YORK  10019

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                              To Be Held . , 1999

To the Shareholders of CBS:

     A special meeting of shareholders of CBS Corporation, a Pennsylvania
corporation, will be held on . , 1999 at . a.m., eastern standard time, at . ,
New York, New York to consider and vote upon a proposal to adopt the Agreement
and Plan of Merger, dated as of September 6, 1999, between CBS and Viacom Inc.,
a Delaware corporation, a copy of which is attached as Annex A to the joint
proxy statement/prospectus that accompanies this notice.  The merger agreement
provides for the merger of CBS with and into Viacom.  If the merger agreement is
adopted and the merger is consummated each issued and outstanding share of CBS
common stock, par value $1.00 per share, will be converted into the right to
receive 1.085 shares of Viacom non-voting Class B common stock, par value $.01
per share.

     Holders of record of CBS common stock at the close of business on . , 1999,
will be entitled to vote at the special meeting or any adjournments or
postponements of the special meeting.

     The Board of Directors of CBS has determined that the merger is in the best
interests of CBS, has unanimously approved the merger and the merger agreement
and unanimously recommends that shareholders vote to adopt the merger agreement.

     Detailed information concerning the merger, the merger agreement, related
agreements and other related matters is contained in the attached joint proxy
statement/prospectus and its annexes.  Please read this information carefully.

     The vote of each CBS shareholder is important.  We urge you to mark, sign
and return your proxy card promptly in the enclosed postage-paid envelope to
ensure that your shares of CBS common stock will be represented at the special
meeting.  If you attend the special meeting in person, you will be entitled to
vote your shares in person.

     If you plan to attend the special meeting, please keep the admission ticket
that is attached to your proxy card, and also check the appropriate box on your
proxy card.  Shareholders who own shares through banks or brokers and who plan
to attend must send a written notification, along with proof of ownership (such
as a bank or brokerage firm account statement), to the Secretary's Office,
<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

CBS Corporation, 51 West 52/nd/ Street, New York, New York 10019.  The names of
those shareholders indicating they plan to attend will be placed on an admission
list held at the entrance to the meeting. Admission tickets will not be mailed
in advance of the meeting.

                                    On behalf of the Board of Directors,



                                    Angeline C. Straka
                                    Secretary
                                    New York, New York

                            YOUR VOTE IS IMPORTANT.
               PLEASE COMPLETE, SIGN, DATE AND RETURN YOUR PROXY.

                     HOLDERS OF CBS COMMON STOCK SHOULD NOT
                SEND STOCK CERTIFICATES WITH THEIR PROXY CARDS.
<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                   Page
                                                                                   ----
<S>                                                                                <C>
QUESTIONS AND ANSWERS ABOUT THE MERGER.............................................  1

SUMMARY............................................................................  7
     The Companies.................................................................  7
     Terms of the Merger; What Shareholders Will Receive in the Merger.............  8
     Corporate Governance..........................................................  8
     Ownership of Viacom Following the Merger......................................  8
     Reasons for the Merger........................................................  9
     Purposes of the Special Meetings..............................................  7
     Our Recommendations to Shareholders...........................................  9
     Date, Time and Place of Each Special Meeting..................................  9
     Shareholders Entitled to Vote; Vote Required; Voting Agreement................  9
     Interests of Directors and Executive Officers of Viacom and CBS............... 10
     Fairness Opinions of Financial Advisors....................................... 10
     The Merger.................................................................... 10
     Viacom Summary Historical Financial Data...................................... 14
     CBS Summary Historical Financial Data......................................... 15
     Summary Unaudited Viacom/CBS Pro Forma Combined Financial Information......... 17
     Unaudited Viacom/CBS Comparative Per Share Data............................... 18
     Comparative Market Prices and Dividends....................................... 20

RISK FACTORS....................................................................... 22
     Risks Relating to the Merger.................................................. 22
     Risks Relating to the Combined Company........................................ 25

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS......................... 30

UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION....................... 31
     Unaudited Viacom/CBS Pro Forma Combined Condensed Financial Information....... 31
     Unaudited CBS/King World Pro Forma Combined Condensed Financial Information... 41


THE SHAREHOLDERS' MEETINGS......................................................... 49
     Date, Times and Places........................................................ 49
     Matters to Be Considered at the Shareholders' Meetings........................ 49
     Record Date; Shareholders Entitled to Vote; Quorum............................ 49
     Votes Required................................................................ 50
     Submission of Proxies......................................................... 50
     Revocability of Proxies....................................................... 50
     Solicitation of Proxies....................................................... 51
</TABLE>
<PAGE>

             PRELIMINARY PROXY STATEMENT -- SUBJECT TO COMPLETION
             ----------------------------------------------------

<TABLE>
<CAPTION>
                                                                                            Page
                                                                                            ----
<S>                                                                                         <C>
THE MERGER.................................................................................  52
     Background to the Merger..............................................................  52
     Reasons for the Merger and Board Recommendations......................................  55
     Opinions of Financial Advisors........................................................  60
     Directors, Management and Corporate Governance of the Combined Company................  77
     Accounting Treatment..................................................................  81
     Federal Income Tax Consequences.......................................................  81
     Merger Consideration..................................................................  83
     Conversion of Shares; Procedures for Exchange of Certificates; Fractional Shares......  83
     Litigation............................................................................  84
     Effective Time of the Merger..........................................................  84
     Federal Securities Laws Consequences..................................................  84
     Stock Exchange Quotation..............................................................  84
     Viacom's Board of Directors After the Merger..........................................  85
     Dissenters' and Appraisal Rights......................................................  85
     Delisting and Deregistration of CBS Common Stock......................................  85

THE MERGER AGREEMENT AND RELATED AGREEMENTS................................................  86
     The Merger Agreement..................................................................  86
     The Voting Agreement..................................................................  93
     The Stockholder Agreement.............................................................  94

INTERESTS OF CERTAIN PERSONS IN THE MERGER.................................................  95
     Viacom................................................................................  95
     CBS...................................................................................  98

THE COMPANIES.............................................................................. 100
     Viacom's Business..................................................................... 100
     CBS' Business......................................................................... 102

REGULATORY MATTERS AND THIRD-PARTY APPROVALS............................................... 104
     Antitrust............................................................................. 104
     Federal Regulation of Television and Radio Broadcasting............................... 104
     Other Regulations, Legislation and Recent Developments Affecting Broadcast Stations... 108
     Internet.............................................................................. 110

DESCRIPTION OF VIACOM CAPITAL STOCK FOLLOWING THE MERGER................................... 111
     Viacom Class A Common Stock........................................................... 111
     Viacom Class B Common Stock........................................................... 111
     Voting and Other Rights of Viacom Common Stock........................................ 111
     Viacom Preferred Stock................................................................ 112

COMPARISON OF RIGHTS OF HOLDERS OF VIACOM COMMON STOCK AND CBS COMMON STOCK................ 114

SHAREHOLDER PROPOSALS...................................................................... 115

LEGAL MATTERS.............................................................................. 115

EXPERTS.................................................................................... 115

WHERE YOU CAN FIND MORE INFORMATION AND INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE.... 116
     Viacom................................................................................ 117
     CBS................................................................................... 117

ANNEXES
     Annex A   Agreement and Plan of Merger
     Annex B   Restated Certificate of Incorporation
     Annex C   By-laws
     Annex D   Voting Agreement
     Annex E   Stockholder Agreement
     Annex F   Sumner Redstone's Employment Agreement
     Annex G   Mel Karmazin's Employment Agreement
     Annex H   Opinion of Morgan Stanley Dean Witter & Co
     Annex I   Opinion of Evercore Group Inc.
     Annex J   Comparison of Viacom and CBS Shareholders Rights
</TABLE>
                                       ii




<PAGE>

                     QUESTIONS AND ANSWERS ABOUT THE MERGER



Q:   Why are the two companies proposing to merge?



A:   Viacom and CBS believe that the merger advances the vision we share of
     building the preeminent global media and entertainment firm.  The
     combination of our companies, our powerful brands and our highly
     complementary businesses will create a company uniquely qualified to
     capitalize on new opportunities domestically and around the world.



     To review the reasons for the merger in  greater detail, see pages .
     through . and . through ..



Q:   What will I receive in the merger?



A:   If the merger is approved, CBS will merge with and into Viacom, which will
     be the surviving corporation.



     Viacom Shareholders: You will retain the shares of Viacom common stock you
     currently own.



     CBS Shareholders: You will be entitled to receive 1.085 shares of Viacom
     non-voting Class B common stock in exchange for each share of CBS common
     stock you own. Viacom will not issue fractional shares.  Instead, you will
     receive a payment equal to the market value of the fractional share.
<PAGE>

     For example:



        . If you currently own 1,000 shares of CBS common stock, then after the
          merger you will be entitled to receive 1,085 shares of Viacom non-
          voting Class B common stock.



        . If you currently own 100 shares of CBS common stock, then after the
          merger you will be entitled to receive 108 shares of Viacom non-voting
          Class B common stock and a check for the market value of the 0.5
          fractional share of Viacom non-voting Class B common stock.



Q:   As a shareholder, how will the merger affect me?



A:   Viacom Shareholders: After the merger, each share of Viacom common stock
     that you own will represent a smaller ownership percentage of a
     significantly larger company.



     CBS Shareholders: After the merger, you will own shares of a combined
     company that will own the assets of both Viacom and CBS.  The name of the
     combined

                                       2
<PAGE>

     company will be Viacom Inc. The shares of Viacom non-voting Class B common
     stock that you will receive in exchange for your CBS common stock are non-
     voting shares. All of the Viacom voting rights are held by the holders of
     Viacom Class A common stock. A majority of the Viacom Class A common stock
     is held by National Amusements, Inc. which, in turn, is controlled by
     Sumner Redstone, the Chairman and Chief Executive Officer of Viacom.



Q:   Who will manage Viacom after the merger?



A:   Following the merger, the Board of Directors of Viacom will be expanded
     from ten to 18 directors.  The eight additional directors will initially be
     selected from and designated by the Board of Directors of CBS and vacancies
     in this group will be filled during the initial three-year term by
     independent directors designated by the remaining CBS directors.



     Mr. Redstone will continue to serve as Chairman and Chief Executive Officer
     of Viacom and will be responsible, in consultation with the President and
     Chief Operating Officer, for corporate policy and strategy.



     Mel Karmazin, the current President and Chief Executive Officer of CBS,
     will serve as President and Chief Operating Officer of the combined
     company, will report directly to the CEO and consult with the CEO on all
     major decisions and will have responsibility for the supervision,
     coordination and management of the combined company's business.



     Mr. Karmazin, as President and COO, will be entitled to manage the combined
     company's business, subject to the ability of the board of directors of the
     combined company to take action with the approval of at least 14 directors.
     However, in a number of areas the President and COO may not act without the
     approval of, and the combined company's board may act by, a majority of the
     directors.



     The governance arrangements described above will be in effect for a period
     of three years from the closing of the merger, unless 14 of the 18
     directors determine to modify these arrangements or Mr. Karmazin is not the
     COO or CEO of the combined company.



     The governing structure of the combined company during this three year
     period is an important part of

                                       3
<PAGE>

     the merger. We recommend that you read the complete explanation of this
     structure on pages . through . carefully, as well as the complete text of
     the proposed new Restated Certificate of Incorporation attached as Annex B
     to this joint proxy statement/prospectus.



Q:   What am I being asked to vote upon?



A:   Viacom Class A Shareholders:  You are being asked to vote for the adoption
     of the merger agreement.  The Board of Directors of Viacom has declared
     that the merger agreement is advisable and has unanimously approved the
     merger agreement and unanimously recommends that you vote in favor of the
     adoption of the merger agreement.



     A majority of the Viacom Class A common stock is held by National
     Amusements which, in turn, is controlled by Mr. Redstone.  National
     Amusements has entered into a voting agreement with CBS pursuant to which
     it has agreed to vote to adopt the merger agreement. Accordingly, it is
     assured that the required Viacom shareholder approval on this matter will
     be obtained.



     CBS Shareholders:  You are being asked to vote for the adoption of the
     merger agreement.  The Board of Directors of CBS has determined that the
     merger is in the best interests of CBS, has unanimously approved the merger
     and the merger agreement and unanimously recommends that CBS shareholders
     vote in favor of the adoption of the merger agreement.



Q:   What do I need to do now?



A:   Viacom Class A Shareholders:  After carefully reading and considering the
     information contained in this joint proxy statement/prospectus, indicate on
     the enclosed proxy card how you want to vote, and sign and submit it in the
     enclosed return envelope as soon as possible so that your shares may be
     represented at the special meeting.  If you sign and submit your proxy card
     but do not indicate how you want to vote, your proxy will be counted as a
     vote in favor of adoption of the merger.  If you do not vote or you
     abstain, it will have the effect of a vote against adoption of the merger
     agreement.



     CBS Shareholders:  After carefully reading and considering the information
     contained in this joint proxy statement/prospectus, indicate on the
     enclosed proxy card how you want to vote, and sign and submit it in the
     enclosed return envelope as soon as possible so that your shares may be
     represented at the special meeting.  If you sign and submit your proxy card
     but do not indicate how you want to vote, your shares will be voted in
     favor of the adoption of the merger agreement.  If you do not vote or you
     abstain, it will have no effect on whether the proposal is passed.



Q:   When are the special meetings?



A:   The special meeting for Viacom shareholders will take place on ., 1999 and
     for CBS shareholders on ., 1999. You may attend your special meeting and
     vote your shares in person, rather than signing and submitting your proxy
     card, even if you have previously submitted your proxy card.

                                       4
<PAGE>

Q:   If my shares are held in the name of my broker, will my broker vote my
     shares for me?



A:   Your broker will vote your shares only if you provide instructions on how
     to vote.  You should instruct your broker to vote your shares according to
     your directions. Without instructions, your shares will not be voted.



Q:   Can I change my vote after I have submitted my signed proxy card?



A:   You can change your vote at any time before your proxy is voted at the
     special meeting.  You can do this in one of the following three ways:



        . First, you can send a written notice stating that you would like to
          revoke your proxy to the appropriate company at the address indicated
          below.



        . Second, you can complete and submit a new proxy card to the
          appropriate company at the address indicated below.



        . Third, you can attend the special meeting and vote in person.  Simply
          attending the meeting, however, will not revoke your proxy; you must
          vote at the special meeting.  If you have instructed a broker to vote
          your shares, you must follow directions received from your broker to
          change your vote.



Q:   Should I send in my stock certificates now?



A:   Viacom Shareholders:  No. You will keep the stock certificates you
     currently own.



     CBS Shareholders:  No.  After the merger is completed, Viacom will appoint
     an exchange agent to coordinate the exchange of your shares of CBS common
     stock for shares of Viacom non-voting Class B common stock.  The exchange
     agent will send you written instructions on how to exchange your stock
     certificates.



Q:   When do you expect the merger to be completed?



A:   We are working to complete the merger as soon as possible.  In addition to
     shareholder approvals, we must also obtain regulatory approvals and satisfy
     other conditions set forth in the merger agreement.  We hope to complete
     the merger in the first half of 2000.



Q:   What are the tax consequences of the merger to me?



A:   Viacom Shareholders: There will be no tax consequences to you as a result
     of the merger.



     CBS Shareholders:  The exchange of CBS common stock for Viacom non-voting
     Class B common stock will be tax-free for federal income tax purposes.
     However, you will have to pay taxes on the payments received for fractional
     shares.  We recommend that you read the complete explanation of the tax
     consequences on pages . through . carefully.



Q:   Who can help answer my questions?



A:   If you would like additional copies of this joint proxy
     statement/prospectus,

                                       5
<PAGE>

     or if you have questions about the merger, you should contact:



                              VIACOM SHAREHOLDERS:
                                  Viacom Inc.
                                 1515 Broadway
                                 53/rd/ Floor
                           New York, New York  10036
                         Attention:  Investor Relations
                         Phone Number:  (212) 258-6700



                               CBS SHAREHOLDERS:
                                CBS Corporation
                             40 West 57/th/ Street
                            New York, New York 10019
                         Attention:  Investor Relations
                         Phone Number:  (212) 314-9209

                                       6
<PAGE>

                                    SUMMARY



     This summary highlights selected information from this joint proxy
statement/prospectus, and may not contain all of the information that is
important to you.  To understand the merger fully and for a complete description
of the legal terms of the merger, you should read carefully this entire joint
proxy statement/prospectus and the documents to which we have referred you.  See
"Where You Can Find More Information" on page ..  The merger agreement is
attached as Annex A to this joint proxy statement/prospectus. We encourage you
to read the merger agreement, as it is the legal document that governs the
merger.



The Companies



Viacom Inc.
1515 Broadway
New York, NY  10036
(212) 258-6000



     Viacom Inc. is a diversified entertainment company with operations in six
segments:  (1) Networks, (2) Entertainment, (3) Video, (4) Parks, (5) Publishing
and (6) Online.  The Networks segment operates MTV: Music Television/(R)/,
Showtime/(R)/, Nickelodeon/(R)//Nick at Nite/(R)/, VH1 Music First/(R)/ and TV
Land/(R)/, among other program services. The Entertainment segment, which
includes Paramount Pictures/(R)/, Paramount Television/(R)/, Paramount Stations
Group and Spelling Entertainment Group Inc., produces and distributes theatrical
motion pictures and television programming and operates or programs 19 broadcast
television stations. The Video segment consists of an approximately 80% interest
in Blockbuster Inc. (NYSE: BBI) which operates and franchises Blockbuster
Video/(R)/ stores worldwide. The Parks segment, through Paramount Parks/(R)/,
owns and operates five theme parks and a themed attraction in the U.S. and
Canada. The Publishing segment publishes and distributes consumer books and
related multimedia products under such imprints as Simon & Schuster/(R)/. The
Online segment provides online music and children destinations featuring
entertainment, information, community tools and e-commerce.



CBS Corporation
51 West 52nd Street
New York, NY  10019
(212) 975-4321



     CBS is one of the largest radio and television broadcasters in the United
States.  CBS operates its business through its Television, Cable and Infinity
segments.  The Television segment consists of CBS' 15 owned and operated
television stations and the CBS television network, which includes CBS' Internet
businesses.  The Cable segment includes CBS' cable networks, consisting of The
Nashville Network, Country Music Television and two regional sports networks.
The Infinity segment corresponds to Infinity Broadcasting Corporation (NYSE:
INF), which conducts CBS' radio and outdoor advertising business.



     CBS' Internet businesses include its operation of the Internet sites
CBS.com and Country.com, as well as its investments in SportsLine USA, Inc.,
MarketWatch.com, Inc. and other Internet businesses.



     CBS has entered into definitive agreements to acquire King World
Productions, Inc., the distributor of a number of shows, including "The Oprah
Winfrey Show", and, through Infinity, Outdoor Systems, Inc., the largest outdoor
advertising company in North America.  CBS has also entered into an agreement to
acquire television broadcast

                                       7
<PAGE>

station KTVT-TV Dallas-Fort Worth, Texas. CBS believes that these transactions
will be completed by the end of 1999.



Terms of the Merger; What Shareholders Will Receive in the Merger



     CBS will be merged with and into Viacom.  Viacom will be the surviving
corporation.  As a result of the merger, each holder of CBS common stock will be
entitled to receive from Viacom 1.085 shares of Viacom non-voting Class B common
stock in exchange for each share of CBS common stock.  Viacom Class B common
stock is non-voting stock; all Viacom voting rights will be held by the holders
of Viacom Class A common stock.  A majority of the Viacom Class A common stock
is held by National Amusements, Inc. which, in turn, is controlled by Mr.
Redstone.



Corporate Governance



     Following the merger, the Board of Directors of Viacom will be expanded
from ten to 18 directors.  The eight additional directors will initially be
selected from and designated by the Board of Directors of CBS and vacancies in
this group will be filled during the initial three-year term by independent
directors designated by the remaining CBS directors.



     Mr. Redstone will continue to serve as Chairman and Chief Executive Officer
of Viacom and will be responsible, in consultation with the President and Chief
Operating Officer, for corporate policy and strategy.



     Mr. Karmazin, the current President and Chief Executive Officer of CBS,
will serve as President and Chief Operating Officer of the combined company,
will report directly to the CEO and consult with the CEO on all major decisions
and will have responsibility for the supervision, coordination and management of
the combined company's business.



     Mr. Karmazin, as President and COO, will be entitled to manage the combined
company's business, subject to the ability of the board of directors of the
combined company to take action with the approval of at least 14 directors.
However, in a number of areas the President and COO may not act without the
approval of, and the combined company's board may act by, a majority of the
directors.



     The governance arrangements described above will be in effect for a period
of three years from the closing of the merger, unless 14 of the 18 directors
determine to modify these arrangements or Mr. Karmazin is not the COO or CEO of
the combined company.



     The governing structure of the combined company during this three-year
period is an important part of the merger.  We recommend that you read the
complete explanation of this structure on pages . through . carefully, as well
as the complete text of the proposed new Restated Certificate of Incorporation
attached as Annex B to this joint proxy statement/prospectus.



Ownership of Viacom Following the Merger



     We anticipate that CBS shareholders will receive approximately 812 million
shares of Viacom non-voting Class B common stock in the merger.  Based on that
number, immediately following the merger, the former CBS shareholders will hold
an aggregate equity interest in Viacom of approximately 54%.  The Viacom voting
Class A common stock will continue to be controlled by National Amusements
which, in turn, is controlled by Mr. Redstone.

                                       8
<PAGE>

Reasons for the Merger

     Viacom and CBS believe that the merger advances the vision we share of
building the preeminent global media and entertainment firm.  The combination of
our companies, our powerful brands and our highly complementary businesses
will create a company uniquely qualified to capitalize on new opportunities
domestically and around the world.

     To review the reasons for the merger in greater detail, see pages .
through . and . through ..

Purposes of the Special Meetings

     At the Viacom special meeting, the Viacom shareholders will be asked to
vote to adopt the merger agreement.

     At the CBS special meeting, the CBS shareholders will be asked to vote to
adopt the merger agreement.

Our Recommendations to Shareholders

To the Viacom Shareholders:

     The Viacom Board has declared that the merger agreement is advisable and
has unanimously approved the merger agreement and unanimously recommends that
you vote "for" the proposal to adopt the merger agreement.

To the CBS Shareholders:

     The CBS Board has determined that the merger is in the best interests of
CBS, has unanimously approved the merger and the merger agreement and
unanimously recommends that you vote "for" the adoption of the merger agreement.

Date, Time and Place of Each Special Meeting

     The Viacom special meeting will be held at ., New York, New York at . a.m.,
eastern standard time, on ., 1999.

     The CBS special meeting will be held at ., New York, New York at . a.m.,
eastern standard time, on ., 1999.

Shareholders Entitled to Vote; Vote Required; Voting Agreement

     Viacom Class A Shareholders:  Only shareholders of record at the close of
business on the record date of ., 1999 will be entitled to vote at the special
meeting.  On the record date, there were . shares of Viacom Class A common stock
outstanding. You will have one vote at the special meeting for each share of
Viacom Class A common stock that you owned on the record date. A vote in favor
of the adoption of the merger agreement by a majority of the shares of Viacom
Class A common stock outstanding on the record date is required to adopt the
merger agreement.  A majority of the Viacom Class A common stock is owned by
National Amusements, which, in turn, is controlled by Mr. Redstone.  National
Amusements has entered into a voting agreement with CBS pursuant to which it has
agreed to vote to adopt the merger agreement.  Accordingly, it is assured that
Viacom shareholder approval of the adoption of the merger agreement will be
obtained.

     CBS Shareholders:  Only shareholders of record at the close of business on
the record date of ., 1999 will be entitled to vote at the special meeting.  On
the record date, there were . shares of CBS common stock outstanding.  You will
have one vote at the special meeting for each share of CBS common stock that you
owned on the record date.  A

                                       9
<PAGE>

majority of votes cast by all shareholders entitled to vote at the CBS special
meeting is required to adopt the merger agreement. If you sign and submit your
proxy but do not indicate how you want to vote, your proxy will be counted as a
vote in favor of adoption of the merger agreement. If you do not vote or you
abstain, it will have no effect on whether the proposal is passed.



Interests of Directors and Executive Officers of Viacom and CBS



     A number of directors and executive officers of CBS and Viacom have
interests in the merger as employees and/or directors that are different from,
or in addition to, your interests as a shareholder.  If the merger is completed,
certain directors and members of the existing senior management of each of CBS
and Viacom will be designated as members of the initial Board of Directors and
senior management of Viacom after the merger. Mr. Redstone and Mr. Karmazin have
entered into employment agreements providing for their employment as Chairman
and CEO and President and COO, respectively, following the merger.  Also,
certain indemnification arrangements for existing directors and officers of CBS
and Viacom will be continued.



Fairness Opinions of Financial Advisors



     In deciding to approve the merger, each Board considered the opinion of its
financial advisor as to the fairness of the merger to its shareholders from a
financial point of view.  Viacom received an opinion from its financial advisor,
Morgan Stanley Dean Witter & Co., and CBS received an opinion from its financial
advisor, Evercore Group Inc., an affiliate of Evercore Partners Inc.  These
opinions are attached as Annexes H and I, respectively, to this joint proxy
statement/prospectus.  The opinions are not a recommendation as to how you
should vote your shares.  We encourage you to read these opinions carefully.



The Merger



Conditions to the Merger



     We will complete the merger only if various conditions are satisfied or
waived, including the following:



   . Viacom and CBS shareholders vote to adopt the merger agreement;



   . no law or court order prohibits the merger or makes the merger illegal;



   . the registration statement of which this joint proxy statement/prospectus
     forms a part has been declared effective and no stop order suspending its
     effectiveness is in effect;



   . the shares of Viacom Class B common stock to be issued to shareholders of
     CBS in the merger have been authorized for listing by the NYSE, subject to
     official notice of issuance;



   . Viacom and CBS obtain all regulatory approvals necessary to complete the
     merger;



   . each of Viacom and CBS has certified to the other that its representations
     and warranties are true and correct except as would not have a material
     adverse effect and that its material obligations under the merger agreement
     have been complied with in all material respects; and

                                       10
<PAGE>

   . Viacom and CBS have each obtained an opinion from their respective tax
     counsel that the merger will be tax-free.



No Solicitation of Competing Transactions



     The merger agreement prohibits CBS from soliciting any proposal from, or
providing information to or negotiating with, another party for the sale or
transfer of more than 35% of the voting power or assets of CBS.



     However, until the CBS shareholders adopt the merger agreement, CBS may
consider an unsolicited proposal for a competing transaction from another party
which CBS' Board of Directors determines in good faith reasonably can be
expected to result in a superior proposal, and CBS may furnish information to
that party.  A superior proposal is a proposal to acquire more than 50% of the
voting power or all or substantially all of the assets of CBS for consideration
which the CBS Board determines in good faith is more favorable than that to be
received by CBS shareholders in the merger. CBS must notify Viacom if it begins
to negotiate a competing transaction.



Termination of the Merger Agreement



     The Boards of Directors of both our companies can jointly agree to
terminate the merger agreement at any time without completing the merger.  In
addition, the merger agreement may also be terminated:



   . by either company, if the merger is not completed by August 31, 2000;



   . by either company, if the shareholders of CBS do not approve the merger;



   . by either company, if a governmental authority has issued a final and
     nonappealable order permanently prohibiting the merger;



   . by either company, if the other company breaches any of the
     representations or warranties it made in the merger agreement in a manner
     so as to have a material adverse effect on that company, or the other
     company materially fails to comply with any of the material obligations it
     has under the merger agreement, in either case such that the conditions to
     closing relating to the representations and warranties or covenants would
     not be satisfied; or



   . by CBS, if prior to the adoption of the merger agreement by the CBS
     shareholders CBS gives notice to Viacom of the existence of a superior
     proposal.



Termination Fees



     CBS is required to pay Viacom a termination fee of $1 billion if:



   . (1) Viacom or CBS terminates the merger agreement because the CBS
     shareholders fail to adopt the merger agreement at the CBS special meeting,
     (2) a competing proposal to acquire more than 50% of the voting power or
     assets of CBS has been made public at or prior to the failure to adopt the
     merger agreement and (3) within 12 months after termination, a binding
     agreement to enter into a competing transaction is entered into by CBS or a
     competing transaction is consummated; or



   . CBS terminates the merger agreement because, prior to the adoption of the
     merger agreement by CBS shareholders, CBS gives notice to

                                       11
<PAGE>

     Viacom of the existence of a superior proposal.



Regulatory Approvals



     Under U.S. antitrust laws, we may not complete the merger until we have
notified the Antitrust Division of the Department of Justice and the Federal
Trade Commission of the merger and filed the necessary report forms and until a
required waiting period has ended.  Viacom made its notification on September
20, 1999 and CBS made its notification on September 23, 1999.  However, the
Antitrust Division of the Department of Justice and the Federal Trade Commission
continue to have the authority to challenge the merger on antitrust grounds
before and after the merger is completed.



     Under U.S. federal communications laws, the merger will result in a
transfer of control to Viacom of licenses held by CBS, and, therefore, the
merger requires the prior review and approval of the Federal Communications
Commission.  Both Viacom and CBS will request the required approval in an
application to the FCC.  The FCC will not permit such applications to be filed
until November 16, 1999, because the application will request authority to own
two television stations in certain markets.  This application will be subject to
comments by the public, and any decision may be further reviewed or reconsidered
by the FCC or a court.  In order to comply with applicable law and to secure the
approval of the FCC, Viacom, CBS or both may need to divest some or all of their
respective interests in a number of radio and television licenses as well as
some or all of Viacom's interest in United Paramount Network.  Further, Viacom,
CBS or both may be required to divest additional broadcast stations in the event
rules recently adopted by the FCC that relax ownership restrictions fail to
become effective, or are stayed, reconsidered or modified by the FCC or a court.



     Both companies are required to make filings with or obtain approvals from
certain other domestic and international regulatory authorities in connection
with the merger.



     We cannot predict whether we will obtain all required regulatory approvals
to complete the merger, or whether any approvals will include conditions that
would be detrimental to CBS or Viacom.



No Appraisal Rights



     Neither Viacom shareholders nor CBS shareholders have a right to an
appraisal of the value of their shares in connection with the merger.



Certain Federal Income Tax Consequences



     Viacom tax counsel and CBS tax counsel will each provide an opinion that
CBS shareholders will not be taxed as a result of the exchange of CBS common
stock for Viacom Class B common stock in the merger unless and only to the
extent they receive a payment for fractional shares.  Receipt of these opinions
is a condition to the closing of the merger.



     Viacom shareholders will not be taxed as a result of the merger.



Accounting Treatment



     The merger will be accounted for under the purchase method of accounting in
accordance with generally accepted accounting principles.  Accordingly, the cost
to acquire CBS will be allocated to the assets acquired and liabilities assumed
based on their fair values, with any excess being treated as goodwill and
amortized over its estimated useful life.



Risk Factors

                                       12
<PAGE>

     There are risk factors relating to the merger and the combined company that
both Viacom and CBS shareholders should consider in evaluating how to vote at
the special meeting. These risk factors include the following:



     .  fixed exchange ratio may result in lower value of merger consideration;



     .  the merger is subject to review and approval by the Federal
        Communications Commission and the combined company may be required to
        divest certain assets;



     .  antitrust regulatory agencies may oppose the merger or impose conditions
        on the merger;



     .  Viacom and CBS may encounter difficulties in integrating operations and
        may not achieve strategic and other benefits;



     .  there will be a controlling shareholder;



     .  the combined company's corporate governance structure will be unusual;



     .  the split-off of Blockbuster from Viacom may not occur;



     .  the combined company will operate in a business environment that is
        rapidly changing due to technological and other factors;



     .  expenditures by advertisers tend to be seasonal and cyclical;



     .  acceptance of the combined company's programming by the public
        generally;



     .  dependence upon affiliation agreements;



     .  the broadcast industry is subject to extensive federal regulation; and



     .  the combined company has environmental, asbestos and other contingent
        liabilities.



Surrender of Stock Certificates



     Following the merger, Viacom will appoint an exchange agent who will
instruct the CBS shareholders on the procedure to follow to surrender their
stock certificates of CBS common stock in exchange for stock certificates of
Viacom non-voting Class B common stock.  Upon surrender of the stock
certificates, CBS shareholders will be entitled to receive a payment for the
value of any fractional shares.



                               *       *       *

                                       13
<PAGE>

                   Viacom Summary Historical Financial Data

     The summary consolidated financial data presented below have been derived
from, and should be read together with, Viacom's audited consolidated financial
statements and the accompanying notes included in Viacom's annual report on Form
10-K for the year ended December 31, 1998 and the unaudited interim consolidated
financial statements and the accompanying notes included in Viacom's quarterly
report on Form 10-Q for the quarterly period ended June 30, 1999, both of which
are incorporated by reference into this joint proxy statement/prospectus.  The
historical financial data presented below includes the results of Paramount
Communications Inc. after its acquisition by Viacom on March 11, 1994 and the
results of Blockbuster Entertainment Corporation after its acquisition by Viacom
on September 29, 1994.



                          Statement of Operations Data
                    (in millions, except per share amounts)



<TABLE>
<CAPTION>
                                       Six Months Ended
                                           June 30,                   Year Ended December 31,
                                       -----------------  ------------------------------------------------
                                        1999      1998      1998       1997     1996     1995      1994
                                       -------  --------  ---------  --------  -------  -------  ---------
<S>                                    <C>      <C>       <C>        <C>       <C>      <C>      <C>
                                           (Unaudited)

Revenues..............................  $5,954   $5,465    $12,096    $10,685  $ 9,684  $ 8,700   $ 4,486
Operating income......................  $  560   $   48    $   752    $   685  $ 1,197  $ 1,247   $   354
Earnings (loss) from continuing
  operations..........................  $  128   $ (220)   $   (44)   $   374  $   152  $    88   $    19
Net earnings (loss)...................  $  104   $ (279)   $  (122)   $   794  $ 1,248  $   223   $    90
Net earnings (loss) attributable to
  common stock........................  $   92   $ (309)   $  (150)   $   734  $ 1,188  $   163   $    15
Earnings (loss) per common share:
Basic:
  Earnings (loss) from continuing
   operations.........................  $  .17   $ (.35)   $  (.10)   $   .44  $   .13  $   .04   $  (.14)
  Net earnings (loss).................  $  .13   $ (.43)   $  (.21)   $  1.04  $  1.63  $   .22   $   .04
Diluted:
  Earnings (loss) from continuing
   operations........................   $  .16   $ (.35)   $  (.10)   $   .44  $   .13  $   .04   $  (.13)
  Net earnings (loss)................   $  .13   $ (.43)   $  (.21)   $  1.04  $  1.62  $   .22   $   .03
</TABLE>


                                                        Balance Sheet Data
                                                           (in millions)

<TABLE>
<CAPTION>
                                                                                     As of December 31,
                                                                       ----------------------------------------------
                                                        As of
                                                     June 30, 1999      1998    1997     1996      1995       1994
                                                     -------------    -------  ------   -------   -------   --------
                                                      (Unaudited)
<S>                                                      <C>          <C>      <C>      <C>       <C>       <C>
Total assets...........................................  $23,803      $23,613  $28,289  $28,834   $28,991   $28,274
Total long-term debt, net of current portion...........  $ 6,424      $ 3,813  $ 7,423  $ 9,856   $10,712   $10,402
Shareholders' equity...................................  $11,215      $12,050  $13,384  $12,587   $12,094   $11,792
</TABLE>

                                       14
<PAGE>

                     CBS Summary Historical Financial Data



          The selected consolidated historical financial data presented below
have been derived from, and should be read together with, the CBS audited
consolidated financial statements and the accompanying notes included in CBS'
Annual Report on Form 10-K for the year ended December 31, 1998 and the
unaudited interim consolidated financial statements and the accompanying notes
included in CBS' quarterly report on Form 10-Q for the six months ended June 30,
1999, which are incorporated by reference in this joint proxy
statement/prospectus.  The historical financial data presented below includes
the results of CBS Radio Inc., formerly American Radio Systems Corporation,
after its acquisition by CBS on June 4, 1998, the results of The Nashville
Network and Country Music Television, Gaylord Entertainment Company's two major
cable networks, after their acquisition by CBS on September 30, 1997, the
results of Infinity Media Corporation, formerly known as Infinity Broadcasting
Corporation, after its acquisition by CBS on December 31, 1996 and the results
of CBS Inc. after its acquisition by CBS, formerly Westinghouse Electric
Corporation, on November 24, 1995.



                          Statement of Operations Data
                    (in millions, except per share amounts)

<TABLE>
<CAPTION>
                                                  Six Months
                                               Ended June 30,           Year Ended December 31,
                                             ----------------  ------------------------------------------
                                              1999     1998     1998     1997     1996     1995     1994
                                             -------  -------  -------  -------  -------  -------  ------
                                               (Unaudited)
<S>                                          <C>      <C>      <C>      <C>      <C>      <C>      <C>
Revenues.................................... $3,446   $3,433   $6,805   $5,367   $4,143   $1,074   $ 744
Operating profit............................    412      263      482      253       54      160     151
Interest expense............................    (97)    (160)    (370)    (386)    (401)    (184)    (26)
Income (loss) from Continuing Operations
 before income taxes and minority interest..    309      120      155      (59)    (292)     128      (6)
Income tax (expense) benefit................   (176)     (95)    (161)     (73)      71      (75)      1
Income (loss) from Continuing Operations....    103       23      (12)    (131)    (221)      47     (10)
Income (loss) from Discontinued
 Operations.................................    384       --       --      680      409      (57)     58
Extraordinary item, net of income taxes.....     (5)      --       (9)      --      (93)      --      --
Net income (loss)...........................    482       23      (21)     549       95      (10)     48

Basic earnings (loss) per common share:
Continuing Operations....................... $  .15   $  .03   $ (.02)  $ (.24)  $ (.67)  $ (.09)  $(.27)
Discontinued Operations.....................    .55       --       --     1.08     1.02     (.16)    .16
Extraordinary item..........................   (.01)      --     (.01)      --     (.23)      --      --
                                             ------   ------   ------   ------   ------   ------   -----
Basic earnings (loss) per common share...... $  .69   $  .03   $ (.03)  $  .84   $  .12   $ (.25)  $(.11)
                                             ======   ======   ======   ======   ======   ======   =====

Diluted earnings (loss) per common share:
Continuing Operations....................... $  .15   $  .03   $ (.02)  $ (.24)  $ (.67)  $ (.09)  $(.27)
</TABLE>



                                       15

<PAGE>

<TABLE>
<CAPTION>

                                                Six Months
                                               Ended June 30,          Year Ended December 31,
                                             ----------------  ------------------------------------------
                                              1999     1998     1998     1997     1996     1995     1994
                                             -------  -------  -------  -------  -------  -------  ------
                                                (Unaudited)
<S>                                          <C>      <C>      <C>      <C>      <C>      <C>      <C>
Discontinued Operations....................     .54       --       --     1.08     1.02     (.16)    .16
Extraordinary item.........................    (.01)      --     (.01)      --     (.23)      --      --
                                             ------   ------   ------   ------   ------   ------   -----
Diluted earnings (loss) per
  common share.............................  $  .68   $  .03   $ (.03)  $  .84   $  .12   $ (.25)  $(.11)
                                             ======   ======   ======   ======   ======   ======   =====
Dividends per common share.................  $   --   $  .05   $  .05   $  .20   $  .20   $  .20   $ .20
                                             ======   ======   ======   ======   ======   ======   =====
</TABLE>

                               Balance Sheet Data
                                 (in millions)

<TABLE>
<CAPTION>

                                            As of                    As of December 31,
                                          June 30,     ------------------------------------------------
                                            1999       1998      1997       1996      1995      1994
                                         ---------    ------   -------     ------    ------    -------
<S>                                      <C>          <C>       <C>       <C>       <C>       <C>
                                         (Unaudited)

Total assets--Continuing Operations......   $20,358    $20,139   $16,503   $15,406   $10,391   $ 2,524
Total assets--Discontinued Operations....       861      1,919     4,101     5,710     8,157     9,273
                                            -------    -------   -------   -------   -------   -------

Total assets..............................  $21,219    $22,058   $20,604   $21,116   $18,548   $11,797
                                            =======    =======   =======   =======   =======   =======

Long-term debt--Continuing Operations.....  $ 2,111    $ 2,506   $ 3,236   $ 5,147   $ 7,222   $ 1,865
Long-term debt--Discontinued Operations...      408        382       440       419       161       589
                                            -------    -------   -------   -------   -------   -------

Total long-term debt......................  $ 2,519    $ 2,888   $ 3,676   $ 5,566   $ 7,383   $ 2,454
                                            =======    =======   =======   =======   =======   =======

Total debt--Continuing Operations.........  $ 2,190    $ 2,665   $ 3,387   $ 5,635   $ 7,840   $ 2,471
Total debt--Discontinued Operations.......      429        428       543       439       528     1,266
                                            -------    -------   -------   -------   -------   -------

Total debt................................  $ 2,619    $ 3,093   $ 3,930   $ 6,074   $ 8,368   $ 3,737
                                            =======    =======   =======   =======   =======   =======

Shareholders' equity......................  $ 9,695    $ 9,054   $ 8,080   $ 5,731   $ 1,453   $ 1,789
                                            =======    =======   =======   =======   =======   =======
</TABLE>

                                       16
<PAGE>

     Summary Unaudited Viacom/CBS Pro Forma Combined Financial Information

     The following summary unaudited pro forma combined financial information is
derived from and should be read together with the information provided in the
section, "Unaudited Viacom/CBS Pro Forma Combined Condensed Financial
Information" and the notes thereto. The summary unaudited pro forma combined
financial information is based upon the historical financial statements of
Viacom, adjusted for the initial public offering of Blockbuster and other
related transactions, and the historical financial statements of CBS, adjusted
for the acquisition of American Radio and the pending acquisitions of King World
and Outdoor Systems, Inc.  The unaudited pro forma combined condensed statement
of operations data for the six months ended June 30, 1999 and the year ended
December 31, 1998 is presented as if the merger of Viacom and CBS and all other
aforementioned transactions had occurred on January 1, 1998.  The unaudited pro
forma combined balance sheet data at June 30, 1999 is presented as if the merger
of Viacom and CBS and all other aforementioned transactions had occurred on June
30, 1999.

     The summary unaudited pro forma combined financial data is for illustrative
purposes only and does not necessarily indicate the operating results or
financial position that would have been achieved had the merger of Viacom and
CBS and all other aforementioned transactions been completed as of the dates
indicated or of the results that may be obtained in the future. In addition, the
data does not reflect synergies that might be achieved from combining these
operations.



           Unaudited Pro Forma Combined Statement of Operations Data
                    (in millions, except per share amounts)

<TABLE>
<CAPTION>
                                                                         Six Months
                                                                            Ended           Year Ended
                                                                        June 30, 1999   December 31, 1998
                                                                       --------------  ------------------
<S>                                                                    <C>             <C>
Revenues.............................................................        $10,144             $20,457
Operating income.....................................................        $   720             $   695
Earnings (loss) from continuing operations before income taxes
           and minority interest.....................................        $   307             $  (365)
Loss from continuing operations......................................        $  (148)            $  (774)
Net loss from continuing operations attributable to common stock.....        $  (161)            $  (801)
Basic and diluted loss from continuing operations per share..........        $  (.11)            $  (.53)
Weighted average shares outstanding:
           Basic.....................................................           1,505               1,521
           Diluted...................................................           1,505               1,521
</TABLE>


                Unaudited Pro Forma Combined Balance Sheet Data
                                 (in millions)

<TABLE>
<CAPTION>
                                                           At June 30, 1999
                                                           ----------------

        <S>                                                     <C>
        Total assets..........................................  $77,467
        Total long-term debt, net of current portion..........  $ 9,740
        Shareholders' equity..................................  $47,486
</TABLE>

                                       17
<PAGE>

             Unaudited Viacom/CBS Comparative Per Share Data

  The following tables present the Viacom and CBS historical and pro forma
combined and CBS pro forma equivalent comparative per share data for the six
months ended or at June 30, 1999 and the twelve months ended or at December 31,
1998.

<TABLE>
<CAPTION>
                                                                  Pro Forma Combined As        CBS
Six Months Ended                      Viacom                        Adjusted For Other      Pro Forma
or At June 30, 1999                 Historical   CBS Historical       Viacom Events       Equivalent(3)
- -------------------                 ----------   --------------   ---------------------   -------------
<S>                                 <C>          <C>              <C>                     <C>
Earnings (loss) per common share
 from continuing operations(1):
     Basic.........................     $  .17           $  .15                 $  (.11)      $ (.12)
     Diluted.......................        .16              .15                    (.11)        (.12)
Book value per common share(2):
     Basic.........................     $16.29           $13.96                 $ 31.65       $34.34
     Diluted.......................      15.98            13.64                   31.38        34.04
Cash dividends per common share....         --               --                      --           --
<CAPTION>
                                                                  Pro Forma Combined As        CBS
Twelve Months Ended                   Viacom                        Adjusted For Other      Pro Forma
or At December 31, 1998             Historical   CBS Historical       Viacom Events       Equivalent(3)
- -----------------------             ----------   --------------   ---------------------   -------------
<S>                                 <C>          <C>              <C>                     <C>
Earnings (loss) per common share
 from continuing operations(1):
     Basic.........................     $ (.10)          $ (.02)                $  (.53)      $ (.57)
     Diluted.......................       (.10)            (.02)                   (.53)        (.57)
Book value per common share(2):
     Basic.........................     $17.34           $13.12                 $ 32.06       $34.79
     Diluted.......................      17.07            12.85                   31.83        34.54
Cash dividends per common share....         --           $  .05                      --           --
</TABLE>
(1)  The weighted average common shares outstanding used in calculating pro
     forma combined basic and diluted earnings (loss) from continuing operations
     per common share, as adjusted for all transactions, are calculated assuming
     that the estimated number of shares of Viacom common stock to be issued in
     the merger were outstanding from January 1, 1998.  For both periods
     presented, the weighted average common shares outstanding used in
     calculating pro forma combined diluted earnings (loss) from continuing
     operations per common share do not include the impact of Viacom stock
     options, as they are antidilutive.

(2)  The book value per common share amounts of Viacom and CBS were calculated
     by dividing shareholders' equity by the number of common shares outstanding
     at the end of the period.  The common shares outstanding used in
     calculating basic pro forma combined book value per share include
     approximately 688 million and approximately 695 million of Viacom common
     shares outstanding at June 30, 1999 and December 31, 1998, respectively,
     plus approximately 812 million shares representing the estimated number of
     common shares to be issued in the merger.  (See Note 2 to the Unaudited
     Viacom/CBS Pro Forma Combined Condensed Financial Statements.)  The common
     shares outstanding used in calculating diluted pro forma combined book
     value per common share as of June 30, 1999 and December 31, 1998 include
     the Viacom common shares, plus the estimated number of common shares to be
     issued in

                                      18
<PAGE>

     the merger, as well as the dilutive impact of Viacom options to
     purchase shares of common stock, and totaled approximately 1.5 billion for
     both periods.

(3)  CBS pro forma equivalent amounts are calculated by multiplying the
     respective pro forma combined per common share amounts by the exchange
     ratio of 1.085.

                                       19
<PAGE>

                    Comparative Market Prices and Dividends



     Viacom Class A common stock and Class B common stock are listed and traded
on the NYSE under the symbols "VIA" and "VIAB", respectively.  CBS common stock
is listed and traded on the NYSE under the symbol "CBS."

     On February 25, 1999, the Board of Directors of Viacom declared a 2-for-1
common stock split, to be effected in the form of a dividend.  The additional
shares were issued on March 31, 1999 to shareholders of record on March 15,
1999.  All common share and per share amounts have been adjusted to reflect the
stock split for all periods presented.

     The following tables set forth, for the calendar periods indicated, the per
share range of high and low sales prices for Viacom Class A common stock, Viacom
non-voting Class B common stock and CBS common stock as reported on the NYSE or
by the American Stock Exchange, together with the dividend declaration history
of Viacom and CBS.  Only shares of Viacom non-voting Class B common stock will
be issued to shareholders of CBS in the merger in exchange for their shares of
CBS common stock.



<TABLE>
<CAPTION>
                                              Viacom Class A             Viacom Class B
                                             Common Stock/(1)/          Common Stock/(1)/
                                            --------------------    --------------------------
                                              High        Low         High              Low
                                            --------    --------    --------         ---------
<S>                                         <C>         <C>         <C>               <C>
1997
 1st Quarter..............................  $ 18 9/16   $ 16        $ 18 15/16        $ 16
 2nd Quarter..............................    17 23/32    12 5/8      18                12 5/8
 3rd Quarter..............................    17 3/8      13 3/4      17 9/16           13 5/8
 4th Quarter..............................    20 7/8      13          21 1/8            13 1/4

1998
 1st Quarter..............................  $ 27 1/8    $ 19 15/16  $ 27 17/32        $ 20 1/4
 2nd Quarter..............................    30 1/2      26 1/8      30 5/8            26 13/32
 3rd Quarter..............................    34 11/16    24 5/8      35                24 3/4
 4th Quarter..............................    36 29/32    25 7/16     37 1/8            25 163/512

1999
 1st Quarter..............................  $ 45 1/2    $ 35 5/16   $ 45 15/16        $ 35 3/8
 2nd Quarter/(2)/.........................    48 3/4      36 11/16    49 3/16           36 5/8
 3rd Quarter..............................    49 5/8      38 7/16     48 3/4            38 9/16
 4th Quarter (through October 4, 1999)....    45          42 5/16     44 7/16           41 7/16
</TABLE>

- ---------------------------
(1) Viacom has not declared cash dividends on its Class A or Class B common
    stock and has no present intention of doing so.

(2) As of April 8, 1999, Viacom Class A and Class B common stock ceased trading
    on the American Stock Exchange and commenced trading on the NYSE.

                                       20
<PAGE>

<TABLE>
<CAPTION>
                                                      CBS Common Stock
                                            --------------------------------------
                                                                      Dividends
                                               High        Low      per Share/(1)/
                                            ---------    -------    --------------
<S>                                         <C>        <C>         <C>
1997
 1st Quarter.............................   $  20 3/8   $  16 3/4       $ .05
 2nd Quarter.............................      23 13/16    16             .05
 3rd Quarter.............................      27 15/16    22 3/4         .05
 4th Quarter.............................      32 1/16     23 3/8         .05

1998
 1st Quarter.............................   $  34 3/16  $  26 3/4       $ .05
 2nd Quarter.............................      36 5/8      29 11/16        --
 3rd Quarter.............................      35 1/2      21 7/8          --
 4th Quarter.............................      33 1/8      18              --

1999
 1st Quarter.............................   $  41 5/8   $  31 11/16        --
 2nd Quarter.............................      47 5/16     39 3/16         --
 3rd Quarter.............................      51 15/16    43 5/8          --
 4th Quarter (through October 4, 1999)...      48 1/2      45 3/4          --
</TABLE>



- -------------------
(1) CBS suspended payments of dividends after it commenced its stock buy-back
    program in March 1998.

     On September 3, 1999, the last trading day prior to the announcement of the
execution of the merger agreement, the last reported closing sale prices per
share of Viacom Class A common stock and Class B common stock were $45 5/16 and
$45 1/16, respectively, and the last reported sale price per share of CBS common
stock was $48 15/16.  On ., 1999, the last trading day prior to the printing of
this joint proxy statement/prospectus, the last reported sale prices per share
of Viacom Class A common stock and Class B common stock were $. and $.,
respectively, and the last reported sale price per share of CBS common stock was
$   .    .

     The market prices of shares of Viacom Class A common stock, Viacom Class B
common stock  and CBS common stock are subject to fluctuations.  As a result,
Viacom and CBS shareholders are urged to obtain current market quotations.

     On the record date, there were approximately . holders of record of Viacom
Class A common stock, approximately . holders of record of Viacom Class B common
stock, and approximately . holders of record of CBS common stock.

                                       21
<PAGE>

                                  RISK FACTORS



     You should consider the following risks in deciding whether to adopt the
merger agreement.  These matters should be considered along with the other
information included or incorporated by reference in this joint proxy
statement/prospectus.  We have separated the risks into two groups:



     .    risks relating to the merger; and



     .    risks relating to the combined company.



Risks Relating to the Merger



Fixed Exchange Ratio May Result in Lower Value of Merger Consideration



     Upon completion of the merger, each share of CBS common stock will be
exchanged for 1.085 shares of Viacom non-voting Class B common stock.  This
exchange ratio is fixed and will not be adjusted as a result of any increase or
decrease in the price of either Viacom non-voting Class B common stock or CBS
common stock.  Any change in the price of Viacom non-voting Class B common stock
will affect the value the CBS shareholders receive in the merger.  In addition,
because the merger will be completed only after all the conditions to the merger
are satisfied or waived, including the receipt of regulatory approvals, there is
no way to be sure that the price of Viacom non-voting Class B common stock or
CBS common stock at the time the merger is completed will be the same as their
prices on the date of the special meeting. Changes in the business, operations
or prospects of Viacom or CBS, regulatory considerations, general market and
economic conditions and other factors may affect the prices of Viacom non-voting
Class B common stock, CBS common stock or both.  Many of those factors are
beyond our control.  You are encouraged to obtain current market quotations for
both Viacom non-voting Class B common stock and CBS common stock.



The Merger Is Subject to Review and Approval by the Federal Communications
Commission and the Combined Company May Be Required to Divest Certain Assets



     Approval by the FCC is required for the transfer of control to Viacom of
the television and radio station licenses currently held by CBS.  An application
will be filed requesting such approval, which will be subject to public comment.
FCC approval will be predicated, in part, on the effectiveness of new FCC rules
permitting a single company to hold two television stations in a single market
and upon the effectiveness of modifications to the "one-to-a-market" rule, which
governs the degree of common ownership of television and radio stations in one
market.  The FCC will not accept any such applications until the effective date
of these rules, November 16, 1999, which may delay the approval process.



     The combined company will be required under current law to divest some of
its broadcasting assets in order to receive FCC approval. In particular, the
television stations currently held by both entities together reach more than the
maximum percentage of U.S. television households permitted by the FCC.
Accordingly, in the absence of changes to this so-called "national cap" rule,
the combined company will have to divest a sufficient number of television
stations to reduce the overall audience reach, calculated for FCC purposes, from
approximately 41% to less than 35%.

                                       22
<PAGE>

     The combined company may be required to divest up to an aggregate of 12
radio stations in Los Angeles, Chicago, Dallas, Washington/Baltimore and
Sacramento in order to comply with recently adopted limits on the common
ownership of same-market radio and television stations.



     The combined company would hold licenses for two television stations in
each of six markets -- Philadelphia, Boston, Dallas, Detroit, Miami and
Pittsburgh.  In the event the common ownership of two television stations in
each of these markets does not comply with recently adopted FCC rules permitting
such in-market "duopolies" in certain circumstances, the combined company could
be required to divest a television station in one or more of these markets.  The
combined  company may also be required to divest additional broadcast stations
in the event rules recently adopted by the FCC that relax ownership restrictions
fail to become effective, or are stayed, reconsidered or modified by the agency
or a court.  The combined company may also have to reduce or divest its interest
in the United Paramount Network to comply with rules limiting the common
ownership of certain television networks.  There can be no assurance that the
consummation of any required divestitures could be effected at a fair market
price.



     In order to consummate the merger on an orderly and timely basis and to
avoid a sale that would yield less than a fair market price, Viacom and CBS may
request temporary waivers of FCC rules, apply to place certain assets in trust
or seek other regulatory relief.  There can be no assurance that such waivers or
trust applications would be granted or other relief obtained or that
consummation of the merger will not be delayed pending receipt of FCC approval
of the merger.  Further, there can be no assurance that FCC approval of the
merger will not require further divestitures or impose material conditions
adverse to Viacom or CBS, or that no action will be brought challenging such
approvals or actions, or, if such challenge is made, as to the result thereof.
See "-- Federal Regulation of Television and Radio Broadcasting."



Antitrust Regulatory Agencies May Oppose or Impose Conditions on the Merger



     Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, Viacom and
CBS must file Premerger Notification and Report Forms with the Antitrust
Division of the Department of Justice and the Federal Trade Commission, and a
waiting period must expire or terminate before the merger may be completed.  One
of the agencies will be assigned to review the merger, and prior to the
expiration of the waiting period, the reviewing agency may issue to the parties
a Request for Additional Information and Documentary Material.  The DOJ or the
FTC could take action under the antitrust laws to:



     . enjoin the merger or



     . require divestiture of assets or businesses of Viacom or CBS.



     The initial filings under the HSR Act were made by Viacom and CBS on
September 20, 1999 and September 23, 1999, respectively. We do not know whether
the federal antitrust authorities will permit the HSR Act waiting period to
expire without challenging the merger.  We also do not know whether a third
party will challenge the merger on antitrust grounds or what the result of a
third party challenge might be.

                                       23
<PAGE>

     In addition, it is possible that one or more individual states could
investigate and challenge the merger under either federal law or their own state
law, although states have no notification and waiting period requirements.
Depending on the nature of any of these challenges, and any conditions imposed
as a result, these challenges and conditions could delay completion of the
merger or lessen the anticipated benefits of the merger.



     The merger agreement requires the parties to use their respective best
efforts, and to take all actions necessary, to satisfy the conditions to the
merger, and to do so in a manner designed to obtain all regulatory clearances
and the satisfaction of the conditions as expeditiously as possible.  This
includes agreeing to the sale or other disposition of assets or businesses and
taking all steps necessary to vacate or lift any order, judgment or injunction
that would prohibit or materially delay consummation of the merger.



Viacom and CBS May Encounter Difficulties in Integrating Operations and May Not
Achieve Strategic and Other Benefits



     The merger will require the integration of our two companies and will also
require the integration of companies recently acquired or being acquired by CBS.
The combined companies expect to realize cost savings and other financial and
strategic and operating benefits as a result of the merger.  However, when these
benefits will occur, as well as the extent to which they actually will be
achieved, cannot be predicted with certainty.  The integration of Viacom and CBS
will also require substantial attention from management.  The diversion of
management attention and any difficulties associated with integrating Viacom and
CBS could have a material adverse effect on the revenues, the levels of expenses
and the operating results of the combined company.  See "The Merger--Reasons for
the Merger and Board Recommendations."



There Will Be a Controlling Shareholder



     Immediately after completion of the merger, National Amusements will own
approximately 68% of the voting stock of the combined company.  Mr. Redstone,
who controls National Amusements, will be able to determine the outcome of all
corporate actions requiring shareholder approval except actions that under
Delaware law require a class vote of the Viacom Class B common stock.  However,
in connection with the merger, National Amusements has entered into a
stockholder agreement pursuant to which it has agreed for a three-year period to
ensure, among other things, that eight of the 18 members of the Board of
Directors of the combined company shall be directors of CBS or replacements they
may designate.  In addition, the proposed new Restated Certificate of
Incorporation of Viacom, which will become effective at the time of the merger,
will provide that Board action will require the approval of 14 of the 18
directors of the combined company, except for a number of areas where the
directors of the combined company may act by a majority vote of the Board.  Such
arrangements will be in place for a three-year period unless 14 of 18 directors
determine to modify these arrangements or Mr. Karmazin is not the COO or the CEO
of the combined company.  For a more detailed discussion of the corporate
governance of the combined company, see "The Merger--Directors, Management and
Corporate Governance of the Combined Company."


                                       24
<PAGE>

The Combined Company's Corporate Governance Structure Will Be Unusual

     In the merger agreement, CBS and Viacom have agreed to a variety of
corporate governance arrangements that will differ significantly from the manner
in which the two companies are currently managed.  There can be no assurance
that these arrangements will prove to be a successful model for managing the
combined company.  For a detailed description of the corporate governance
arrangements, see "The Merger--Directors, Management and Corporate Governance of
the Combined Company."



The Split-off of Blockbuster from Viacom May Not Occur



     Viacom has announced that, subject to Viacom Board approval and the receipt
of a supplemental tax ruling from the Internal Revenue Service reflecting the
proposed merger between Viacom and CBS, it may split-off Blockbuster by offering
to exchange all of its shares of Blockbuster for shares of Viacom's common
stock.  The split-off is intended to establish Blockbuster as a stand-alone
entity with objectives separate from those of Viacom's other businesses.  Viacom
believes that the split-off will resolve management, systemic, competitive and
other problems that have arisen from the operation of various different
businesses under a common parent corporation.  For example, the split-off will
resolve perceived conflicts of interest between Blockbuster and Paramount.
These conflicts are perceived both by the movie studio competitors of Paramount
and the video retail competitors of Blockbuster.  In addition, Viacom believes
the split-off will allow Blockbuster to facilitate the expansion of
Blockbuster's business by issuing its stock to make acquisitions.  The split-off
will also allow Blockbuster to modify its compensation structure to provide
incentives to its employees that are more closely linked to its performance.
Viacom has no obligation to effect the split-off either before or after the
merger.  Viacom and CBS cannot give any assurance as to whether or not or when
the split-off will occur or as to the terms of the split-off if it does occur,
or whether or not the split-off, if it does occur, will be tax-free.



Risks Relating to the Combined Company



The Combined Company Will Operate in a Business Environment that Is Rapidly
Changing Due to Technological and Other Factors.



     General.  The combined company will operate in a rapidly changing business
     -------
environment.  There can be no assurance that competitive developments and
technologies will not adversely affect the combined company's future market
share of the audiences and customers for entertainment and leisure-time
activities or of advertising revenue.  In particular, while the amount of
advertising on the Internet is currently small, the Internet is a rapidly
growing competitor for advertising spending and viewership, the full impact of
which cannot be predicted.



     Film and Television Production.  The television and motion picture industry
     ------------------------------
has experienced cycles in which increased costs of talent and other factors have
resulted in higher production costs and increased competition.  In addition,
television and movie producers are indirectly affected by changes in viewership
of broadcast and cable networks, the amount of broadcast time available on local
stations for syndicated television programs and, for movies, the relative
success of different forms of distribution, such as home video, pay television
and network television, each of which have different profitability to producers.
There can be no assurance that developments in these areas will not adversely
affect the profitability of the combined company.

                                       25
<PAGE>

     Television and Cable Television Networks.  The combined company will
     ----------------------------------------
directly compete for viewers in general (and viewers in specific demographic
categories) and for programming with other cable and broadcast television
networks.  The recently expanded availability of digital cable television and
the introduction of direct-to-home satellite distribution has greatly increased
the amount of channel capacity available for new networks, resulting in the
launch of a number of new cable television networks by both our companies and
their competitors. In addition, digital broadcast television, which has recently
become available in major markets, may allow a single television station to
broadcast several channels simultaneously.  Increasing audience fragmentation
could have an adverse effect on advertising revenue and subscription revenues.
Broadcast television has experienced a decline in total audience viewership in
recent years.  Among the major networks, CBS delivers an audience that has an
older demographic.  An older demographic may result in lower revenue for an
advertising spot. There can be no assurance that this audience decline will not
continue or that CBS network programming will appeal to an audience having a
younger demographic.



     Television and Radio Broadcast Stations.  New technologies, such as digital
     ---------------------------------------
radio services, direct-to-home satellite, wireless and wired cable television
and Internet radio and video programming, compete for programming, audiences and
advertising revenues.  Although each of these technologies are different from
traditional broadcasting (for example, satellite-delivered digital radio
services cannot broadcast local advertising or programming), there can be no
assurance that these or other new technologies will not have an adverse effect
on the combined company's business in the future.



     Video.  Videocassette rental competes with other forms of distribution of
     -----
movies, including theatrical distribution, cable, satellite and broadcast
television.  Movie studios make available videocassettes for rental during a
distribution "window" of time which is in advance of, and exclusive against,
distribution through most other forms of non-theatrical movie distribution.
Although the studios have a significant interest in maintaining a viable home
video rental industry, changes in the videocassette exclusive window in relation
to other windows could have an adverse effect upon the video rental business.
In addition, some digital cable providers have begun testing technology designed
to transmit movies on demand with interactive capabilities such as start, stop
and rewind.  This "video-on-demand" technology could have a material adverse
effect on the videocassette rental market if it could be provided profitably at
a reasonable price and if video-on-demand rights were to be provided with a
favorable window by the movie studios.



Expenditures by Advertisers Tend to Be Seasonal and Cyclical



     The combined company will derive a substantial portion of its revenues from
the sale of advertising on its television stations, cable networks, radio
stations and outdoor displays.  Expenditures by advertisers tend to be seasonal
and cyclical, reflecting overall economic conditions as well as budgeting and
buying patterns.  A decline in the economic prospects of advertisers or the
economy in general could alter current or prospective advertisers' spending
priorities or increase the time it takes to close a sale with our advertisers.
This could cause revenues of the combined company from advertisements to decline
significantly in any given period.  In addition, because a substantial portion
of the combined company's revenues will be derived from local advertisers, the
combined company's ability to generate advertising revenues in specific markets
could be adversely affected by local or regional economic downturns.

                                       26
<PAGE>

Acceptance of the Combined Company's Programming by the Public Generally



     Revenues derived from the production and distribution of a feature film,
television series or radio show depend primarily upon its acceptance by the
public, which is difficult to predict.  The commercial success of a feature
film, television series or radio show also depends upon the quality and
acceptance of other competing films, television series or radio shows released
into the marketplace at or near the same time, the availability of alternative
forms of entertainment and leisure time activities, general economic conditions
and other tangible and intangible factors, all of which can change and cannot be
predicted with certainty.  Further, the theatrical success of a feature film and
the audience ratings for a television series are generally key factors in
generating revenues from other distribution channels, such as home video, free
television and premium pay television.



Dependence upon Affiliation Agreements



     Much of the combined company's broadcast network programming will be
provided to its broadcast affiliates pursuant to affiliation agreements of
varying durations and staggered expirations.  The combined company will be
dependent upon the maintenance of affiliation agreements with third-party owned
television stations, and there can be no assurance that such affiliation
agreements will be renewed in the future on terms acceptable to the combined
company.  The loss of a significant number of such affiliation arrangements
could reduce the distribution of the combined company's programming, thereby
adversely affecting the combined company's ability to sell national advertising
time.



     Similarly, the basic cable networks in which the combined company will hold
interests, including MTV, VH1, Nickelodeon, The Nashville Network, Country Music
Television and other cable networks maintain affiliation arrangements that
enable them to reach a large percentage of cable and direct broadcast satellite
(DBS) households across the United States.  Such cable networks also depend on
achieving and maintaining carriage within the most widely distributed cable
programming tiers to maximize their subscriber base and revenues.  The loss of a
significant number of affiliation arrangements on basic programming tiers could
reduce the distribution of such cable networks, thereby adversely affecting such
networks' revenues from subscriber fees and the ability to sell advertising
time.  The combined company's non-advertiser supported pay television networks,
such as Showtime, are similarly dependent for their distribution on the
maintenance of affiliation agreements with cable and DBS distributors on
acceptable terms.  The loss of carriage on cable systems or DBS platforms, or
continued carriage on less favorable terms, could adversely affect such
networks' subscriber fee revenues.



The Broadcast Industry Is Subject to Extensive Federal Regulation



     The television and radio broadcasting industries are subject to regulation
by the FCC under the Communications Act of 1934, as amended.  Approval of the
FCC is required for the issuance or renewal, as well as transfer and assignment
of broadcast station operating licenses.  The combined company will be dependent
upon its ability to maintain broadcasting licenses from the FCC.  License
renewals filed after 1996 customarily are granted for terms of eight years,
absent serious or repeated violations of law.  While broadcast licenses are
typically renewed by the FCC, there can be no

                                       27
<PAGE>

assurance that the licenses for the combined company's stations will be renewed
at their expiration dates or, if renewed, that the renewal terms will be for the
full eight-year periods. The non-renewal or revocation of the FCC licenses held
by the combined company could have a material adverse effect on the operations
of the combined company.



     All of the television stations the combined company will own have been
allocated a digital television, or DTV, channel.  FCC rules require that the
combined company deliver a digitally transmitted signal on these channels by
specified dates, terminate analog signals and return the license to operate an
analog service by 2006, unless specified conditions exist that, in effect,
reflect the public's general inability to receive DTV transmissions in a
particular market.  We are unable to predict the costs or benefits associated
with the operation of DTV stations and networks.  Additionally, the extent to
which cable channels will be required to carry broadcast stations' new digital
channels is an issue that remains pending at the FCC.



     The FCC also generally regulates, among other things, the ownership of
media (including ownership by non-U.S. citizens), broadcast programming and
technical operations.  Further, the U.S. Congress and the FCC currently have
under consideration, and may in the future adopt, new laws, regulations and
policies regarding a wide variety of matters, including technological changes,
which could, directly or indirectly, affect the operations and ownership of the
combined company's broadcast properties.



The Combined Company Has Environmental, Asbestos and Other Contingent
Liabilities



     Primarily as a result of Viacom's mergers with Paramount Communications
(formerly Gulf & Western) and Blockbuster (which owned a controlling interest in
Spelling Entertainment Group Inc., formerly the Charter Company) in 1994 and the
merger of CBS Inc. with Westinghouse Electric Corporation in 1995, the combined
company will have significant environmental liabilities.  Both Paramount and
Westinghouse were diversified, global companies with portfolios including a wide
variety of industrial businesses.  The Charter Company was in various businesses
related to petroleum products.  Viacom and CBS have each retained certain
liabilities, including environmental, and indemnified others under certain
circumstances against liabilities, including environmental, related to
discontinued operations.



     Under federal and state Superfund and other environmental laws, Viacom and
CBS each have been named as a potentially responsible party at numerous sites
located throughout the country.  At many of these sites, Viacom and CBS are
either not responsible parties or their site involvement is very limited or de
minimis.  However, Viacom or CBS, as the case may be, may have varying degrees
of cleanup responsibilities at a number of sites.  Viacom and CBS believe that
any liability incurred for cleanup at these sites will be satisfied over a
number of years, and in many cases, the costs will be shared with other
potentially responsible parties.  These sites include certain sites for which
Viacom or CBS, as the case may be, as part of an agreement for sale, may have
retained obligations for remediation of possible environmental contamination or
may have continuing obligations under applicable environmental laws.

                                       28
<PAGE>

     In addition, CBS and Viacom are parties to various lawsuits and have
received claims relating to their continuing and discontinued operations.
Certain lawsuits and claims, including those related to asbestos liabilities,
seek substantial monetary damages.



          The combined company will have access to insurance in substantial
amounts and management believes it has sufficient reserves. Accordingly, while
there can be no assurance in this regard, the pending or potential litigation,
environmental and other liabilities should not have a material adverse effect on
the financial condition of the combined company.

                                       29
<PAGE>

           CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS



     This document and the documents incorporated by reference into this joint
proxy statement/prospectus contain both historical and forward-looking
statements.  All statements other than statements of historical fact are, or may
be deemed to be, forward-looking statements within the meaning of section 27A of
the Securities Act of 1933 and section 21E of the Securities Exchange Act of
1934.  These forward-looking statements are not based on historical facts, but
rather reflect Viacom's and CBS' current expectations concerning future results
and events.  These forward-looking statements generally can be identified by use
of statements that include phrases such as "believe," "expect," "anticipate,"
"intend," "plan," "foresee," "likely," "will" or other similar words or phrases.
Similarly, statements that describe our objectives, plans or goals are or may be
forward-looking statements.  These forward-looking statements involve known and
unknown risks, uncertainties and other factors which may cause the actual
results, performance or achievements of Viacom or CBS to be different from any
future results, performance and achievements expressed or implied by these
statements.  You should review carefully all information, including the
financial statements and the notes to the financial statements, included or
incorporated by reference into this joint proxy statement/prospectus.



     In addition to the risk factors described in the previous section, the
following important factors could affect future results, causing these results
to differ materially from those expressed in our forward-looking statements:



     .    the timing, impact and other uncertainties related to pending
          acquisitions by CBS or Viacom and future acquisitions and dispositions
          by the combined company;



     .    the ability of the combined company to renew existing programming,
          licensing and distribution agreements and to enter into new
          agreements;



     .    the success of CBS and Viacom and their suppliers and customers in
          achieving year 2000 compliance;



     .    changes in tax requirements, including tax rate changes, new tax laws
          and revised tax law interpretations; and



     .    interest rate fluctuations and other capital market conditions.



     These factors and the risk factors described in the previous section are
not necessarily all of the important factors that could cause actual results to
differ materially from those expressed in any of our forward-looking statements.
Other unknown or unpredictable factors also could have material adverse effects
on our future results.  The forward-looking statements included in this joint
proxy statement/prospectus are made only as of the date of this joint proxy
statement/prospectus and under section 27A of the Securities Act and section 21E
of the Exchange Act we do not have any obligation to publicly update any
forward-looking statements to reflect subsequent events or circumstances.  We
cannot assure you that projected results or events will be achieved.

                                       30
<PAGE>

          UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION



Unaudited Viacom/CBS Pro Forma Combined Condensed Financial Information



General



     The merger will be accounted for by the purchase method of accounting.
Consideration provided by Viacom in this merger includes: approximately $36.7
billion through the issuance of approximately 812 million shares of Viacom non-
voting Class B common stock plus, approximately $833 million of cash
consideration, net of approximately $556 million of deferred taxes, for the
assumed settlement of certain historical CBS stock options and the assumption of
approximately $200 million of CBS stock options by Viacom, both of which were
granted prior to the date of the merger agreement, and approximately $3.5
billion for the assumption of debt. This consideration will be allocated to the
tangible and identifiable intangible assets acquired and liabilities assumed
according to their respective fair values, with the excess purchase
consideration being allocated to goodwill.  The merger is contingent upon, among
other things, regulatory and Viacom and CBS shareholder approval.



     The following unaudited pro forma combined condensed consolidated balance
sheet as of June 30, 1999, is presented as if the merger and the other Viacom
and other CBS transactions described in the notes to the unaudited Viacom/CBS
pro forma combined condensed financial statements had occurred on June 30, 1999.
The unaudited pro forma combined condensed statements of operations for the six
months ended June 30, 1999, and for the year ended December 31, 1998, are
presented as if the merger and the other Viacom and other CBS transactions had
occurred on January 1, 1998. In the opinion of Viacom and CBS management, all
adjustments and/or disclosures necessary for a fair presentation of the pro
forma data have been made. These unaudited pro forma combined condensed
financial statements are presented for illustrative purposes only and are not
necessarily indicative of the operating results or the financial position that
would have been achieved had the merger, or the other Viacom and other CBS
transactions had been consummated as of the dates indicated or of the results
that may be obtained in the future.



     These unaudited pro forma combined condensed financial statements and notes
thereto should be read in conjunction with the unaudited CBS/King World pro
forma combined condensed financial information included herein, and (i) CBS'
consolidated financial statements and the notes thereto as of and for the year
ended December 31, 1998, and Management's Discussion and Analysis included in
CBS' Annual Report on Form 10-K for the year ended December 31, 1998, which is
incorporated by reference in this joint proxy statement/prospectus; (ii) King
World's consolidated financial statements and the notes thereto as of and for
the year ended August 31, 1998, which are included in CBS' Current Report on
Form 8-K filed on or about October 8, 1999 which is incorporated by reference in
this joint proxy statement/prospectus; (iii) CBS' Quarterly Reports on Form 10-Q
for the quarterly periods ended March 31, 1999 and June 30, 1999 which are
incorporated by reference in this joint proxy statement/prospectus; (iv) King
World's condensed consolidated financial statements and notes thereto as of and
for the quarterly period ended May 31, 1999 which are included in CBS' Current
Report on Form 8-K filed on or about October 8, 1999 which is incorporated by
reference in this joint proxy statement/prospectus; (v) Viacom's consolidated
financial statements and the notes thereto as of and for the year ended December
31, 1998, and Management's Discussion and Analysis included in Viacom's Annual
Report on Form 10-K for the year ended December 31, 1998 which is incorporated
by
                                       31
<PAGE>

reference in this joint proxy statement/prospectus; and (vi) Viacom's
consolidated financial statements and the notes thereto as of and for the six-
month period ended June 30, 1999, on Form 10-Q which is incorporated by
reference in this joint proxy statement/prospectus.

                                       32
<PAGE>

                         UNAUDITED VIACOM/CBS PRO FORMA
                        COMBINED CONDENSED BALANCE SHEET
                              AS OF JUNE 30, 1999
                                 (in millions)

<TABLE>
<CAPTION>

                                                                      Pro Forma
                                                          CBS      Adjustments for             Pro Forma    Adjustments
                                            Viacom     Pro Forma     Viacom/CBS                Combined      For Other
                                          Historical    Combined       Merger                 Viacom/CBS   Viacom Events
                                          -----------  ----------      ------                 -----------  --------------


ASSETS:
<S>                                       <C>          <C>         <C>                        <C>          <C>
Cash and cash equivalents................    $   616     $   582    $         (532)/(3)/      $   666         $   ---
Customer receivables, net................      1,577       1,388               ---              2,965             ---
Other current assets.....................      2,622       1,212               484 /(3)/        4,318             ---
                                             -------     -------    --------------            -------     -----------
Total current assets.....................      4,815       3,182               (48)             7,949             ---

Property and equipment, net..............      3,249       3,047               ---              6,296             ---
Goodwill and other intangibles, net......     11,490      23,689            22,594 /(3)/       57,773             ---
Other noncurrent assets..................      4,249       1,592              (387)/(3)/        5,454              (5)/(4)/
                                             -------     -------    --------------            -------     -----------

Total assets.............................    $23,803     $31,510    $       22,159            $77,472     $        (5)
                                             =======     =======    ==============            =======     ===========

LIABILITIES AND
  SHAREHOLDERS' EQUITY:
Current portion of long-term debt........    $   328     $   265   $           ---            $   593   $         ---
Accounts payable, accrued expenses and
  other..................................      3,960       1,880               (72)/(3)/        5,768             ---
                                             -------     -------    --------------            -------     -----------
Total current liabilities................      4,288       2,145               (72)             6,361             ---

Long-term debt...........................      6,424       3,283               470 /(3)/       10,177            (437)/(4)/
Net liabilities of discontinued
   operations............................        ---         985               ---                985             ---
Other noncurrent liabilities.............      1,876       4,336               ---              6,212             ---
                                             -------     -------    --------------            -------     -----------

Total liabilities........................     12,588      10,749               398             23,735            (437)
                                             -------     -------    --------------            -------     -----------

Minority interest in equity of
  consolidated subsidiaries..............        ---       5,589               ---              5,589           1,094/(4)/

Shareholders' equity:
Common stock.............................          7         800                 8 /(2)/           15             ---
                                                                              (800)/(3)/
Additional paid-in capital...............     10,593      14,596            36,725 /(2)/       47,518            (662)/(4)/
                                                                               200 /(2)/
                                                                           (14,596)/(3)/
Common stock held in treasury, at cost...     (1,361)     (1,467)            1,467 /(3)/       (1,361)            ---
Retained earnings........................      2,018       1,910            (1,910)/(3)/        2,018             ---
Accumulated other comprehensive loss.....        (42)       (667)              667 /(3)/          (42)            ---
                                             -------     -------    --------------            -------     -----------

Total shareholders' equity...............     11,215      15,172            21,761             48,148            (662)
                                             -------     -------    --------------            -------     -----------

Total liabilities and
   shareholders' equity..................    $23,803     $31,510    $       22,159            $77,472     $        (5)
                                             =======     =======    ==============            =======     ===========
<CAPTION>
                                              Pro Forma
                                               Combined
                                             As Adjusted
                                              For Other
                                            Viacom Events
                                            --------------


ASSETS:
<S>                                         <C>
Cash and cash equivalents................         $   666
Customer receivables, net................           2,965
Other current assets.....................           4,318
                                                  -------
Total current assets.....................           7,949

Property and equipment, net..............           6,296
Goodwill and other intangibles, net......          57,773
Other noncurrent assets..................           5,449
                                                  -------

Total assets.............................         $77,467
                                                  =======

LIABILITIES AND
  SHAREHOLDERS' EQUITY:
Current portion of long-term debt........         $   593
Accounts payable, accrued expenses and
  other..................................           5,768
                                                  -------
Total current liabilities................           6,361

Long-term debt...........................           9,740
Net liabilities of discontinued
   operations............................             985
Other noncurrent liabilities.............           6,212
                                                  -------

Total liabilities........................          23,298
                                                  -------

Minority interest in equity of
  consolidated subsidiaries..............           6,683

Shareholders' equity:
Common stock.............................              15

Additional paid-in capital...............          46,856


Common stock held in treasury, at cost...          (1,361)
Retained earnings........................           2,018
Accumulated other comprehensive loss.....             (42)
                                                  -------

Total shareholders' equity...............          47,486
                                                  -------

Total liabilities and
   shareholders' equity..................         $77,467
                                                  =======
</TABLE>


                 See accompanying notes to unaudited Viacom/CBS
               pro forma combined condensed financial statements.

                                       33
<PAGE>

                         UNAUDITED VIACOM/CBS PRO FORMA
                  COMBINED CONDENSED STATEMENTS OF OPERATIONS
                    FOR THE SIX MONTHS ENDED JUNE 30, 1999
                    (in millions, except per share amounts)
<TABLE>
<CAPTION>
                                                                           Pro Forma                                    Pro Forma
                                                                          Adjustments                    Adjustments     Combined
                                                               CBS            for          Pro Forma      For Other     as Adjusted
                                                Viacom      Pro Forma      Viacom/CBS       Combined       Viacom        For Other
                                                Historical   Combined        Merger        Viacom/CBS      Events      Viacom Events
                                                ----------   ---------   -----------       ----------      ----------   -----------
<S>                                           <C>          <C>         <C>               <C>              <C>          <C>
Revenues.....................................    $ 5,954     $ 4,190   $       ---            $10,144        $  ---        $10,144
Operating expenses...........................     (3,887)     (2,442)          ---             (6,329)          ---         (6,329)
Selling, general and administrative..........     (1,110)       (660)          ---             (1,770)          ---         (1,770)
Depreciation and amortization................       (397)       (561)         (282)/(3)/       (1,240)          ---         (1,240)
Residual costs of discontinued businesses....        ---         (85)          ---                (85)          ---            (85)
                                                 -------     -------   -----------            -------       -------        -------
Operating income (loss)......................        560         442          (282)               720           ---            720
Other income and expense, net................        (29)         (4)          ---                (33)          ---            (33)
Interest expense, net........................       (200)       (143)          (38)/(3)/         (381)            1/(4)/      (380)
                                                 -------     -------   -----------            -------       -------        ------
Earnings from continuing operations before
 income taxes................................        331         295          (320)              306              1            307
Income tax (expense) benefit.................       (202)       (239)           15/(5)/         (426)           ---           (426)
Minority interest............................         (1)        (32)          ---               (33)             4/(4)/       (29)
                                                 -------     -------   -----------            -------       -------        ------
Earnings (loss) from continuing operations...        128          24          (305)             (153)             5           (148)
Cumulative convertible preferred stock
 dividend requirement and premium on
 repurchase of preferred stock...............        (13)        ---           ---               (13)           ---            (13)
                                                 -------     -------   -----------            -------       -------        ------
Net earnings (loss) from continuing
 operations attributable to common stock.....    $   115     $    24   $      (305)          $  (166)      $      5        $  (161)
                                                 =======     =======   ===========           =======       ========        =======
Earnings (loss) from continuing operations
 per common share:
 Basic.......................................       $.17                                       $(.11)                        $(.11)
 Diluted.....................................       $.16                                       $(.11)                        $(.11)

Weighted average shares outstanding:
 Basic.......................................        693                       812             1,505                         1,505
 Diluted.....................................        708                       812             1,505                         1,505
</TABLE>
                 See accompanying notes to unaudited Viacom/CBS
               pro forma combined condensed financial statements.

                                       34
<PAGE>

                         UNAUDITED VIACOM/CBS PRO FORMA
                  COMBINED CONDENSED STATEMENTS OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1998
                    (in millions, except per share amounts)



<TABLE>
<CAPTION>
                                                                   Pro Forma                                  Pro Forma
                                                                  Adjustments                                  Combined
                                                        CBS           for              Pro Forma    Adjustments    As Adjusted
                                          Viacom     Pro Forma    Viacom/CBS           Combined      For Other      For Other
                                        Historical    Combined      Merger            Viacom/CBS   Viacom Events  Viacom Events
                                        ----------   ---------   ------------        -----------  -------------  -------------
<S>                                     <C>          <C>         <C>                 <C>          <C>            <C>
Revenues...............................  $12,096     $ 8,361     $     ---           $ 20,457   $         ---       $ 20,457
Operating expenses.....................   (8,506)     (5,242)          ---            (13,748)            ---        (13,748)
Selling, general and administrative....   (2,061)     (1,335)          ---             (3,396)            ---         (3,396)
Depreciation and amortization..........     (777)     (1,113)         (565)/(3)/       (2,455)            ---         (2,455)
Residual costs of discontinued
   businesses..........................      ---        (163)          ---               (163)            ---           (163)
                                         -------     -------     ---------           --------       ---------       --------
Operating income (loss)................      752         508          (565)               695             ---            695
Other income and expense, net..........      (57)         38           ---                (19)            ---            (19)
Interest expense, net..................     (599)       (363)          (85)/(3)/       (1,047)              6/(4)/    (1,041)
                                         -------     -------     ---------           --------       ---------       --------
Earnings (loss) from continuing
 operations before income taxes........       96         183          (650)              (371)              6           (365)
Income tax (expense) benefit...........     (139)       (320)           34 /(5)/         (425)             (2)/(5)/     (427)
Minority interest......................       (1)        (35)          ---                (36)             54/(4)/        18
                                         -------     -------     ---------           --------       ---------       --------
Earnings (loss) from continuing
 operations............................      (44)       (172)         (616)              (832)             58           (774)

Cumulative convertible preferred stock
 dividend requirement and discount on
 repurchase of preferred stock.........      (27)        ---           ---                (27)            ---            (27)
                                         -------     -------     ---------           --------       ---------       --------
Net earnings (loss) from continuing
 operations attributable to common stock $   (71)    $  (172)    $    (616)          $   (859)      $      58        $  (801)
                                         =======     =======     =========           ========       =========       ========
Loss from continuing operations per
 common share:
   Basic...............................    $(.10)                                       $(.56)                         $(.53)
   Diluted.............................    $(.10)                                       $(.56)                         $(.53)

Weighted average shares outstanding:
   Basic...............................      709                       812              1,521                          1,521
   Diluted.............................      709                       812              1,521                          1,521
</TABLE>

                See accompanying notes to unaudited Viacom/CBS
              pro forma combined condensed financial statements.

                                      35
<PAGE>

                    NOTES TO UNAUDITED VIACOM/CBS PRO FORMA
                    COMBINED CONDENSED FINANCIAL STATEMENTS

                 (tables in millions, except per share amounts)


(1)  Basis of Presentation

     The purchase method of accounting has been used in the preparation of the
accompanying unaudited pro forma combined condensed financial statements.  Under
this method of accounting, the purchase consideration is allocated to tangible
and identifiable intangible assets acquired and liabilities assumed based on
their respective fair values, with the excess purchase consideration being
allocated to goodwill.  For purposes of the unaudited pro forma combined
condensed financial statements, the preliminary fair values of  CBS' assets and
liabilities were estimated by CBS and Viacom management. The final allocation of
the purchase price will be determined after the completion of the merger and
will be based on appraisals and a comprehensive final evaluation of tangible and
identifiable intangible assets acquired (including their estimated useful lives)
and liabilities assumed.

(2)  Consideration

     Pursuant to the merger agreement, CBS shareholders will receive 1.085
shares of Viacom non-voting Class B common stock for each CBS share issued and
outstanding at the completion of the merger. The total number of CBS shares
issued and outstanding during the period subsequent to the merger announcement
but prior to its completion is not anticipated to fluctuate from the ordinary
course. For purposes of the unaudited pro forma combined condensed financial
statements, the $45.225 per share value of Viacom non-voting Class B common
stock to be issued was calculated based on its average market price per share
from September 2, 1999 through September 9, 1999.


<TABLE>
<S>                                                                            <C>
Total estimated CBS common shares outstanding (including approximately 57.3
  shares to be issued to King World shareholders).............................    748.6
Exchange Ratio................................................................    1.085
                                                                                -------
Estimated Viacom Class B common shares to be issued...........................    812.2
                                                                                =======
Purchase Consideration:
Estimated value of Viacom Class B common stock to be issued
  (812.2 shares at $45.225 per share):
   Common stock, $.01 par value...............................................  $     8
   Additional paid-in capital.................................................   36,725
Estimated fair value of CBS stock options to be assumed by Viacom (note 3)....      200
                                                                                -------
Estimated net increase in Viacom equity.......................................  $36,933
                                                                                =======
</TABLE>

                                       36
<PAGE>
                    NOTES TO UNAUDITED VIACOM/CBS PRO FORMA
              COMBINED CONDENSED FINANCIAL STATEMENTS (continued)

                (tables in millions, except per share amounts)

(3)  Merger

     To record the excess purchase price over the net tangible and identifiable
intangible assets acquired in connection with the merger as described in notes 1
and 2, after the elimination of certain CBS Pro Forma Combined balances at June
30, 1999:

<TABLE>
<S>                                                                       <C>
Estimated net increase in Viacom equity................................  $ 36,933
Less: Shareholders' equity of CBS Pro Forma Combined at June 30, 1999
  Common stock.........................................................      (800)
  Additional paid-in capital...........................................   (14,596)
  Common stock held in treasury........................................     1,467
  Retained earnings/Accumulated other comprehensive loss...............    (1,243)
Adjustments:
 Add: Liability for conversion of CBS stock options, net of deferred
  taxes................................................................       833
                                                                         --------
Excess purchase price over net tangible and identifiable intangible
 assets acquired.......................................................    22,594
Identifiable intangible assets acquired................................    23,689
                                                                         --------
Excess purchase price over net tangible assets acquired................  $ 46,283
                                                                         ========
Incremental amortization expense of excess purchase price over net
 tangible and identifiable intangible assets acquired:
 Twelve month amortization.............................................  $    565
                                                                         ========
 Six month amortization................................................  $    282
                                                                         ========
</TABLE>

     The above pro forma adjustments are based on preliminary estimates. The
final allocation of the purchase price will be determined after the completion
of the merger and will be based on appraisals and a comprehensive final
evaluation of the fair value of CBS' tangible and identifiable intangible assets
acquired and liabilities assumed at the time of the merger.  For the purpose of
these unaudited pro forma combined condensed financial statements, amortization
of the excess purchase price over tangible net assets acquired of approximately
$46.3 billion is computed on a straight-line basis using useful lives as
follows:  $37.2 billion (40 years), $6.6 billion (30 years) and $2.5 billion (10
years).

     Generally accepted accounting principles currently require that acquired
intangible assets be amortized over periods not to exceed 40 years.  Viacom
believes that the intangible assets acquired from CBS included in the 40-year
category are comprised principally of the franchises, FCC licenses, and
trademarks of CBS assets with indefinite lives, which have historically
appreciated in value over time.  In addition, Viacom intends to continue to
expand the combined company's existing lines of business, develop new businesses
by leveraging the well known franchises, trademarks and products of Viacom and
CBS, and take advantage of synergies that exist between Viacom and CBS to
further strengthen existing lines of business.  Viacom believes that it will
benefit from the merger for an

                                       37
<PAGE>

                    NOTES TO UNAUDITED VIACOM/CBS PRO FORMA
              COMBINED CONDENSED FINANCIAL STATEMENTS (continued)

                (tables in millions, except per share amounts)

indeterminable period of time of at least 40 years and, therefore, a 40-year
amortization period for the $37.2 billion portion of the excess purchase
consideration is appropriate.  After the completion of the merger, Viacom will
complete valuations and other studies of the significant assets, liabilities and
business operations of CBS as of the time of the merger.  Using this
information, Viacom will make a final allocation of the purchase consideration,
including allocation to tangible assets and liabilities, identifiable intangible
assets and goodwill.  Accordingly, depreciation and amortization, as presented
in the pro forma combined condensed statements of operations for the year and
six months ended December 31, 1998 and June 30, 1999, may fluctuate
significantly from the preliminary estimate when the final appraisals of
tangible and intangible assets are completed.

     Certain limited rights to receive cash in lieu of Viacom options exist for
the majority of the historical CBS stock options outstanding prior to the
announcement of the merger.  To reflect the liability associated with these
stock options, these unaudited pro forma combined condensed financial statements
assume that the options will be settled in cash for approximately $1.4 billion.
Accordingly, the issuance of long-term debt of $470 million and adjustments to
reflect the use of cash and investments, classified as other noncurrent assets,
of $532 million and $387 million, respectively, have been recorded in the pro
forma balance sheet to reflect the financing and funding of such obligations at
the effective time of the merger.  In addition, related interest expense of $38
million and $85 million for the six months of 1999 and the twelve months of
1998, respectively, have been recorded in the unaudited pro forma combined
condensed statements of operations.  Deferred taxes have been provided for on
the respective book and tax basis differences at a 40 percent  marginal tax
rate.  Additional options with a fair value of $200 million either do not
contain these limited rights or are options related to underlying shares which
cannot be disposed of for some designated period of time, and, as such, have
been reflected as an adjustment to additional paid-in capital within
shareholders' equity.

(4)  Other Viacom Events

     On August 10, 1999, Blockbuster Inc., a subsidiary of Viacom, completed the
initial public offering of 31 million shares of its  Class A common stock at $15
per share.  Viacom owns 100% of the outstanding shares of Blockbuster Class B
common stock, which represents approximately 82.3% of Blockbuster's equity value
after the initial public offering.  As a result of the issuance of subsidiary
stock, Viacom recorded a pro forma reduction to additional paid-in capital of
approximately $662 million.  Of this amount, $5 million represents transaction
costs which were prepaid prior to June 30, 1999.  Net proceeds from this
offering of approximately $437 million were used to repay Blockbuster debt.

     The net decrease in interest expense of $1 million and $6 million for the
six months ended June 30, 1999 and the twelve months ended December 31, 1998,
respectively, is attributable to the repayment of debt with the Blockbuster
initial public offering net proceeds of $437 million, partially offset by the
increase in interest expense due to the higher interest rate attributable to the
Blockbuster debt and the amortization of deferred debt issue costs incurred in
connection with the Blockbuster debt.

                                       38
<PAGE>

                    NOTES TO UNAUDITED VIACOM/CBS PRO FORMA
              COMBINED CONDENSED FINANCIAL STATEMENTS (continued)

                (tables in millions, except per share amounts)


     The adjustment to minority interest reflects Blockbuster's initial public
offering of its shares as discussed above.

(5)  Income Tax Expense

     Income tax expense on the pro forma results of operations and the pro forma
adjustments, excluding non-deductible goodwill amortization, is calculated at a
40 percent marginal tax rate.

(6)  Items not included in the Unaudited Pro Forma Combined Condensed Financial
     Statements

     The preceding unaudited pro forma combined condensed financial statements
do not include any pro forma adjustments for the following:

     .    Viacom has entered into agreements with the two Deputy Chairmen of
          Viacom, regarding the terms of their resignations upon the effective
          time of the merger, and expects to recognize a charge of approximately
          $300 million which consists principally of a non-cash, pre-tax charge
          for stock options granted to them over the life of their employment
          with Viacom.

     .    Viacom anticipates recording a pre-tax restructuring charge in
          connection with the acquisition of the remaining minority interest of
          Spelling Entertainment Group Inc. of approximately $70-$90 million in
          the third quarter of 1999.

     .    Any operating efficiencies and cost savings that may be achieved with
          respect to the combined companies.

     .    Upon closing of the merger, the combined companies may incur certain
          integration related expenses as a result of the elimination of
          duplicate facilities and functions, operational realignment and
          related workforce reductions.  Such CBS costs would generally be
          recognized as a liability assumed as of the merger date resulting in
          additional goodwill while Viacom related costs would be recognized as
          an expense through the statements of operations.

     .    Transactions between Viacom and CBS, including transactions between
          Viacom and companies proposed to be acquired by CBS, have not been
          eliminated in the unaudited pro forma combined condensed financial
          statements, as the amounts are not material for the periods presented.

     .    Transaction costs related to the merger are not expected to have a
          material impact on these unaudited pro forma combined condensed
          financial statements.

     .    In connection with the merger, certain radio and television stations
          may have to be divested in order to comply with current FCC
          regulations.  Also, Viacom may be

                                       39
<PAGE>

                    NOTES TO UNAUDITED VIACOM/CBS PRO FORMA
              COMBINED CONDENSED FINANCIAL STATEMENTS (continued)

                 (tables in millions, except per share amounts)

        required to reduce or divest its interest in the United Paramount
        Network to comply with FCC rules limiting the common ownership of
        certain television networks. Generally, any gains or losses associated
        with disposition of historical Viacom assets would be recognized through
        the statements of operations while the gain or loss on the disposition
        of historical CBS assets would likely be recognized as an adjustment to
        goodwill.

 .       Viacom has announced that, subject to Viacom Board approval and the
        receipt of a supplemental tax ruling from the Internal Revenue Service
        reflecting the merger, it may split-off Blockbuster by offering to
        exchange all of its shares of Blockbuster for shares of Viacom's common
        stock. The aggregate market value of the shares of Blockbuster common
        stock based on the October 4, 1999 closing price of $12.00 per share of
        Blockbuster common stock was approximately $2.1 billion. The pro forma
        net book value of Blockbuster at June 30, 1999, after giving effect to
        the initial public offering, was approximately $5.1 billion. If Viacom
        determines to engage in the split-off, any difference between the fair
        market value and net book value at the time of the split-off will be
        recognized as a gain or loss for accounting purposes. The actual amount
        of the gain or loss will depend upon the fair market value and net book
        value of Blockbuster at the time of the split-off as well as the
        exchange ratio used in the split-off. In addition, in a tax-free split-
        off, Viacom/CBS pro forma shareholders' equity will be reduced by an
        amount no greater than the net book value of Blockbuster at the time of
        the split-off. Viacom has no obligation to effect the split-off either
        before or after the merger. Viacom and CBS cannot give any assurance as
        to whether or not or when the split-off will occur or as to the terms of
        the split-off if it does occur, or whether or not the split-off, if it
        does occur, will be tax-free.

(7)     Reclassifications

        Certain reclassifications have been made from the historical Viacom
financial statements to conform to the unaudited pro forma combined condensed
financial statements presentation.

                                       40
<PAGE>

Unaudited CBS/King World Pro Forma Combined Condensed Financial Information

General

     The following unaudited pro forma combined condensed financial statements
are presented using the purchase method of accounting for the merger of CBS and
King World, the June 4, 1998 acquisition of CBS Radio, Inc., formerly American
Radio Systems Corporation, by CBS and the probable acquisition of Outdoor
Systems, Inc. by Infinity Broadcasting Corporation which was announced on May
27, 1999. These financial statements also reflect the combination of
consolidated historical financial data of CBS, King World, American Radio, and
Outdoor Systems.

     The unaudited pro forma combined condensed balance sheet as of June 30,
1999 is presented as if the merger of CBS and King World, and the Outdoor
Systems acquisition had occurred on June 30, 1999. The unaudited pro forma
combined condensed statement of operations for the six months ended June 30,
1999 and the year ended December 31, 1998 is presented as if the merger of CBS
and King World, the acquisition of American Radio by CBS, the probable
acquisition of Outdoor Systems by Infinity, and the Infinity initial public
offering had occurred on January 1, 1998.  In the opinion of CBS management, all
adjustments and/or disclosures considered necessary for a fair presentation of
the pro forma data have been made.

     These unaudited pro forma combined condensed financial statements should be
read in conjunction with:  (i) CBS' consolidated financial statements and the
notes thereto as of and for the year ended December 31, 1998 and Management's
Discussion and Analysis included in CBS' Annual Report on Form 10-K for the year
ended December 31, 1998, which is incorporated by reference in this joint proxy
statement/prospectus; (ii) King World's consolidated financial statements and
the notes thereto as of and for the year ended August 31, 1998, which are
included in CBS' Current Report on Form 8-K filed on or about October 8, 1999,
which is incorporated by reference in this joint proxy statement/prospectus;
(iii) CBS' Quarterly Reports on Form 10-Q for the quarterly periods ended June
30, 1999 and March 31, 1999, which are incorporated by reference in this joint
proxy statement/prospectus; and (iv) King World's condensed consolidated
financial statements and notes thereto as of and for the quarterly period ended
May 31, 1999, which are included in CBS' Current Report on Form 8-K filed on or
about October 8, 1999, which is incorporated by reference in this joint proxy
statement/prospectus. These unaudited pro forma combined condensed financial
statements are presented for illustrative purposes only and are not necessarily
indicative of the operating results or financial position that would have been
achieved had the CBS and King World merger, the acquisition of American Radio by
CBS, the probable acquisition of Outdoor Systems by Infinity, or the Infinity
initial public offering been consummated as of the dates indicated, or of the
results that may be obtained in the future.

                                       41
<PAGE>

                      UNAUDITED CBS/KING WORLD PRO FORMA
                       COMBINED CONDENSED BALANCE SHEET
                              AS OF JUNE 30, 1999
                                 (in millions)
<TABLE>
<CAPTION>
                                                                             Pro Forma            Pro Forma
                                                                          Adjustments for          Combined    Adjustments
                                                  CBS       King World       CBS/King             CBS/King    For Other CBS
                                              Historical   May 31, 1999    World Merger             World       Events (8)
                                              ----------   ------------   --------------          ----------  --------------
<S>                                           <C>          <C>            <C>                     <C>         <C>
ASSETS:
Cash and cash equivalents.....................   $   742         $  375     $         ---           $ 1,117          $ (535)
Short-term investments........................       ---             32               ---                32             ---
Customer receivables, net.....................     1,127            102                (5)/(4)/       1,224             164
Program rights................................       516            ---               ---               516             ---
Deferred income taxes.........................       303            ---               ---               303              13
Prepaid and other current assets..............       163             96               ---               259              89
                                                 -------         ------     -------------           -------          ------
Total current assets..........................     2,851            605                (5)            3,451            (269)

Long-term investments.........................       ---            387               ---               387             ---
Property and equipment, net...................     1,132             20               ---             1,152           1,895
FCC licenses, net.............................     4,310            ---               ---             4,310             ---
Goodwill, net.................................    10,260            ---             1,731/(3)/       11,991           6,627
Other intangible and noncurrent assets........     1,805             94               ---             1,899              67
                                                 -------         ------     -------------           -------          ------
Total assets..................................   $20,358         $1,106     $       1,726           $23,190          $8,320
                                                 =======         ======     =============           =======          ======
LIABILITIES AND
 SHAREHOLDERS' EQUITY:
Current maturities of long-term debt..........   $    79         $  ---     $         ---           $    79          $  186
Liabilities for talent and program rights.....       374            ---               ---               374             ---
Accounts payable, accrued and other
      liabilities.............................     1,255            143                25/(3)/        1,418              88
                                                                                       (5)/(4)/
                                                 -------         ------     -------------           -------          ------
Total current liabilities.....................     1,708            143                20             1,871             274

Long-term debt................................     2,111            ---               ---             2,111           1,172
Net liabilities of discontinued operations....       985            ---               ---               985             ---
Pension liability.............................       846            ---               ---               846             ---
Postretirement benefit liability..............     1,020            ---               ---             1,020             ---
Other noncurrent liabilities..................     2,368            ---               ---             2,368             102
                                                 -------         ------     -------------           -------          ------
Total liabilities.............................     9,038            143                20             9,201           1,548
                                                 -------         ------     -------------           -------          ------
Minority interest in equity of
      consolidated subsidiaries...............     1,625            ---               ---             1,625           3,964
Shareholders' equity:
Preferred stock...............................       ---            ---               ---               ---             ---
Common stock..................................       743              1                57/(3)/          800             ---
                                                                                       (1)/(3)/
Capital in excess of par value................     9,176            151             2,282/(3)/       11,788           2,808
                                                                                      330/(3)/
                                                                                     (151)/(3)/
Common stock held in treasury,
     at cost..................................    (1,467)          (446)              446/(3)/       (1,467)            ---
Retained earnings.............................     1,910          1,257            (1,257)/(3)/       1,910             ---
Accumulated other comprehensive
     loss.....................................      (667)           ---               ---              (667)            ---
                                                 -------         ------     -------------           -------          ------
Total shareholders' equity....................     9,695            963             1,706            12,364           2,808
                                                 -------         ------     -------------           -------          ------
Total liabilities and shareholders' equity....   $20,358         $1,106     $       1,726           $23,190          $8,320
                                                 =======         ======     =============           =======          ======
<CAPTION>
                                                   CBS
                                                Pro Forma
                                                 Combined
                                                ----------
<S>                                             <C>
ASSETS:
Cash and cash equivalents.....................    $   582
Short-term investments........................         32
Customer receivables, net.....................      1,388
Program rights................................        516
Deferred income taxes.........................        316
Prepaid and other current assets..............        348
                                                  -------
Total current assets..........................      3,182
Long-term investments.........................        387
Property and equipment, net...................      3,047
FCC licenses, net.............................      4,310
Goodwill, net.................................     18,618
Other intangible and noncurrent assets........      1,966
                                                  -------
Total assets..................................    $31,510
                                                  =======
LIABILITIES AND
 SHAREHOLDERS' EQUITY:
Current maturities of long-term debt..........    $   265
Liabilities for talent and program rights.....        374
Accounts payable, accrued and other
      liabilities.............................      1,506

                                                  -------
Total current liabilities.....................      2,145
Long-term debt................................      3,283
Net liabilities of discontinued operations....        985
Pension liability.............................        846
Postretirement benefit liability..............      1,020
Other noncurrent liabilities..................      2,470
                                                  -------
Total liabilities.............................     10,749
                                                  -------
Minority interest in equity of
      consolidated subsidiaries...............      5,589
Shareholders' equity:
Preferred stock...............................        ---
Common stock..................................        800

Capital in excess of par value................     14,596


Common stock held in treasury,
     at cost..................................     (1,467)
Retained earnings.............................      1,910
Accumulated other comprehensive
     loss.....................................       (667)
                                                  -------
Total shareholders' equity....................     15,172
                                                  -------
Total liabilities and shareholders' equity....    $31,510
                                                  =======
</TABLE>


          See accompanying notes to unaudited CBS/King World pro forma
                    combined condensed financial statements.

                                       42
<PAGE>

                      UNAUDITED CBS/KING WORLD PRO FORMA
                  COMBINED CONDENSED STATEMENT OF OPERATIONS
                    FOR THE SIX MONTHS ENDED JUNE 30, 1999

                    (in millions, except per share amounts)

<TABLE>
<CAPTION>
                                                                                Pro Forma            Pro Forma
                                                            King World       Adjustments for         Combined    Adjustments For
                                                         Six months ended       CBS/King             CBS/King       Other CBS
                                       CBS Historical     May 31, 1999(7)      World Merger            World        Events (8)
                                       ---------------  -------------------  ----------------        ----------  ----------------
<S>                                    <C>              <C>                  <C>                     <C>         <C>
Revenues..............................        $ 3,446              $ 390               $ (20)/(4)/   $ 3,816          $ 374
Operating expenses....................         (2,051)              (238)                 20/(4)/     (2,269)          (173)
Marketing, general and
 administrative.......................           (597)               (44)                ---            (641)           (19)
Depreciation and
 amortization.........................           (301)                (2)                (87)/(5)/      (390)          (171)
Residual costs of discontinued
 businesses...........................            (85)               ---                 ---             (85)           ---
                                              -------              -----         -----------         -------          -----
Operating profit (loss)...............            412                106                 (87)            431             11
Other income and expense, net.........             (6)               ---                 ---              (6)             2
Interest expense, net.................            (97)                14                 ---             (83)           (60)
                                              -------              -----         -----------         -------          -----
Income (loss) from continuing
 operations before income taxes and
 minority interest in income of
 consolidated subsidiaries............            309                120                 (87)            342            (47)
Income tax expense....................           (176)               (42)                ---            (218)           (21)
Minority interest in income
 of consolidated subsidiaries.........            (30)               ---                 ---             (30)            (2)
                                              -------              -----         -----------         -------          -----
Income (loss) from continuing
 operations...........................        $   103              $  78         $       (87)        $    94          $ (70)
                                              =======              =====         ===========         =======          =====
Income from continuing
 operations per share:
   Basic..............................           $.15                                                   $.13
   Diluted............................           $.15                                                   $.12
Weighted average shares outstanding
   Basic..............................            694                                     57/(2)(6)/     751
   Diluted............................            710                                     60             770
<CAPTION>
                                           CBS
                                        Pro Forma
                                         Combined
                                        ----------
<S>                                      <C>
Revenues..............................   $ 4,190
Operating expenses....................    (2,442)
Marketing, general and
 administrative.......................      (660)
Depreciation and
   amortization.......................      (561)
Residual costs of discontinued
 businesses...........................       (85)
                                         -------
Operating profit (loss)...............       442
Other income and expense, net.........        (4)
Interest expense, net.................      (143)
                                         -------
Income (loss) from continuing
 operations before income taxes and
  minority interest in income of
  consolidated subsidiaries...........       295

Income tax expense....................      (239)
Minority interest in income
   of consolidated subsidiaries.......       (32)
                                         -------
Income (loss) from continuing
 operations...........................   $    24
                                         =======
Income from continuing
   operations per share:
   Basic..............................      $.03
   Diluted............................      $.03
Weighted average shares
   outstanding
   Basic..............................       751
   Diluted............................       770
</TABLE>

         See accompanying notes to unaudited CBS/King World pro forma
                   combined condensed financial statements.

                                      43
<PAGE>
                      UNAUDITED CBS/KING WORLD PRO FORMA
                  COMBINED CONDENSED STATEMENT OF OPERATIONS
                     FOR THE YEAR ENDED DECEMBER 31, 1998

                    (in millions, except per share amounts)

<TABLE>
<CAPTION>

                                                          King World           Pro Forma      Pro Forma
                                                        Twelve months       Adjustments for   Combined    Adjustments For    CBS
                                                        ended November         CBS/King       CBS/King       Other CBS    Pro Forma
                                       CBS Historical     30, 1998(7)        World Merger      World        Events (8)     Combined
                                       ---------------  ----------------   ----------------  ---------- ----------------  ----------
<S>                                      <C>            <C>                 <C>               <C>         <C>               <C>
Revenues................................ $ 6,805              $ 705         $ (23)/(4)/       $ 7,487             $ 874     $ 8,361
Operating expenses......................  (4,373)              (442)           23/(4)/         (4,792)             (450)     (5,242)
Marketing, general and
  administrative........................  (1,216)               (78)          ---              (1,294)              (41)     (1,335)
Depreciation and
  amortization..........................    (571)                (2)         (177)/(5)/          (750)             (363)     (1,113)
Residual costs of discontinued
  businesses............................    (163)               ---           ---                (163)              ---        (163)
                                         -------              -----        ------             -------             -----     -------
Operating profit (loss).................     482                183          (177)                488                20         508
Other income and expense, net...........      43                ---           ---                  43                (5)         38
Interest expense, net...................    (370)                34           ---                (336)              (27)       (363)
                                         -------              -----        ------             -------             -----     -------
Income (loss) from continuing
  operations before income taxes and
  minority interest in income of
  consolidated subsidiaries.............     155                217          (177)                195               (12)        183
Income tax expense......................    (161)               (74)          ---                (235)              (85)       (320)
Minority interest in income
  of consolidated subsidiaries..........      (6)               ---           ---                  (6)              (29)        (35)
                                         -------              -----        ------             -------             -----     -------
Income (loss) from continuing
 operations............................. $   (12)             $ 143        $ (177)            $   (46)            $(126)    $  (172)
                                         =======              =====        ======             =======             =====     =======

Basic and diluted loss from continuing
 operations per share................... $  (.02)                                             $  (.06)                       $ (.23)
Weighted average Basic and Diluted
 shares outstanding.....................     696                               57/(2)(6)/         753                           753
</TABLE>

          See accompanying notes to unaudited CBS/King World pro forma
                    combined condensed financial statements.


                                      44
<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                             FINANCIAL STATEMENTS

                  (tables in millions, except per share data)

(1)  Basis of Presentation

     The purchase method of accounting has been used in the preparation of the
accompanying unaudited pro forma combined condensed financial statements. Under
this method of accounting, the purchase price is allocated to assets acquired
and liabilities assumed based on their respective fair values as of the
effective time of the CBS/King World merger.  The excess of consideration paid
over the estimated fair value of net assets acquired will be recorded as
goodwill and amortized as a charge to earnings.  For purposes of the unaudited
pro forma combined condensed financial statements, the preliminary fair values
of King World's assets and liabilities were estimated by CBS management based
primarily on information furnished by the management of King World.  The final
allocation of the purchase price will be determined after the consummation of
the CBS/King World merger and will be based on appraisals and a comprehensive
final evaluation of the fair value of assets acquired and liabilities assumed of
King World.

(2)  Purchase Price Information

     Pursuant to the merger agreement, shareholders of King World will receive
 .81 of a share of CBS common stock for each share of King World common stock
issued and outstanding at the consummation of the CBS/King World merger.  The
total number of King World shares issued and outstanding during the period
subsequent to the CBS/King World merger announcement but prior to its
consummation is not anticipated to fluctuate from the ordinary course.  For the
purpose of the pro forma combined condensed financial statements, the $40.8125
per share value of CBS common stock to be issued was calculated based upon the
market price per share at the close of business on March 31, 1999.

<TABLE>
<CAPTION>

<S>                                                                             <C>
Total estimated King World common shares outstanding.........................      70.8
Exchange Ratio...............................................................       .81
                                                                                 ------
Estimated CBS common shares to be issued.....................................      57.3
                                                                                 ======

Purchase Price:
Estimated value of CBS common stock to be issued in connection with CBS/King
  World merger (57.3 shares at $40.8125 per share):
  Common Stock, $1.00 par value..............................................    $   57
  Capital in excess of par value.............................................     2,282
Estimated fair value of stock options assumed................................       330
                                                                                 ------
Estimated net increase in CBS equity.........................................    $2,669
                                                                                 ======
</TABLE>
                                      45

<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS--(continued)

                  (tables in millions, except per share data)

(3)  Purchase Price and Elimination of Historical Balances

     To record the purchase price paid in connection with the CBS/King World
merger as described in Note 1 and Note 2 above and to eliminate certain
historical King World balances.

<TABLE>
<S>                                                             <C>
Estimated net increase in CBS equity (see Note 2).............  $ 2,669
Less:  Shareholders' equity of King World at June 30, 1999
       Common stock...........................................       (1)
       Capital in excess of par value.........................     (151)
       Common stock held in treasury..........................      446
       Retained earnings......................................   (1,257)
Adjustments:
Add:  Estimated accrued transaction costs.....................       25
                                                                -------
Excess purchase price over fair value of net assets acquired..  $ 1,731
                                                                =======
</TABLE>

     The above pro forma adjustments are based on preliminary estimates.  The
final allocation of the purchase price will be determined after the consummation
of the CBS/King World merger and will be based on appraisals and a comprehensive
final evaluation of the fair value of assets acquired and liabilities assumed of
King World.  As further analysis is performed, these estimates may be revised at
a later date.

(4)  Existing Relationship Between CBS and King World

     Through an existing agreement with King World, CBS' owned-and-operated
television stations pay for certain programming from King World. The following
adjustments have been made to eliminate the balances associated with the
transactions between CBS and King World:
<TABLE>
Balance Sheet
<S>                                                                 <C>
Customer receivables/Accounts payable at June 30, 1999..............  $ 5

Statements of Operations
Revenue/operating expenses for the six months ended June 30, 1999...  $20
Revenue/operating expenses for the year ended December 31, 1998.....  $23
</TABLE>

(5)   Amortization of Goodwill

     The pro forma adjustments are based on preliminary estimates.  The final
allocation of the purchase price will be determined after the consummation of
the CBS/King World merger and will be based on appraisals and a comprehensive
final evaluation of the fair value of assets acquired and

                                      46

<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


liabilities assumed of King World.  As further analysis is performed, including
obtaining appraisals for identifiable intangible assets and programming
commitments acquired, these estimates may be significantly revised, including
the estimated amortization periods. Estimated goodwill amortization is computed
on a straight-line basis over a 10-year period.  If goodwill amortization had
been computed assuming a 20-year period, pro forma operating results for the six
months ended June 30, 1999 and for the year ended December 31, 1998 on a pre-
and post-tax basis would have improved by $43 million and $89 million,
respectively, or approximately $.06 and $.12 per share, respectively, on both a
basic and diluted basis.

(6)  Average Shares Outstanding

     The average CBS common shares outstanding used in calculating pro forma
income (loss) per common share from continuing operations, as adjusted for Other
CBS Events, are calculated assuming that the estimated number of shares of CBS
common stock to be issued in connection with the CBS/King World merger were
outstanding from January 1, 1998.  For the six months ended June 30, 1999, the
average common shares outstanding used in calculating pro forma combined diluted
income per share include the impact of options to purchase shares of common
stock.  Shares of common stock issuable under deferred compensation arrangements
were not included in computing pro forma diluted income per common share for the
six months ended June 30, 1999, because their inclusion would result in
increased income per common share.  Shares of common stock issuable under
deferred compensation arrangements approximated 3 million for the six months
ended June 30, 1999.  For the year ended December 31, 1998, options to purchase
shares of common stock as well as shares issuable under deferred compensation
arrangements were not included in computing pro forma diluted income per common
share because their inclusion would result in a smaller loss per common share.
For the year ended December 31, 1998, options to purchase shares of common stock
as well as common stock issuable under deferred compensation arrangements
approximated 21 million shares.

(7)  King World Condensed Statements of Operations

     The King World condensed statement of operations for the six months ended
May 31, 1999 is calculated by adding the King World second quarter and third
quarter statements of operations as filed in its Quarterly Reports on Form 10-Q
for the three-month periods ended February 28, 1999 and May 31, 1999,
respectively.

     The King World condensed statement of operations for the twelve month
period ended November 30, 1998 is calculated by adding the King World first
quarter statement of operations as filed in its Quarterly Report on Form 10-Q
for the three-month period ended November 30, 1998, and subtracting the prior
year first quarter statement of operations as filed in their Quarterly Report on
Form 10-Q for the period ended November 30, 1997, from its total year 1998
statement of operations as filed in its Annual Report on Form 10-K for the
fiscal year ended August 31, 1998.

(8)  Other CBS Events

                                       47
<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


     The unaudited pro forma combined condensed financial statements are
presented after giving effect to the following Other CBS Events:

Acquisition of American Radio by CBS

     On June 4, 1998, CBS acquired the radio operations of American Radio for
$1.4 billion in cash plus the assumption of debt with a fair value of
approximately $1.3 billion. This acquisition has been accounted for under the
purchase method of accounting.

Probable Acquisition of Outdoor Systems by Infinity

     On May 27, 1999, Infinity signed a definitive agreement to acquire Outdoor
Systems for approximately $8.7 billion which includes the assumption of debt
with a fair value of approximately $1.9 billion.  This acquisition will be
accounted for under the purchase method of accounting.  In connection with this
acquisition Infinity will issue approximately 231 million shares of its Class A
common stock which will dilute CBS' equity ownership in Infinity to
approximately 65 percent.  The consummation of the acquisition is subject to
certain conditions, including the expiration or termination of the waiting
period under the HSR Act and the approval of Outdoor Systems and Infinity
shareholders.  In connection with the HSR Act filing, Infinity and Outdoor
Systems have received a second request for information from the Department of
Justice, to which they are responding.

Infinity Initial Public Offering

     In 1998, CBS formed a new company, named Infinity, comprising the radio and
outdoor advertising operations of CBS.  In December 1998, Infinity sold 18.2
percent of its common stock in an initial public offering, generating proceeds
of approximately $3 billion.  These proceeds were used to pay down an
intercompany note payable to CBS.  CBS used the proceeds of the payment on the
note to pay down existing debt under the CBS revolving credit facility and other
debt of CBS and made investments in short-term marketable securities.

     The following table sets forth the estimated adjustments affecting CBS'
consolidated financial statements for the inclusion of the probable acquisition
of Outdoor Systems by Infinity.  In that regard, the historical statement of
position at June 30, 1999, has been incorporated into the pro forma financial
information and is adjusted to reflect the acquisition purchase price as well as
certain other items such as: the repayment of long-term debt; the step up in
value of certain long-term debt instruments; the elimination of existing debt
financing costs; the accrual for the estimated transaction costs; and the
recognition of the estimated excess purchase price over the fair value of assets
acquired as goodwill.  As further analysis is performed, including appraisals on
identifiable tangible and intangible assets acquired and liabilities assumed,
these estimates may be significantly revised including the estimated
amortization periods. Minority interest in equity of consolidated subsidiaries
has also been adjusted to reflect Infinity's distribution of its stock in
connection with the acquisition of Outdoor Systems and thus the reduction of
CBS' equity interest in Infinity from approximately 82 percent to approximately
65 percent.

                                       48
<PAGE>


        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


<TABLE>
<CAPTION>
                                                  Outdoor                     Adjustments
                                                  Systems       Pro Forma    For Other CBS
                                               June 30, 1999   Adjustments       Events
                                               --------------  ------------  --------------
<S>                                            <C>             <C>           <C>
ASSETS:
Cash and cash equivalents..........................   $   13        $ (548)         $ (535)
Customer receivables, net..........................      164           ---             164
Deferred income taxes..............................       13           ---              13
Prepaid and other current assets...................       89           ---              89
                                                      ------        ------          ------
Total current assets...............................      279          (548)           (269)
Property and equipment, net........................    1,895           ---           1,895
Goodwill, net......................................      604         6,023           6,627
Other intangible and noncurrent assets.............       49            18              67
                                                      ------        ------          ------
Total assets.......................................   $2,827        $5,493          $8,320
                                                      ======        ======          ======

LIABILITIES AND SHAREHOLDERS' EQUITY:
Current maturities of long-term debt...............   $  186   $       ---          $  186
Accounts payable, accrued and other
 liabilities......................................        73            15              88
                                                      ------        ------          ------
Total current liabilities..........................      259            15             274
Long-term debt.....................................    1,645          (473)          1,172
Other noncurrent liabilities.......................      112           (10)            102
                                                      ------        ------          ------
Total liabilities..................................    2,016          (468)          1,548
                                                      ------        ------          ------

Minority interest in equity of consolidated
 subsidiaries.....................................       ---         3,964           3,964
Shareholders' equity:
Common stock.......................................        2            (2)            ---
Capital in excess of par value.....................      764         2,044           2,808
Common stock held in treasury, at cost.............       (4)            4             ---
Retained earnings..................................       55           (55)            ---
Accumulated other comprehensive loss...............       (6)            6             ---
                                                      ------        ------          ------
Total shareholders' equity.........................      811         1,997           2,808
                                                      ------        ------          ------
Total liabilities and shareholders' equity.........   $2,827        $5,493          $8,320
                                                      ======        ======          ======
</TABLE>

                                     48_1
<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


     The following table combines the above mentioned Other CBS Events as if
these transactions had occurred as of January 1, 1999 and were reflected in CBS'
results of operations for the six-month period ended June 30, 1999:

<TABLE>
<CAPTION>
                                                                       Outdoor                         Adjustments
                                                                       Systems       Pro Forma        For Other CBS
                                                                    June 30, 1999   Adjustments           Events
                                                                    --------------  ------------      --------------
<S>                                                                 <C>             <C>               <C>
Revenues..........................................................          $ 374        $  ---               $ 374
Operating expenses................................................           (173)          ---                (173)
Marketing, general and administrative.............................            (19)          ---                 (19)
Depreciation and amortization.....................................            (71)         (100)/(d)/          (171)
                                                                            -----         -----               -----
Operating profit (loss)...........................................            111          (100)                 11
Other income and expense, net.....................................              2           ---                   2
Interest expense, net.............................................            (74)           14/(e)/            (60)
                                                                            -----         -----               -----
Income (loss) from continuing operations before income taxes and
 minority interest in income of consolidated subsidiaries.........             39           (86)                (47)
Income tax expense................................................            (15)           (6)/(c)/           (21)
Minority interest in income of consolidated subsidiaries..........            ---            (2)/(f)/            (2)
                                                                            -----         -----               -----
Income (loss) from continuing operations..........................          $  24         $ (94)              $ (70)
                                                                            =====         =====               =====
</TABLE>

                                     48_2
<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


          The following table combines the above mentioned Other CBS Events as
if these transactions had occurred as of January 1, 1998 and were reflected in
CBS' results of operations for the year ended December 31, 1998:

<TABLE>
<CAPTION>

                                  American Radio Acquisition                         Outdoor Systems Acquisition
                             -------------------------------------              ------------------------------------
                              American
                                Radio                    American               Outdoor                   Outdoor     Adjustments
                               through                    Radio                 Systems                   Systems         For
                               June 4,     Pro Forma    Pro Forma   Infinity   December     Pro Forma    Pro Forma     Other CBS
                                1998      Adjustments    Combined      IPO      31, 1998   Adjustments    Combined       Events
                             -----------  ------------  ----------  ---------  ---------   ------------  ----------  --------------

<S>                            <C>        <C>           <C>         <C>        <C>         <C>           <C>         <C>
Revenues.......................   $ 168   $  ---            $ 168   $  ---         $ 706   $  ---            $ 706           $ 874
Operating expenses.............    (119)     ---             (119)     ---          (331)     ---             (331)           (450)
Marketing, general and
 administrative................      (4)     ---               (4)     ---           (37)     ---              (37)            (41)

Depreciation and
 amortization..................     (28)     (10)/(a)/        (38)     ---          (123)    (202)/(d)/       (325)           (363)
                                  -----    -----            -----   ------         -----    -----            -----           -----
Operating profit (loss)........      17      (10)               7      ---           215     (202)              13              20
Other income and expense,
 net...........................     ---      ---              ---      ---            (5)     ---               (5)             (5)
Interest expense, net..........     (30)     (45)/(b)/        (75)     169/(g)/     (138)      17/(e)/        (121)            (27)
                                  -----    -----            -----   ------         -----    -----            -----           -----
Income (loss) from continuing
 operations before income
 taxes and minority interest
 in income of consolidated
 subsidiaries..................     (13)     (55)             (68)     169            72     (185)            (113)            (12)
Income tax expense.............       9       10/(c)/          19      (67)/(c)/     (31)      (6)/(c)/        (37)            (85)
Minority interest in
 income of consolidated
 subsidiaries..................     ---      ---              ---      (13)/(f)/     ---      (16)/(f)/        (16)            (29)
                                  -----    -----            -----   ------         -----    -----            -----           -----
Income (loss) from
 continuing operations.........   $  (4)   $ (45)           $ (49)    $ 89         $  41    $(207)           $(166)          $(126)
                                  =====    =====            =====   ======         =====    =====            =====           =====
</TABLE>


     Pro forma adjustments giving effect to the Other CBS Events in the
unaudited pro forma combined condensed financial statements reflect the
following:

(a)  American Radio acquisition--amortization of goodwill and identifiable
     intangible assets, including FCC licenses on a straight-line basis over 40
     years.

(b)  Increase in interest expense resulting from borrowings under CBS' credit
     facility to finance the acquisition of American Radio including the
     repayment of certain American Radio revolver borrowings in conjunction with
     the consummation of the acquisition.

(c)  Income tax expense on the pro forma results of operations and the pro forma
     adjustments, excluding non-deductible goodwill amortization, is calculated
     at a 40 percent marginal tax rate.

                                     48_3
<PAGE>

        NOTES TO UNAUDITED CBS/KING WORLD PRO FORMA COMBINED CONDENSED
                       FINANCIAL STATEMENTS (continued)

                  (tables in millions, except per share data)


(d)  Outdoor Systems acquisition--amortization of goodwill and identifiable
     intangible assets on a straight-line basis over 30 years.

(e)  Reduction in interest expense resulting from the repayment of Outdoor
     Systems' credit facility with credit facility borrowings of Infinity where
     average borrowing rates are more favorable than previously experienced by
     Outdoor Systems.  In addition, the reduction of interest expense reflects
     the recording of all debt instruments assumed at fair value within the pro
     forma financial statements.  These reductions were partially offset by
     incremental interest expense recognized as a result of the assumed
     deconsolidation of Infinity from the CBS consolidated income tax return.

(f)  The adjustment to minority interest in income of consolidated subsidiaries
     reflects CBS' ownership interest dilution resulting from Infinity's assumed
     issuance of common stock to acquire Outdoor Systems.  In addition, for the
     year ended December 31, 1998 the adjustment reflects the impact of
     Infinity's initial public offering. As a result of the December 1998
     initial public offering CBS' equity ownership in Infinity was reduced to
     approximately 81.8 percent and will be further reduced to approximately 65
     percent after Infinity's probable acquisition of Outdoor Systems.

(g)  Reduction in the interest expense represents savings resulting from the
     assumed repayment of debt with the proceeds received from the Infinity
     public offering.

                                     48_4
<PAGE>

                           THE SHAREHOLDERS' MEETINGS

Date, Times and Places

     Viacom.  The Viacom special meeting will be held at ., New York, New York,
at . a.m., eastern standard time, on ., 1999.

     CBS.  The CBS special meeting will be held at ., New York, New York, at .
a.m., eastern standard time, on ., 1999.

Matters to be Considered at the Shareholders' Meetings

     Viacom.  At the Viacom special meeting, holders of Viacom Class A common
stock are being asked to adopt the merger agreement.  The merger agreement
provides for the merger of CBS and Viacom, the issuance of shares of Viacom non-
voting Class B common stock in the merger and the adoption of a proposed new
Restated Certificate of Incorporation for Viacom. See "The Merger" and "The
Merger Agreement." The Board of Directors of Viacom has declared that the merger
agreement is advisable, has unanimously approved the merger agreement and
unanimously recommends that Viacom shareholders vote "for" the adoption of the
merger agreement.

     CBS. At the CBS special meeting, holders of CBS common stock are being
asked to adopt the merger agreement.  The CBS Board has determined that the
merger is in the best interests of CBS, has unanimously approved the merger and
the merger agreement and unanimously recommends that CBS shareholders vote "for"
the adoption of the merger agreement.

Record Date; Shareholders Entitled to Vote; Quorum

     Viacom.  Only holders of record of Viacom Class A common stock at the close
of business on the Viacom record date are entitled to notice of, and holders of
record of Viacom Class A common stock at the close of business on the record
date are entitled to vote at, the Viacom special meeting.  On the record date,
 ., 1999, . shares of Viacom Class A common stock were issued and outstanding and
held by approximately . holders of record.  A majority of the shares of Viacom
Class A common stock issued and outstanding and entitled to vote on the record
date must be represented in person or by proxy at the Viacom special meeting in
order for a quorum to be present for purposes of transacting business at the
Viacom special meeting, including voting on the adoption of the merger
agreement. Holders of record of Viacom Class A common stock on the record date
are each entitled to one vote per share on all matters to be considered at the
Viacom special meeting.

     CBS.  Only holders of record of CBS common stock at the close of business
on the CBS record date, ., 1999, are entitled to receive notice of and to vote
at the CBS special meeting.  On ., 1999, . shares of CBS common stock were
issued and outstanding and held by approximately . holders of record.  A
majority of the shares of CBS common stock issued and outstanding and entitled
to vote on the record date must be represented in person or by proxy at the CBS
special meeting in order for a quorum to be present for purposes of voting on
the adoption of the merger agreement.  In the event that a quorum is not present
at the CBS special meeting, it is expected that the meeting will be adjourned or
postponed to solicit additional proxies.  Holders of record of CBS common stock
on the record date are each entitled to one vote per share on the matter to be
voted on at the CBS special meeting.

                                       49
<PAGE>

Votes Required

     Viacom.  The adoption of the merger agreement requires the affirmative vote
of a majority of the shares of Viacom Class A common stock issued and
outstanding on the record date.

     CBS.  The adoption of the merger agreement requires the affirmative vote of
a majority of the votes cast by all shareholders entitled to vote at the CBS
special meeting.

Submission of Proxies

     Shares represented by properly executed proxy cards received in time for
both Viacom's and CBS' special shareholder meetings will be voted at each
respective special meeting in the manner specified by the holders.  Properly
executed proxy cards that do not contain voting instructions will be voted in
favor of adoption of the merger agreement.

     Abstentions may be specified on all proposals except that shares of Viacom
Class A common stock or CBS common stock represented at the applicable special
meeting but not voting, including shares of Viacom Class A common stock or CBS
common stock, as the case may be, for which proxy cards have been received, but
with respect to which holders of shares have abstained on any matter, will be
treated as present at the applicable special meeting for purposes of determining
the presence or absence of a quorum for the transaction of all business.

     For voting purposes at the special meetings, only shares affirmatively
voted in favor of a proposal, including properly executed proxy cards not
containing voting instructions, will be counted as votes in favor of such
proposal.  With respect to Viacom's shareholders, the failure to submit a proxy
or to vote in person or the abstention from voting will have the same effect as
a vote against adoption of the merger agreement.  With respect to CBS
shareholders, the failure to submit a proxy or to vote in person or the
abstention from voting will have no effect on the outcome of the vote.  In
addition, under the applicable rules of the NYSE, brokers who hold shares in
street name for customers who are the beneficial owners of such shares are
prohibited from submitting a proxy to vote such customers' shares with respect
to the proposal to adopt the merger agreement absent instructions from the
beneficial owners of these shares.  These are referred to as broker non-votes.
With respect to Viacom's shareholders, broker non-votes will have the same
effect as votes against adopting the merger agreement but will have no effect on
any other matter.  With respect to CBS shareholders, broker non-votes will have
no effect on the outcome of the vote.

     The persons named as proxies by a Viacom or CBS shareholder may propose and
vote for one or more adjournments of the applicable special meeting, including,
without limitation, adjournments to permit further solicitations of proxies in
favor of any proposal; provided, however, that a proxy that is voted against the
proposal to adopt the merger agreement may not be voted in favor of any such
adjournment or postponement.

Revocability of Proxies

     The grant of a proxy on the enclosed Viacom or CBS form of proxy does not
preclude a shareholder from voting in person.  A shareholder may revoke a proxy
at any time prior to its exercise in one of three ways:  (1) by filing with the
Senior Vice President, General Counsel and Secretary of

                                       50
<PAGE>

Viacom (in the case of a Viacom shareholder) or the Vice President, Deputy
General Counsel and Secretary of CBS (in the case of a CBS shareholder) a duly
executed revocation of proxy; (2) by submitting another duly executed proxy
bearing a later date; or (3) by appearing at the applicable special meeting and
voting in person. Attendance at the relevant special meeting will not, in and of
itself, constitute revocation of a proxy.

Solicitation of Proxies

     Each of Viacom and CBS will bear the cost of the solicitation of proxies
from its own shareholders, except that Viacom and CBS will share equally the
cost of printing this joint proxy statement/prospectus and the fees associated
with the filing of this joint proxy statement/prospectus with the SEC.  In
addition to solicitation by mail, the directors, officers and employees of each
of Viacom and CBS may solicit proxies from shareholders of their respective
company by telephone or telegram or in person.  Arrangements will also be made
with brokerage houses and other custodians, nominees and fiduciaries for the
forwarding of solicitation material to the beneficial owners of stock held of
record by these persons, and Viacom and CBS will reimburse these custodians,
nominees and fiduciaries for their reasonable out-of-pocket expenses.

     . will assist in the solicitation of proxies by CBS.  . will receive a fee
of $., plus costs and expenses, for its services.

     Neither the Viacom Board nor the CBS Board is aware of any matter other
than those set forth in this joint proxy statement/prospectus that will be
brought before the Viacom special meeting or the CBS special meeting.  If,
however, other matters are properly presented at either special meeting, proxies
will be voted in accordance with the discretion of the holders of such proxies.


                SHAREHOLDERS SHOULD NOT SEND STOCK CERTIFICATES
                            WITH THEIR PROXY CARDS.

                                       51
<PAGE>

                                   THE MERGER

     The discussion in this joint proxy statement/prospectus of the merger and
the principal terms of the merger agreement is subject to, and qualified in its
entirety by reference to, the merger agreement, a copy of which is attached to
this joint proxy statement/prospectus as Annex A and is incorporated herein by
reference.

Background to the Merger

     On August 5, 1999, the FCC announced that it had adopted new regulations
that, for the first time, would permit a single person to own two television
stations in a single market, subject to certain limitations.  Since that date,
it has been widely reported that numerous owners of television stations have
been seeking opportunities to acquire or sell stations in reliance on the new
rules.

     On August 11, at the request of Mr. Karmazin, Mr. Karmazin and Mr. Redstone
met at the offices of Viacom.   Mr. Karmazin reviewed with Mr. Redstone the
businesses of CBS and discussed with Mr. Redstone various possible transactions
between the two companies, including an exchange of assets in the television and
cable television businesses and ways in which various businesses of the two
companies could be combined.

     On August 12, Mr. Redstone called Mr. Karmazin and suggested that they meet
again, together with Philippe Dauman and Thomas Dooley, Viacom's Deputy Chairmen
and Executive Vice Presidents, to discuss further the possible transactions
discussed at their August 11 meeting.

     On August 16, Messrs. Redstone, Dauman and Dooley met with Mr. Karmazin.
Mr. Karmazin proposed various alternative transactions involving the two
companies, including swapping Viacom's television stations for the cable
television networks of CBS and combining the entire businesses of Viacom and
CBS.  Mr. Karmazin emphasized the complementary nature of the assets of the two
companies.  Mr. Redstone indicated interest in the swap transaction, but did not
express a conclusion regarding a possible merger.  Mr. Karmazin said that he
would like to make a more detailed presentation regarding the businesses of CBS
to Messrs. Redstone, Dauman and Dooley.  The parties agreed to meet again on
August 24.

     On August 24, Mr. Karmazin again met with Messrs. Redstone, Dauman and
Dooley.  Mr. Karmazin presented information regarding CBS, describing the
performance of its assets, strategies for growth and the benefits of selling
advertising across different advertising media.  At the conclusion of the
presentation, Mr. Karmazin again suggested a merger involving the two companies,
proposing that CBS acquire Viacom at a premium to market value.  Mr. Redstone
indicated that he would not be interested in selling his stake in Viacom, but
indicated that, in light of the strong strategic fit between the two companies,
he would consider a merger of equals priced at market value, in which Mr.
Redstone's controlling interest in Viacom was preserved in the combined company
through the issuance of Viacom's non-voting Class B common stock to the
shareholders of CBS.  Mr. Redstone indicated that, if such a transaction was
pursued, he would recommend a role for Mr. Karmazin in which he would serve as
President and Chief Operating Officer of the combined company.  Mr. Karmazin
indicated his willingness to consider these terms and said that he would like to
discuss such a transaction with members of the CBS Board of Directors.

     On August 26, the CBS Board held a special meeting at which Mr. Karmazin
reviewed for the Board the conversations and contacts he had had with Mr.
Redstone to date and the current status of

                                       52
<PAGE>

discussions regarding the structure and terms of a possible transaction with
Viacom. Mr. Karmazin and Fredric G. Reynolds, CBS' Executive Vice President and
Chief Financial Officer, also reviewed for the Board the capital structure and
share ownership of Viacom. The CBS Board authorized Mr. Karmazin to continue his
discussions with Mr. Redstone. Following the August 26 meeting, detailed
publicly available information and analyst reports relating to the share
ownership of Viacom were distributed to the CBS Board.

     On August 25 and 26, representatives of Shearman & Sterling, counsel to
Viacom, held various discussions with representatives of Cravath, Swaine &
Moore, legal counsel to CBS, and representatives of Evercore, financial advisors
to CBS, concerning the structure of a possible transaction, exchange ratio
mechanisms and related matters.

     On August 26, Mr. Redstone and Mr. Karmazin met to continue their
discussions regarding management of the combined company and ways to assure the
CBS Board of Directors as to the management of the combined company in light of
the controlling shareholdings of Mr. Redstone.

     On August 27, representatives of Viacom, Morgan Stanley & Co.
Incorporated, financial advisors to Viacom, and Shearman & Sterling met with
representatives of CBS, Evercore and Cravath, Swaine & Moore to discuss the
structure and exchange ratio for a possible transaction, board composition and
management issues, the due diligence review process and related matters.  The
parties also finalized and executed a confidentiality agreement at this meeting.

     On August 29, senior executives and professional advisors of each of Viacom
and CBS met to exchange financial, legal and business due diligence information.
The due diligence process, which included review of documents and interviews
with executives and professional advisors of each company, continued through the
signing of the merger agreement.

     On August 30, Mr. Redstone and Mr. Karmazin discussed further the proposed
governance of the combined company.  The discussions related to Mr. Karmazin's
proposed responsibilities and powers as Chief Operating Officer and Mr.
Redstone's responsibilities and powers as Chief Executive Officer as well as
whether the proposed responsibilities of the Chief Operating Officer were
inconsistent with the continued involvement of Messrs. Dauman and Dooley as
senior managers of Viacom following the merger.  Mr. Redstone advised Mr.
Karmazin that Messrs. Dauman and Dooley had indicated to Mr. Redstone that, in
view of the strategic benefits to Viacom of the proposed transaction, they would
be willing to resign from their respective management positions at Viacom at the
closing of the transaction if that would facilitate the resolution of the
governance arrangements for the combined company.  Messrs. Redstone and Karmazin
also confirmed their understanding that the combined board of directors would
consist of a majority of Viacom representatives.  These points were discussed
further on August 31 between Mr. Redstone and Mr. Karmazin.

     On August 30, Shearman & Sterling delivered a draft merger agreement to
Cravath, Swaine & Moore.

     On August 31, the CBS Board held a special meeting to continue the Board's
previous discussions regarding a possible transaction between CBS and Viacom.
Mr. Karmazin described in detail the discussions with Mr. Redstone leading up to
the current proposal for a merger of CBS with Viacom.  Mr. Karmazin and other
members of CBS' senior management discussed with the CBS Board their views of
various aspects of the proposed transaction.  Louis Briskman, CBS' Executive
Vice

                                       53
<PAGE>

President and General Counsel, and representatives of Cravath, Swaine & Moore
discussed with the CBS Board its fiduciary duties with regard to its
consideration of the proposed transaction under applicable law. Representatives
of Evercore discussed with the CBS Board their views and preliminary analyses of
the financial aspects of the proposed transaction. The CBS Board reviewed and
considered, among other things, the initial results of the due diligence
investigation conducted to date, the proposed terms of the transaction, the
impact of the proposed transaction on CBS' other pending transactions and the
proposed terms relating to the management, board representation and governance
of the combined company. Following extensive discussion of these matters, the
CBS Board directed Mr. Karmazin to negotiate further with Viacom on the basis of
the CBS Board's recommendations with respect to the matters discussed during the
meeting, including matters relating to the management, board representation and
governance of the combined company.

     Following the CBS Board meeting on August 31, Cravath, Swaine & Moore and
Shearman & Sterling reviewed and discussed those areas identified by the CBS
Board of Directors as important for Mr. Karmazin to have delegated authority to
manage, those areas which a majority of the board of directors of the combined
company should have authority over and those areas requiring a supermajority
board vote, and the conceptual framework for implementing this arrangement.
Representatives of  Cravath, Swaine & Moore and Shearman & Sterling negotiated
the terms of these arrangements, including related changes to the Restated
Certificate of Incorporation and By-laws of Viacom, together with the terms and
conditions of the merger agreement and Mr. Karmazin's employment agreement,
throughout the period from August 31 through the signing of definitive
documentation on September 6.  In addition, Morgan Stanley, on behalf of Viacom,
and Evercore on behalf of CBS, continued to negotiate the exchange ratio through
September 2.

     On September 2, the Board of Directors of Viacom, at a special meeting,
received a presentation regarding the proposed terms of the transaction from
Viacom's outside counsel, and management received a presentation from Morgan
Stanley regarding the financial terms of the transaction and discussed the
proposed terms and the risks and merits of the proposed transaction.

     On September 2, the special meeting of the CBS Board reconvened and Mr.
Karmazin recounted for the CBS Board the events that had transpired since the
meeting recessed on August 31. Mr. Karmazin described in detail the proposed
terms that had been negotiated with Viacom with respect to the corporate
governance of Viacom following consummation of the proposed transaction, and
explained to the CBS Board that such governance arrangements would be reflected
in the proposed new Restated Certificate of Incorporation and By-laws of Viacom
as well as in a voting agreement between National Amusements, the holder of a
majority of Viacom's voting stock, and CBS. Following extensive discussion among
the members of the CBS Board, Mr. Karmazin, other members of CBS' senior
management, representatives of Cravath, Swaine & Moore and representatives of
Evercore, the CBS Board directed Mr. Karmazin to negotiate definitive agreements
and related documentation based on the terms outlined by Mr. Karmazin during the
meeting.

     On September 5, the CBS Board held a special meeting to continue the
Board's discussions with respect to the proposed merger and to consider the
merger agreement and the transactions contemplated thereby, including the
proposed consideration to be issued to CBS shareholders and the proposed terms
regarding the powers of the board of directors, the chief executive officer and
the chief operating officer of Viacom following the merger.  Mr. Karmazin and
other members of CBS' senior management, representatives of Cravath, Swaine &
Moore and representatives of Evercore made presentations to the CBS Board and
discussed with the CBS Board their views and analyses of various

                                       54
<PAGE>

aspects of the proposed transaction. Evercore delivered its oral opinion
(subsequently confirmed in writing) that, based upon the matters presented to
the CBS Board and as set forth in its opinion, as of such date, the exchange
ratio was fair, from a financial point of view, to the shareholders of CBS.

     After further deliberation, the CBS Board unanimously approved the merger
and the merger agreement and authorized, among other things, the execution of
the merger agreement, the voting agreement and the stockholder agreement and
unanimously recommended that CBS shareholders vote to adopt the merger
agreement.

     On September 5, the Compensation Committee of the Viacom Board met to
review and, subject to approval of the merger by the Viacom Board, approved the
proposed terms of Mr. Redstone's and Mr. Karmazin's employment agreements, the
resignation agreements for Messrs. Dauman and Dooley and the Viacom executive
severance plan.

     Also on September 5, at a special meeting of the Viacom Board, the Board
heard presentations on the results of the due diligence investigation and the
status of the negotiation of the merger agreement and related agreements and
received an updated presentation from Morgan Stanley. Morgan Stanley also
delivered to the Viacom Board its oral opinion that the exchange ratio was fair
from a financial point of view to Viacom.  The Board also was briefed on and
ratified the actions of the Compensation Committee, in the case of the
resignation agreements of Messrs. Dauman and Dooley and the employment agreement
of Mr. Redstone, without the participation of such individuals.  The Board then
discussed the proposed terms and conditions of the transaction extensively,
following which the Board adjourned the meeting in order to consider the results
of further negotiations.

     During the evening of September 5, management of CBS and Viacom and their
respective legal advisors continued their negotiations regarding the terms of
the merger agreement and, in particular, the proposed terms regarding the
respective powers of the board of directors, chief executive officer and chief
operating officer.

     On the morning of September 6, the Board of Directors of Viacom met and
reviewed the finalized terms of the proposed transactions.  Following a
discussion, the Viacom Board unanimously approved the merger agreement and the
transactions contemplated thereby.  In the afternoon of September 6, CBS and
Viacom executed the merger agreement, National Amusements executed the voting
agreement and the stockholder agreement, Viacom and Messrs. Redstone and
Karmazin executed their respective employment agreements, and Viacom executed
resignation agreements with Messrs. Dauman and Dooley.

Reasons for the Merger and Board Recommendations

     Viacom

     The Viacom Board carefully considered the terms of the merger and believes
that the merger serves the best interests of Viacom and its shareholders.   As a
result, the Viacom Board declared that the merger agreement was advisable,
unanimously approved the merger agreement and unanimously recommends that the
Viacom shareholders vote "for" the proposal to adopt the merger agreement.

     The Viacom Board considered a number of factors, including those listed
below.   The Viacom Board did not consider it practical, and did not try, to
rank or weigh the importance of each factor, and

                                       55
<PAGE>

different members of the Viacom Board may have given different weight to
different factors. The Viacom Board also considered presentations by, and
consulted with, members of Viacom's management as well as its financial advisors
and outside and inside legal counsel. The list of factors set forth below is not
exhaustive but is believed to include all material factors considered by
Viacom's Board.

     CBS Assets and Relationship with the Existing Businesses of Viacom.  The
     ------------------------------------------------------------------
Viacom Board considered the quality and breadth of the assets of CBS (including
the radio and outdoor advertising assets of Infinity) and its financial
condition, competitive position and prospects for growth.  In particular, the
Board considered the complementary nature of the businesses of CBS and Viacom in
that Viacom is a leader in the cable television programming, motion picture and
television production businesses and CBS is a leader in the television network
distribution, television and radio broadcasting and outdoor advertising
businesses.  The Board recognized the tremendous opportunities for the combined
company to reach large audiences and cross-promote and cross-market its assets
among various distribution outlets.  Similarly, the Board recognized that the
combined company would have greater opportunities to increase its advertising,
licensing and other revenue than either company would on its own.  The Board
also considered potential economies of scale by combining these businesses. The
Board took into account that the combined company would have an increased
dependence on the advertising market, but concluded that the risk of such
dependence was outweighed by the strategic benefits of the transaction.

     Financial Terms.  The Viacom Board considered that the merger of equals
     ---------------
structure, in which no premium would be paid to the shareholders of either
company, would create a company with considerable financial resources.  The
Viacom Board considered the historical trading ranges of Viacom Class B common
stock and CBS common stock as compared with the proposed exchange ratio. The
Viacom Board also considered the fact that the merger would be tax-free to
Viacom's shareholders.  In addition, the Viacom Board considered the pro forma
effect of the proposed transaction on the financial condition and results of the
combined company and the price of CBS as compared with other comparable
companies using various methods of valuation.

     Management and Governance Provisions.  The Viacom Board considered the
     ------------------------------------
experience and accomplishments of Mr. Karmazin and other members of CBS
management and the benefits of Mr. Karmazin's service as President and Chief
Operating Officer and Mr. Redstone's continuing service as Chairman and Chief
Executive Officer to the Viacom shareholders.  The Viacom Board weighed these
benefits against the limitations the proposed governance structure would impose
on its power to manage the combined company by majority vote of the board of the
combined company and concluded that these limitations represented an acceptable
balance of management responsibilities.

     Support of Sumner Redstone.  The Viacom Board considered the fact that
     --------------------------
Viacom's controlling shareholder, National Amusements, which in turn is
controlled by Mr. Redstone, supported the proposed transaction and was prepared
to sign a voting agreement, in which National Amusements would agree to vote its
shares in favor of the proposed transaction.

     Presentation and Opinion of Morgan Stanley.  At its meeting on September 6,
     ------------------------------------------
the Viacom Board considered the financial presentation made to the Viacom Board
on September 5 and the oral opinion rendered by Morgan Stanley on September 5,
subsequently confirmed in writing, that, as of that date, the proposed exchange
ratio was fair to Viacom from a financial point of view.

                                       56
<PAGE>

     Regulatory Matters.  The Viacom Board considered the fact that Viacom might
     ------------------
be required to divest or reduce its interest in United Paramount Network and
Viacom and/or CBS would be required to divest a number of television and radio
stations in the event that current law and regulations were not amended or
waived.  The Viacom Board also considered the ability to obtain other necessary
regulatory approvals.

     Terms, Conditions, Termination Provisions and Termination Fee.  The Viacom
     -------------------------------------------------------------
Board reviewed the representations, warranties, covenants and conditions to
consummation of the proposed transaction and the circumstances under which CBS
would have the right to terminate the merger agreement.  The Viacom Board
considered the fact that the vote of the Viacom shareholders was assured by
reason of the voting agreement to be entered into by National Amusements and
that CBS would have the right to terminate the merger agreement under certain
specified circumstances if there was a superior proposal.  The Viacom Board
considered the circumstances in which a termination fee would be payable in the
event that the merger agreement was terminated. The Viacom Board considered that
there could be no assurance that the acquisition of Outdoor Systems by Infinity
or King World by CBS would be consummated.  The Viacom Board also considered the
fact that the merger would not be conditioned on the completion of the pending
CBS transactions with King World and Outdoor Systems.

     THE VIACOM BOARD UNANIMOUSLY RECOMMENDS THAT THE HOLDERS OF VIACOM CLASS A
COMMON STOCK VOTE "FOR" THE ADOPTION OF THE MERGER AGREEMENT.

      CBS

     Reasons for the Merger.  At its meeting on September 5, 1999, the CBS Board
of Directors determined that the merger is in the best interests of CBS, has
unanimously approved the merger and the merger agreement and unanimously
recommended that CBS shareholders vote to adopt the merger agreement.

     In reaching its decision to approve the merger and the merger agreement and
to recommend that CBS shareholders vote to adopt the merger agreement, the CBS
Board of Directors consulted with senior management and its financial and legal
advisors and considered a number of factors, including the following:

  .     recent trends in the entertainment and media industries and that a
        combination of Viacom, a leading "content provider" in the entertainment
        and media industries, with CBS, a leading distributor and marketer of
        programming, would create an even stronger global competitor in the
        entertainment and media industries;

  .     the opportunity to create the premier seller of advertising in the media
        industry;

  .     the opportunity for synergies and revenue generation through cross-
        promoting and cross-marketing the combined company's film, television,
        radio, theme park, home video, publishing, outdoor advertising and
        Internet businesses;

  .     that the merger would benefit the shareholders of CBS because they would
        participate in the value generated by increases in the opportunities for
        revenue generation through their equity participation in Viacom;

                                       57
<PAGE>

  .     the management and corporate governance arrangements agreed to between
        CBS and Viacom that would provide for a strong management team drawn
        from both companies that would work together to integrate the two
        companies, to realize growth opportunities, to achieve synergistic
        benefits, and to successfully implement strategies of the combined
        company, including that:

        .       the Board of Directors of Viacom would be expanded from ten to
                eighteen directors. The eight additional directors will
                initially be selected from and designated by the Board of
                Directors of CBS and vacancies in this group will be filled
                during the initial three-year term by independent directors
                designated by these eight CBS directors;

        .       Mr. Redstone, the current Chairman and Chief Executive Officer
                of Viacom, would continue to serve as Chairman and Chief
                Executive Officer of Viacom and would be responsible, in
                consultation with the President and Chief Operating Officer, for
                corporate policy and strategy;

        .       Mr. Karmazin, the current President and Chief Executive Officer
                of CBS, would serve as President and Chief Operating Officer of
                the combined company, would directly report to the CEO and
                consult with the CEO on all major decisions and would have
                responsibility for the supervision, coordination and management
                of the combined company's business;

        .       Mr. Karmazin, as President and Chief Operating Officer, would be
                entitled to manage the combined company's business, subject to
                the ability of the combined company's board of directors to take
                action with the approval of at least 14 directors. However, in a
                number of areas the President and Chief Operating Officer would
                not be entitled to act without the approval of, and the combined
                company's board would be entitled to act by, a majority of the
                directors; and

        .       the governance arrangements described above would be in effect
                for a period of three years from the closing of the merger.

  .     the expected qualification of the merger as a tax-free reorganization;

  .     the oral opinion of Evercore, delivered on September 5, 1999, which was
        subsequently confirmed in a written opinion, a copy of which is attached
        as Annex I to this joint proxy statement/prospectus, that, subject to
        the assumptions and limitations contained in that opinion, as of that
        date, the exchange ratio was fair, from a financial point of view, to
        the shareholders of CBS, and the financial presentation made by Evercore
        to the CBS Board of Directors in connection with delivering that
        opinion; and

  .     the terms and conditions of the merger agreement, including the right of
        CBS to consider and negotiate superior proposals, as well as the
        possible effects of the provisions regarding termination fees.

                                       58
<PAGE>

     The CBS Board of Directors also considered other factors relating to the
merger, and their impact on CBS shareholders, including:

  .     the existence of a controlling shareholder of the combined company
        following the merger and the non-voting security to be received by CBS
        shareholders in the merger;

  .     the financial condition, cash flows and results of operations of CBS and
        Viacom, on both a historical and prospective basis;

  .     the historical market prices and trading information with respect to CBS
        common stock and Viacom non-voting Class B common stock, including that
        the Viacom non-voting Class B common stock and the Viacom Class A common
        stock have historically traded at comparable levels;

  .     the impact of the merger on CBS' customers, suppliers and employees;

  .     current industry, economic and market conditions;

  .     the prospects of CBS as an independent company;

  .     the belief that the terms of the merger agreement, including the
        parties' representations, warranties and covenants, and the conditions
        to their respective obligations are reasonable;

  .     the fact that Viacom might be required to divest or reduce its interest
        in United Paramount Network and that Viacom and/or CBS would be required
        to divest a number of television and radio stations in the event that
        current law and regulations were not amended or waived;

  .     the regulatory approvals required to complete the merger and the
        prospects for receiving those approvals;

  .     reports from CBS management and its advisors as to their due diligence
        investigations of Viacom;

  .     the status, timing and tax considerations relating to the potential
        split-off of Blockbuster to the shareholders of Viacom;

  .     the risk that the operations of CBS and Viacom might not be successfully
        integrated;

  .     the risk that, despite the efforts of CBS and Viacom, key management and
        other personnel might not remain employed by the combined company after
        the merger; and

  .     the risk that potential benefits of the merger might not be fully
        realized.

     The CBS Board of Directors believed that the risks to the merger were
outweighed by the potential benefits of the merger.

                                       59
<PAGE>

     The discussion of the information and factors considered by the CBS Board
of Directors in making its decision is not intended to be exhaustive but is
believed to include all material factors considered by the CBS Board of
Directors.  In view of the variety of material factors considered in connection
with its evaluation of the merger, the CBS Board of Directors did not find it
practicable to, and did not, quantify or otherwise assign relative weights to,
the specific factors considered in reaching its determination.  In addition,
individual members of the CBS Board of Directors may have given different weight
to different factors.

     Recommendation of the CBS Board of Directors.  After careful consideration,
the CBS Board of Directors has determined that the merger is in the best
interests of CBS, has unanimously approved the merger and the merger agreement
and unanimously recommends that CBS shareholders vote "for" the adoption of the
merger agreement.

Opinions of Financial Advisors

Viacom

     Under a letter agreement dated as of September 2, 1999, Viacom engaged
Morgan Stanley to act as its financial advisor in connection with a possible
combination with CBS.  The Viacom Board of Directors selected Morgan Stanley to
act as its financial advisor based on Morgan Stanley's qualifications, expertise
and reputation, as well as its knowledge of the business and affairs of Viacom.
On September 5, 1999, Morgan Stanley delivered an oral opinion to the Viacom
Board of Directors which was subsequently confirmed in writing, that, as of that
date, and based upon and subject to the considerations set forth in the written
opinion, the exchange ratio was fair from a financial point of view to Viacom.

     The full text of the opinion, which sets forth, among other things, the
assumptions made, procedures followed, matters considered and limitations on the
scope of the review undertaken by Morgan Stanley in rendering its opinion, is
attached as Annex H to this joint proxy statement/prospectus.  Morgan Stanley's
written opinion is directed to the Viacom Board of Directors and only addresses
the fairness of the exchange ratio to Viacom as of the date of the opinion.
Morgan Stanley's written opinion does not address any other aspect of the merger
and does not constitute a recommendation to any Viacom shareholder as to how to
vote at the Viacom special meeting. The summary of the opinion set forth in this
joint proxy statement/prospectus is qualified in its entirety by reference to
the full text of the opinion attached as Annex H hereto. The following is only a
summary of the Morgan Stanley opinion. Viacom shareholders are urged to, and
should, read the opinion carefully and in its entirety.

     In arriving at Morgan Stanley's opinion, Morgan Stanley, among other
things:

     .  reviewed certain publicly available financial statements and other
        information of Viacom and CBS;

     .  reviewed and analyzed certain internal financial statements and other
        financial and operating data concerning Viacom and CBS prepared by the
        respective managements of Viacom and CBS;

     .  discussed the past and current operations and financial condition and
        the prospects of Viacom and CBS with senior executives of Viacom and CBS
        including their estimates

                                       60
<PAGE>

        of the strategic operating benefits of the merger and analyzed the pro
        forma impact of the merger on Viacom's financial ratios;

     .  reviewed the reported prices and trading activity for the Class B common
        stock of Viacom and the common stock of CBS;

     .  compared the financial performance of Viacom and CBS and the prices and
        trading activity of Viacom and CBS with that of certain other comparable
        publicly traded companies and their securities;

     .  participated in discussions and negotiations among representatives of
        Viacom, CBS and their respective financial and legal advisors;

     .  reviewed the merger agreement and certain related documents; and

     .  performed such other analyses and considered such other factors that
        Morgan Stanley deemed appropriate.

     Morgan Stanley assumed and relied upon without independent verification the
accuracy and completeness of the information it reviewed for the purposes of its
opinion.  With respect to the financial projections, Morgan Stanley assumed that
they had been reasonably prepared on bases reflecting the best currently
available estimates and judgments of the future financial performance of Viacom
and CBS.  Morgan Stanley has not made any independent valuation or appraisal of
the assets or liabilities of Viacom and CBS, nor has Morgan Stanley been
furnished with any such appraisals. Morgan Stanley has assumed that the merger
will be consummated in accordance with the terms set forth in the merger
agreement.  Morgan Stanley's opinion is necessarily based on economic, market
and other conditions as in effect on, and the information made available to it
as of, the date of its opinion.

     The following is a brief description of certain analyses performed by
Morgan Stanley in connection with its oral opinion and the preparation of its
written opinion letter.  These summaries of financial analyses include
information presented in tabular format.  In order to understand the financial
analysis used by Morgan Stanley, the tables must be read together with the text
of each summary.  The tables alone do not constitute a complete description of
the financial analyses.

     Historical Public Market Trading Value.  Morgan Stanley reviewed the stock
     --------------------------------------
price performance of CBS based on an analysis of the historical closing prices
and trading volumes for the one year period beginning September 3, 1998 and
ending September 3, 1999.  The following table lists the low, average and high
daily closing prices of shares of CBS common stock for the periods indicated.


                     Historical CBS Common Stock Prices
                     ----------------------------------
                        Low        Average      High
                     ----------  -----------  ---------

Last One Year            $18.00       $36.90     $50.44
Last Nine Months          26.75        40.93      50.44
Last Six Months           35.38        43.98      50.44
Last Three Months         40.56        45.07      50.44

                                       61
<PAGE>

                        Low        Average      High
                     ----------  -----------  ---------

Last One Month            44.13        46.71      50.44
Last Two Weeks            45.88        47.81      50.44


      Comparative Stock Price Performance.  As part of its analysis, Morgan
      -----------------------------------
Stanley reviewed the stock price performance of Viacom Class B common stock and
CBS common stock and compared this performance with the following peer groups:

Viacom Peer Group                          CBS Peer Group
- -------------------------------  ----------------------------------


The Walt Disney Company          A.H. Belo Corporation
Fox Entertainment Group, Inc.    Clear Channel Communications, Inc.
The Seagram Company Ltd.         Hearst-Argyle Television, Inc.
Time Warner Inc.                 Sinclair Broadcast Group, Inc.
                                 Young Broadcasting Inc.


     Morgan Stanley observed that over the one year period from September 3,
1998 to September 3, 1999, the closing market prices appreciated as set forth
below:

                                                 % Total Appreciation
                                                 ---------------------


Viacom                                                     56%
CBS                                                        80
Viacom Peer Group                                          23
(equity market capitalization-weighted index)
CBS Peer Group                                             42
(equity market capitalization-weighted index)


     No company used in the stock price performance comparison is identical to
Viacom or CBS. In evaluating the stock price performance comparison, Morgan
Stanley made judgements and assumptions with regard to industry performance,
business, economic, market and financial conditions and other matters, many of
which are beyond the control of Viacom and CBS, e.g. the impact of competition
on Viacom or CBS and the industry, industry growth and the absence of material
adverse change in the financial condition and prospects of Viacom or CBS or the
industry or in the financial markets.

     Securities Research Analysts' Future Price Targets.  Morgan Stanley
     --------------------------------------------------
reviewed and analyzed future public market trading price targets for Viacom
Class B common stock and CBS common stock prepared and published by securities
research analysts during the period from May 5, 1999 to August 18, 1999 for
Viacom and May 26, 1999 to August 20, 1999 for CBS.  Based upon discussions with
senior executives of Viacom and CBS, these analysts' projections were viewed by
Morgan Stanley as being representative of the future prospects of Viacom and
CBS.  These targets reflected each analyst's

                                       62
<PAGE>

estimate of the future public market trading price of Viacom Class B common
stock and CBS common stock at the end of the particular period considered for
each estimate. Applying equity discount rates of 13.4% for Viacom and 12.8% for
CBS, Morgan Stanley arrived at a range of present values as of September 3, 1999
of these targets as set forth below:

                                             Present Value Range
                                             -------------------
                                               Low       High
                                             --------  ---------


Viacom Public Market Trading Price Target         $42        $50
CBS Public Market Trading Price Target             46         53

     Morgan Stanley noted that the public market trading price targets published
by the securities research analysts do not reflect current market trading prices
and that these estimates are subject to uncertainties, including the future
financial performance of Viacom and CBS and future financial market conditions.

      Peer Group Comparison.  Morgan Stanley compared financial information of
      ---------------------
Viacom and CBS with corresponding financial information for their respective
peer groups.

     Morgan Stanley analyzed, among other things, for each company, the current
aggregate value, i.e., equity value adjusted for capital structure, expressed as
a multiple of earnings before interest, taxes, depreciation and amortization
expense, or EBITDA.

     As of June 30, 1999 and based on estimates of EBITDA taken from selected
securities research analysts, the statistics derived from this analysis are set
forth below:

<TABLE>
<CAPTION>
                                     Viacom Peer Group           CBS Peer Group
                                ---------------------------  ----------------------
                        Viacom  Median  High    Low    CBS   Median   High     Low
                        ------  ------  -----  -----  -----  ------  -------  -----
1999 EBITDA Multiple    17.1x   15.7x   19.0x  14.4x  22.7x  11.7x    25.7x   8.8x
<S>                     <C>     <C>     <C>    <C>    <C>    <C>     <C>      <C>
2000 EBITDA Multiple      14.5    13.3   16.6   12.7   19.6    10.0     22.6    8.1
</TABLE>

     No company used in the peer group comparison is identical to Viacom or CBS.
In evaluating the peer group companies, Morgan Stanley made judgements and
assumptions with regard to industry performance, business, economic, market and
financial conditions and other matters, many of which are beyond the control of
Viacom and CBS, such as the impact of competition on Viacom or CBS and the
industry, industry growth and the absence of material adverse change in the
financial condition and prospects of Viacom or CBS or the industry or in the
financial market in general.  Mathematical analysis, such as determining the
average or median, is not in itself a meaningful method of using peer group
data.

      Discounted Cash Flow Analysis.  Morgan Stanley performed a discounted cash
      -----------------------------
flow analysis of CBS' business.  A discounted cash flow analysis involves an
analysis of the present value of projected cash flows and a terminal value using
discount rates and terminal year free cash flow perpetual growth rates as
indicated below.  Morgan Stanley analyzed CBS' business using a forecast for the
period beginning January 1, 1999 and ending December 31, 2003, based on
estimates published by securities research analysts.  Based upon discussions
with senior executives of CBS, these analysts' projections were viewed by Morgan
Stanley as being representative of the future prospects of CBS. Morgan

                                       63
<PAGE>

Stanley estimated the CBS common stock discounted cash flow value by using a
discount rate of 10% and a perpetual growth rate applied to 2003 free cash flow
ranging from 4.5% to 5.5%. This analysis yielded a range of per share values for
CBS common stock of approximately $45 to $54.

     Morgan Stanley also performed a discounted cash flow analysis of Viacom's
business.  Morgan Stanley analyzed Viacom's business using a forecast for the
period beginning January 1, 1999 and ending December 31, 2003, based on
estimates published by securities research analysts.  Based upon discussions
with senior executives of Viacom, these analysts' projections were viewed by
Morgan Stanley as being representative of the future prospects of Viacom.
Morgan Stanley estimated the Viacom Class B common stock discounted cash flow
value by using a discount rate of 10% and terminal multiples of estimated 2003
EBITDA ranging from 13.0x to 15.0x.  This analysis yielded a range of per share
values for Viacom Class B common stock of approximately $39 to $45.

     Sum-of-the-Parts Analysis.  Morgan Stanley performed a sum-of-the-parts
     -------------------------
analysis of CBS' business.  A sum-of-the-parts analysis involves a separate
valuation of each of CBS' core businesses. The valuation methodology applied to
each component is set forth below:

Component                                     Valuation Methodology
- ---------                                      --------------------

Infinity Broadcasting Corporation    Market Value of CBS' 700 million shares
Television Assets (a)                13x-15x 2000E EBITDA
Cable Programming (CMT/TNN)          17x-19x 2000E EBITDA
King World Productions, Inc.         CBS net purchase price
Internet Holdings                    Morgan Stanley equity research estimate

________________
(a)  Includes an analysis of CBS' Television Station group and Television
     Network which were each analyzed as separate components.

This analysis yielded a range of per share values for CBS common stock of
approximately $42-$47.

      Relative Contribution Analysis.  Morgan Stanley compared pro forma
      ------------------------------
contribution of each of Viacom and CBS, based on securities research analyst
estimates, to the resultant combined company assuming completion of the merger.
Morgan Stanley adjusted these statistics to reflect each company's respective
capital structure and then compared them to the pro forma ownership by Viacom
shareholders of the common stock of the combined company, implied by the
exchange ratio, of approximately 46%.  Morgan Stanley performed this analysis
with and without Blockbuster as part of Viacom to reflect Viacom's previously
announced intention to split-off Blockbuster to the Viacom shareholders and as a
consequence, deconsolidate Blockbuster for accounting purposes.  The results in
terms of both EBITDA and after tax cash flow or ATCF, are set forth below:

                 Viacom Equity Contribution
                ----------------------------
                    With          Without
                 Blockbuster    Blockbuster
                -------------  -------------


2000E EBITDA            55.3%          46.9%
2001E EBITDA            54.5           45.9

                                       64
<PAGE>

                    With          Without
                 Blockbuster    Blockbuster
                -------------  -------------


2002E EBITDA            53.1           44.9
2000E ATCF              55.5           44.5
2001E ATCF              56.2           45.4
2002E ATCF              55.2           45.1


      Historical Exchange Ratio Analysis.  Morgan Stanley compared the exchange
      ----------------------------------
ratio of 1.085 to the ratio of the closing market prices of Viacom Class B
common stock and CBS common stock on September 3, 1999.  Morgan Stanley also
compared this ratio to selected average historical ratios of the closing market
prices of CBS common stock to Viacom Class B common stock over various periods
ending September 3, 1999.  Morgan Stanley then calculated the premiums
represented by the exchange ratio over these ratios.  The results of this
analysis are set forth below:

                                      % Premium/
                      Market        (Discount) to
                    Price Ratio  Market Price Ratio
                    -----------  ------------------


Current (9/3/99)       1.086x            (0.1)%
Prior 5 Days           1.109             (2.2)
Prior 10 Days          1.123             (3.4)
Prior 20 Days          1.116             (2.8)
Prior 30 Days          1.097             (1.1)
Prior 45 Days          1.071              1.3
Prior 60 Days          1.064              2.0
Last 6 Months          1.043              4.0


     The preparation of a fairness opinion is a complex process and is not
necessarily susceptible to a partial analysis or summary description.  In
arriving at its opinion, Morgan Stanley considered the results of all of its
analyses as a whole and did not attribute any particular weight to any
particular analysis or factor considered by it.  Furthermore, selecting any
portion of Morgan Stanley's analyses, without considering all analyses, would
create an incomplete view of the process underlying the Morgan Stanley opinion.
In addition, Morgan Stanley may have deemed various assumptions more or less
probable than other assumptions, so that the ranges of valuations resulting from
any particular analysis described above should not be taken to be Morgan
Stanley's view of the actual value of Viacom or CBS.

     In performing its analysis, Morgan Stanley made numerous assumptions with
respect to industry performance, general business and economic conditions and
other matters, many of which are beyond the control of Viacom or CBS.  Any
estimates contained in the analyses performed by Morgan Stanley are not
necessarily indicative of actual values, which may be significantly more or less
favorable than suggested by such estimates.  The analyses performed were
prepared solely as a part of Morgan Stanley's analysis of the fairness of the
exchange ratio to Viacom in connection with the delivery of Morgan Stanley's
opinion to Viacom's Board of Directors.  The analyses do not purport to

                                       65
<PAGE>

be appraisals or to reflect the prices at which Viacom Class B common stock or
CBS common stock might actually trade.

     The exchange ratio was determined through arm's-length negotiations between
Viacom and CBS and was approved by the Viacom Board of Directors.  Morgan
Stanley's opinion to the Viacom Board of Directors was one of many factors taken
into consideration by the Viacom Board of Directors in making its determination
to approve the merger. Consequently, the Morgan Stanley analyses described above
should not be viewed as determinative of the opinion of the Viacom Board of
Directors with respect to the value of CBS or of whether the Viacom Board of
Directors would have been willing to agree to different consideration.

     Morgan Stanley is an internationally recognized investment banking and
advisory firm. Morgan Stanley, as part of its investment banking business, is
continuously engaged in the valuation of businesses and securities in connection
with mergers and acquisitions, negotiated underwritings, competitive biddings,
secondary distributions of listed and unlisted securities, private placements
and valuations for corporate and other purposes.  In the ordinary course of
Morgan Stanley's trading, brokerage and financing activities, Morgan Stanley or
its affiliates may at any time hold long or short positions, may trade, make a
market or otherwise effect transactions, for its own account or for the accounts
of customers, in the securities of Viacom or CBS.

     Pursuant to an engagement letter dated September 2, 1999, Viacom has agreed
to pay Morgan Stanley a $10 million fee ($7.5 million of which is contingent
upon closing of the merger), for advisory services rendered and to reimburse
Morgan Stanley for reasonable expenses incurred.  Viacom has also agreed to
indemnify Morgan Stanley and its affiliates, their respective directors,
officers, agents and employees and each person, if any, controlling Morgan
Stanley or any of its affiliates, against certain liabilities and expenses,
including certain liabilities under the federal securities laws, arising out of
Morgan Stanley's engagement.  In the past, Morgan Stanley and its affiliates
have provided financial advisory and financing services for Viacom and CBS and
have received fees for the rendering of these services.

CBS

     CBS retained Evercore to act as financial advisor to CBS and to render a
fairness opinion, from a financial point of view, in connection with the merger.
On September 5, 1999, Evercore delivered its oral opinion to the CBS Board of
Directors which was subsequently confirmed in a written opinion, that, as of
that date, the exchange ratio was fair, from a financial point of view, to the
shareholders of CBS.

     The full text of the written opinion of Evercore is set forth as Annex I to
this joint proxy statement/prospectus and describes the assumptions made,
general procedures followed, matters considered and limits on the review
undertaken.  Evercore's opinion is directed only to whether the exchange ratio
is fair, from a financial point of view, to the holders of CBS common stock and
does not constitute a recommendation of the merger over other courses of action
that may be available to CBS or constitute a recommendation to any CBS
shareholder as to how that shareholder should vote with respect to the merger.
The summary of the opinion of Evercore set forth in this joint proxy
statement/prospectus is qualified in its entirety by reference to the full text
of such opinion, attached as Annex I.  Shareholders of CBS are urged to read the
opinion carefully and in its entirety.

     In connection with rendering its opinion, Evercore has, among other things:

                                       66
<PAGE>

     .  analyzed various publicly available financial statements and other
        information relating to CBS and Viacom;

     .  analyzed various internal financial statements and other non-public
        financial and operating data concerning CBS, which were prepared by and
        furnished to Evercore or reviewed for Evercore by the management of CBS,
        and concerning Viacom, which were prepared by and furnished to Evercore
        or reviewed for Evercore by the management of Viacom;

     .  analyzed various financial projections for 1999 concerning CBS, which
        were prepared by the management of CBS, and concerning Viacom, which
        were prepared by the management of Viacom;

     .  discussed the past and current operations and financial condition and
        the prospects of CBS with the management of CBS;

     .  discussed the past and current operations and financial condition and
        the prospects of Viacom with the management of Viacom;

     .  reviewed the reported prices and trading activity of the CBS common
        stock and Viacom Class B common stock;

     .  compared the market valuation and financial performance of CBS and
        Viacom with that of several other comparable publicly traded companies;

     .  reviewed the financial terms to the extent available of certain
        comparable acquisition transactions;

     .  participated in discussions and negotiations among representatives of
        CBS, Viacom, and their respective financial and legal advisers;

     .  reviewed the merger agreement and the related exhibits and schedules;

     .  reviewed various information concerning cost savings and combination
        benefits expected to result from the merger that was furnished to
        Evercore or reviewed for Evercore by the managements of CBS and Viacom;
        and

     .  performed other analyses and examinations and considered other factors
        as Evercore in its sole judgment deemed appropriate.

     For purposes of its analysis and opinion, Evercore assumed and relied,
without independent verification, upon the accuracy and completeness of the
information reviewed by Evercore or reviewed for Evercore.  With respect to the
financial projections of CBS and Viacom for 1999 which were furnished to
Evercore by the managements of CBS and Viacom, and certain analyses concerning
the potential cost savings and combination benefits expected to result from the
merger which were reviewed for Evercore by the management of CBS, Evercore
assumed that they were reasonably prepared on bases reflecting the best
currently available estimates and good faith judgments of the future
competitive, operating and regulatory environments and related financial
performance of CBS and Viacom, respectively.  Evercore did not make nor assume
any responsibility for making any independent valuation or appraisal of the
assets or liabilities of CBS or Viacom, nor was Evercore furnished with any such
appraisals.  Evercore's opinion was necessarily based on economic, market

                                       67
<PAGE>

and other conditions as in effect on, and the information and agreements made
available to Evercore as of the date of its opinion. Evercore assumed, with the
approval of CBS, that the merger would qualify as a tax-free reorganization
within the meaning of Section 368 of the Internal Revenue Code of 1986, as
amended. Evercore's opinion did not address CBS' underlying business decision to
effect the merger nor constitute a recommendation to any CBS shareholder as to
how that shareholder should vote with respect to the merger. Furthermore,
Evercore expressed no opinion as to the price or range of prices at which the
shares of Viacom Class B common stock would trade at any future time.

     For purposes of its analyses, Evercore primarily relied upon publicly
available Wall Street research estimates for each company, and subsequently
compared those estimates to internal budgets for 1999 for each company to
confirm the reasonableness of the analysts' expectations.

     For purposes of rendering its opinion, Evercore assumed, in all respects
material to its analysis, that the representations and warranties of each party
contained in the merger agreement were true and correct, that each party would
perform all the covenants and agreements required under the merger agreement,
and that all conditions to the consummation of the merger would be satisfied
without being waived.

     In connection with a presentation to the CBS Board on September 5, 1999,
Evercore advised CBS' Board that, in evaluating the exchange ratio, Evercore had
performed a variety of financial analyses with respect to CBS and Viacom, all as
summarized below:

     Historical Exchange Ratio Analysis.  Evercore reviewed the daily closing
     ----------------------------------
prices of CBS common stock and Viacom Class B common stock to determine the
implied exchange ratio based upon the relative prices of CBS common stock and
Viacom Class B common stock for each considered time period.  Evercore analyzed
the implied exchange ratio between CBS common stock and Viacom Class B common
stock for various time periods between January 2, 1998 and September 3, 1999.
Evercore noted that the agreed to exchange ratio of 1.085 was within the range
of historical implied exchange ratios in the periods examined.  The historical
implied exchange ratios for the periods are shown below:

<TABLE>
<CAPTION>
                                               CBS        Viacom     Implied
                                           Share Price    Class B    Exchange
                                           -----------  Share Price   Ratio
                                                        -----------  --------

<S>                                        <C>          <C>          <C>
September 3, 1999                               $48.94       $45.06    1.0860

10-Day Average                                   47.81        42.59    1.1225
20-Day Average                                   46.71        41.86    1.1159

30-Day Average                                   46.15        42.10    1.0964

45-Day Average                                   45.86        42.91    1.0688

60-Day Average                                   45.07        42.43    1.0621

90-Day Average                                   44.63        41.73    1.0695


1999 Year-to-Date Avg. (through 9/3/99)          41.57        42.11    0.9871

1998 Full-Year Average                           30.33        28.64    1.0591


Merger Exchange Ratio                                                  1.0850
</TABLE>

                                       68
<PAGE>

     Contribution Analysis.  Evercore analyzed the relative contributions of CBS
     ---------------------
and Viacom to the pro forma combined company with respect to revenues,
consolidated EBITDA, EBITDA less minority interest (adjusted to exclude minority
interests in the EBITDA of Infinity for CBS and in Blockbuster for Viacom),
equity market value, and enterprise value for the projected fiscal years ending
in 1999 and 2000.  Evercore also reviewed the pro forma ownership of the
combined company, taking into account each company's outstanding options and
warrants on common stock treated under the treasury stock method.

<TABLE>
<CAPTION>
                                           FY 1999E            FY 2000E
                                     --------------------  ----------------
Contribution Percentage:               CBS       Viacom     CBS    Viacom
                                     --------  ----------  -----  ---------
<S>                                  <C>       <C>         <C>    <C>
    Revenue                             39.9%    60.1%     39.5%      60.5%
    Consolidated EBITDA                 52.0%    48.0%     52.2%      47.8%
    EBITDA Less Min. Int. (a)           47.2%    52.8%     47.6%      52.4%

    Equity Market Value                 54.7%    45.3%
    Enterprise Value                    53.0%    47.0%

Pro Forma Economic Ownership Based on Exchange Ratio:

    CBS                                 54.6%
    Viacom                              45.4%
</TABLE>


(a) Excludes 35.8% minority interest in Infinity for CBS and 17.7% minority
    interest in Blockbuster for Viacom.

     Pro Forma Merger Analysis.  Primarily relying on Wall Street research
     -------------------------
estimates, Evercore analyzed the potential pro forma effects of the merger on
CBS' projected free cash flow per share based on various assumptions regarding
the merger.  For the purposes of this analysis, free cash flow was defined as
EBITDA less interest expense less cash taxes less capital expenditures.  This
analysis indicated that the merger would initially be dilutive to CBS' free cash
flow per share.  The actual results achieved by the combined company may vary
from projected results and the variations may be material.

     Review of Selected Merger-of-Equals Transactions.  Evercore reviewed the
     ------------------------------------------------
financial terms, to the extent publicly available, of nine selected merger-of-
equals transactions.  Evercore reviewed the premiums implied in the selected
merger-of-equals transactions relative to market value contributions, assuming a
constant market capitalization based on closing stock prices prior to the
announcement of such transactions.

     Evercore noted that, if the merger had closed on September 3, 1999,
utilizing the Viacom closing stock price on September 3, 1999, and assuming the
exchange ratio of 1.085, CBS shareholders would have received Viacom Class B
common stock having a market value representing a discount of 0.1% to the CBS
common stock September 3, 1999 closing price.  Evercore compared this implied
discount to the implied premiums/discounts for similar periods prior to public
announcement in the following comparable merger-of-equals transactions:

                                       69
<PAGE>

     .    Honeywell Inc. / AlliedSignal Inc.;

     .    GTE Corporation / Bell Atlantic Corporation;

     .    Wells Fargo & Company / Norwest Corporation;

     .    Monsanto Company / American Home Products Corporation;

     .    BankAmerica Corporation / NationsBank Corp.;

     .    First Chicago NBD Corporation / Banc One Corporation;

     .    Citicorp / Travelers Group, Inc.;

     .    HFS Incorporated / CUC International Inc.; and

     .    NYNEX Corporation/ Bell Atlantic Corporation.

     In each of the above transactions, the shareholders of the first-named
company were to receive shares of the second-named company.  Evercore considered
these merger-of-equals transactions to be reasonably similar to the merger, but
none of these precedents is identical to the merger.

     The following table presents the premiums or discounts contemplated in the
merger and implied in these other transactions, from the perspective of the
shareholders of the first-named company, compared with the previous trading day
closing price per share:

<TABLE>
<CAPTION>
                                              Premium to Prior Day Closing Price
                                              -----------------------------------

<S>                                           <C>
CBS/Viacom                                                       -0.1%

Precedent "Merger-of-Equals" Transactions:

   Average                                                        3.5%
   Median                                                         5.5%
   Low                                                           -5.8%
   High                                                           9.3%
</TABLE>


     Selected Comparable Company Analysis.  Evercore compared selected
     ------------------------------------
financial, market and operating information of CBS with corresponding data of
other selected publicly traded companies with similar operations to those of
CBS.  Evercore compared the adjusted enterprise value to adjusted EBITDA
multiples of the consolidated CBS Corporation to a selected group of publicly
traded radio broadcasting and outdoor advertising companies.  Adjusted
enterprise value for a given company was defined as total enterprise value
(equity market value plus total debt and preferred stock, less cash and cash
equivalents) less the value of unconsolidated stakes in other companies, less
the value of segments within the company that trade at multiples that are
significantly different from the rest of the company, and plus the value of any
minority stakes in consolidated businesses.  Adjusted EBITDA for a given company
was defined as EBITDA less the EBITDA contributed by segments within the company
that trade at multiples that are significantly different from the rest of the
company.  This selected group of publicly traded radio broadcasting and outdoor
advertising companies was comprised of:

                                       70
<PAGE>

     .    AM/FM Inc.;

     .    Citadel Communications Corporation;

     .    Clear Channel Communications, Inc.;

     .    Cox Radio, Inc.;

     .    Cumulus Media, Inc.;

     .    Emmis Communications Corporation;

     .    Entercom Communications Corp.;

     .    Hispanic Broadcasting Corporation;

     .    Infinity Broadcasting Corporation;

     .    Radio One, Inc.; and

     .    Saga Communications, Inc.

     Evercore selected these radio broadcasting and outdoor advertising
companies because Evercore considered them to have operations similar to the
operations of CBS in this business segment. All multiples were calculated based
on closing prices as of September 3, 1999.  For the comparable companies, EBITDA
projections were based on publicly available Wall Street research estimates.
Evercore noted that the closing price of CBS common stock on September 3, 1999
of $48.94 represented a multiple of EBITDA that was within the range found for
the CBS-comparable companies set forth above.  To illustrate, Evercore
highlighted the following multiples of adjusted enterprise value to adjusted
1999E and 2000E EBITDA:

<TABLE>
<CAPTION>
                                    Adj. Enterprise Value to Adj. EBITDA
                                    ------------------------------------
                                        FY 1999E           FY 2000E
                                    -----------------  -----------------
<S>                                 <C>                <C>
CBS Consolidated                          20.8x              18.2x
Radio & Outdoor Advertising (a):
   Average                                22.5x              19.5x
   Low                                    13.4x              12.0x
   High                                   28.7x              24.2x
</TABLE>


(a)  The analysis of Radio & Outdoor comparables excludes Hispanic Broadcasting
     because its multiples were not in line with other comparables.

     Evercore compared the adjusted enterprise value to adjusted EBITDA
multiples of CBS, excluding its majority-owned stake in Infinity, to a selected
group of publicly traded television broadcasting companies.  Evercore looked at
CBS excluding Infinity due to the fact that many Wall Street research analysts
also analyze CBS in this manner in order to isolate the implied valuation of the
non-radio/outdoor advertising assets.  In doing so, Evercore excluded the
financial impact of Infinity on the EBITDA of CBS.  Evercore also reduced the
enterprise value of CBS used in the calculation by an amount equal to the market
value of Infinity common stock held by CBS plus Infinity's net debt balance.

                                       71
<PAGE>

     The group of publicly traded television broadcast companies selected for
this comparative analysis was comprised of:

     .    A.H. Belo Corporation;

     .    Granite Broadcasting Corporation;

     .    Hearst-Argyle Television, Inc.;

     .    Paxson Communications Corporation;

     .    Sinclair Broadcasting Group, Inc.;

     .    United Television, Inc.; and

     .    Young Broadcasting, Inc.

     Evercore selected these television broadcasting companies because Evercore
considered them to have operations similar to the operations of CBS, excluding
Infinity, in this business segment.  All multiples were calculated based on
closing prices as of September 3, 1999.  For the comparable companies, EBITDA
projections were based on publicly available Wall Street research estimates.
Evercore highlighted the following multiples of adjusted enterprise value to
adjusted 1999E and 2000E EBITDA:

<TABLE>
<CAPTION>
                                Adj. Enterprise Value to Adj. EBITDA
                                ------------------------------------
                                    FY 1999E           FY 2000E
                                -----------------  -----------------
<S>                             <C>                <C>
CBS Excluding Infinity (a)            19.2x              16.8x
Television Broadcasting (b):

   Average                            12.0x              10.9x

   Low                                 9.0x               7.9x

   High                               14.2x              12.9x
</TABLE>


(a)  Also excludes TV network and Internet assets.

(b)  The analysis of Television Broadcasting comparables excludes Paxson
     Communications because its multiples were not in line with other
     comparables.

     Evercore also compared certain financial, market and operating information
of Viacom with corresponding data of other selected publicly traded companies
with similar operations.  Evercore compared the adjusted enterprise value to
adjusted EBITDA multiples of Viacom to a selected group of publicly traded
entertainment companies.  The selected group of publicly traded entertainment
companies was comprised of:

     .    The Walt Disney Company;

     .    The News Corporation Limited;

     .    Time Warner Inc.;

     .    The Seagram Company Ltd.;

                                       72
<PAGE>

     .    Fox Entertainment Group, Inc.; and

     .    USA Networks, Inc.

     Evercore selected these entertainment companies because Evercore considered
them to have operations similar to the operations of Viacom.  All multiples were
calculated based on closing prices as of September 3, 1999.  For the comparable
companies, EBITDA projections were based on publicly available Wall Street
research estimates.  Evercore noted that the closing price of Viacom Class B
common stock on September 3, 1999 of $45.06 represented a multiple of Adjusted
EBITDA that was within the range found for the Viacom-comparable companies set
forth above.  To illustrate, Evercore highlighted the following multiples of
adjusted enterprise value to adjusted 1999E and 2000E EBITDA:

<TABLE>
<CAPTION>
                                       Adj. Enterprise Value to Adj. EBITDA
                                       ------------------------------------
                                           FY 1999E           FY 2000E
                                       -----------------  -----------------
<S>                                    <C>                <C>
Viacom (a)                                   20.2x              17.5x
Entertainment Comparable Firms (b):

   Average                                   16.3x              13.8x

   Low                                       12.2x              9.8x

   High                                      20.8x              17.8x
</TABLE>


(a)  Excludes Blockbuster.

(b)  The analysis of Entertainment comparables excludes News Corp. due to its
     relatively high concentration on publishing operations.

     No company used in the comparable company analyses summarized above is
identical to CBS or Viacom.  Accordingly, any analysis of the fairness of the
consideration to be received by the holders of CBS common stock in the merger
involves complex considerations and judgements concerning differences in the
potential financial and operating characteristics of the comparable companies
and other factors in relation to the trading values of the comparable companies.

     Selected Comparable Transaction Analysis.  Evercore reviewed the implied
     ----------------------------------------
transaction multiples paid in selected comparable merger and acquisition
transactions and compared these multiples to the multiples implied by the
consideration paid to CBS shareholders in the merger.  Evercore noted that, if
the merger had closed on September 3, 1999, utilizing the closing price of
Viacom Class B common stock on September 3, 1999 of $45.06, and assuming the
exchange ratio of 1.085, CBS shareholders would have received Viacom Class B
common stock having a market value equal to $48.89 per each share of CBS common
stock owned.  Evercore analyzed the adjusted enterprise value of CBS, derived
from this implied price per share, as a multiple of adjusted EBITDA and compared
this multiple to multiples of EBITDA paid in selected mergers and acquisitions
of radio broadcasting and outdoor advertising companies.  The following
selection of mergers and acquisitions of radio broadcasting and outdoor
advertising companies was used for purposes of this analysis:

     .    Chancellor Media Outdoor Corporation / Lamar Advertising Co.

     .    Outdoor Systems, Inc. / Infinity Broadcasting Corporation

     .    Jacor Communications, Inc. / Clear Channel Communications, Inc.

                                       73
<PAGE>

     .    Capstar Broadcasting Corporation / Chancellor Media Corp.

     .    Universal Outdoor Holdings, Inc. / Clear Channel Communications, Inc.

     .    American Radio Systems Corporation / CBS Corporation

     .    SFX Broadcasting, Inc. / Capstar Broadcasting Corporation

     .    Viacom Radio / Evergreen Media Corp.

     .    Chancellor Media Corp. / Evergreen Media Corp.

     .    Infinity Broadcasting Corporation / Westinghouse Electric Corporation

     Evercore also performed this analysis for the following selection of
mergers and acquisitions involving television broadcasting companies:

     .    Gaylord Entertainment / CBS Corporation

     .    Kelly Broadcasting / Hearst-Argyle Television, Inc.

     .    Pulitzer Publishing Company (TV & Radio) / Hearst-Argyle Television,
          Inc.

     .    Sullivan Broadcasting / Sinclair Broadcast Group, Inc.

     .    LIN Television Corporation / Hicks Muse Tate & Furst

     .    Heritage Media Corporation / The News Corporation Limited

     .    Heritage Media Corporation / Sinclair Broadcast Group, Inc.

     .    A.H. Belo Corporation / Scripps Howard

     .    Argyle TV / Hearst-Argyle Television, Inc.

     .    Providence Journal Company / A.H. Belo Corporation

     .    First Media Television, L.P. / Meredith Corporation

     .    New World Communications Group, Inc. / The News Corporation Limited

     .    Renaissance Communications Corporation / Tribune Company

     .    Multimedia, Inc. / Gannett Co., Inc.

     Evercore selected these transactions because they involved companies in
business segments in which CBS has operations.  Evercore noted that the multiple
implied by the merger as of September 3, 1999 is within the range of multiples
paid in comparable transactions, and, therefore, that these analyses of
multiples supported a fairness determination concerning the merger.

                                         Transaction Value to EBITDA
                                         ---------------------------

Merger Offer for CBS
       CBS Consolidated                             20.8x

                                       74
<PAGE>

   CBS Excluding Infinity                           19.2x

Radio & Outdoor Transactions:
   Average                                          17.7x
   Low                                              14.2x
   High                                             21.0x
Television Broadcasting Transactions:
   Average                                          14.4x
   Low                                               9.8x
   High                                             23.3x


     Additionally, Evercore analyzed the adjusted enterprise value of Viacom as
a multiple of adjusted EBITDA and compared this multiple to multiples of EBITDA
paid in a selection of mergers and acquisitions of entertainment companies.  The
following selection of mergers and acquisitions of entertainment companies was
used for purposes of this analysis:

     .    PolyGram N.V. / The Seagram Company Ltd.

     .    Metro-Goldwyn-Mayer Inc. / Management

     .    Turner Broadcasting System, Inc. / Time Warner Inc.

     .    CBS, Inc. / Westinghouse Electric Corp.

     .    Capital Cities / ABC, Inc. / The Walt Disney Company

     .    MCA, Inc. / The Seagram Company Ltd.

     .    Blockbuster Entertainment Corporation / Viacom Inc.

     .    Paramount Communications Inc. / Viacom Inc.

     Evercore selected these transactions because they involved companies in
business segments in which Viacom has operations.  Evercore noted that the
multiple implied by Viacom's closing price on September 3, 1999 is within the
range of multiples paid in comparable transactions.

                                   Transaction Value to EBITDA
                                   ---------------------------
Viacom (a)                                    20.2x
Entertainment Transactions (b):
   Average                                    15.9x
   Low                                        12.3x
   High                                       21.0x



(a)  Excludes Blockbuster.

(b)  The analysis of Entertainment transactions excludes Blockbuster
     Entertainment Corporation/Viacom Inc. transaction due to the retail nature
     of Blockbuster's business.

                                       75
<PAGE>

     No transaction used in the comparable transaction analyses summarized above
is identical to the merger.  Accordingly, any analysis of the fairness of the
consideration to be received by the holders of CBS common stock in the merger
involves complex considerations and judgments concerning differences in the
potential financial and operating characteristics of the comparable transactions
and other factors in relation to the acquisition values of the comparable
companies.

     Discounted Cash Flow Analysis.  Evercore estimated the present value of the
     -----------------------------
future stand-alone, unlevered free cash flows that could be produced by CBS. The
net present value ranges were estimated by applying one-year forward terminal
value multiples ranging from 16.0x to 18.0x 2004E EBITDA and discount rates
ranging from 11.0% to 14.0%. This analysis indicated a value per share of CBS
common stock ranging from approximately $42.03 to $52.60, as compared to the per
share price of $48.89 for CBS common stock that was implied by the exchange
ratio as of September 3, 1999.

     Evercore also performed a discounted cash flow analysis for Viacom.
Evercore estimated the present value of the future stand-alone, unlevered free
cash flows that could be produced by Viacom. The net present value ranges were
estimated by applying one-year forward terminal value multiples ranging from
16.0x to 18.0x 2004E EBITDA and discount rates ranging from 11.0% to 14.0%. This
analysis indicated a value per share of Viacom Class B common stock ranging from
approximately $42.80 to $53.18, as compared to the per share price for Viacom
Class B common stock of $45.06 on September 3, 1999.

     Sum-of-the-Parts Analysis.  Evercore estimated the value of CBS by
     -------------------------
calculating the implied value of its different components at different multiples
and then adding these values to arrive at a value for the consolidated entity.
For this sum-of-the-parts valuation, Evercore valued CBS' syndication business
at a range of 10.0x to 12.0x 2000E EBITDA, CBS' television segment at a fixed
amount for the network and at a range of 13.0x to 15.0x 2000E EBITDA for its
television stations, and CBS' cable network division at a range of 16.0x to
18.0x 2000E EBITDA.  The remaining businesses of CBS (corporate overhead,
Internet assets, and CBS' stake in Infinity) were valued at fixed amounts. The
sum-of-the parts valuation yielded a CBS common stock valuation range of $45.26
to $48.39 per share, as compared to the per share price of $48.89 for CBS common
stock that was implied by the exchange ratio as of September 3, 1999.

     Evercore also estimated the value of Viacom with a similar sum-of-the-parts
analysis. Evercore used a range of values for each of Viacom's business segments
and assets.  These values were based on multiples of EBITDA, subscribers or
revenues, or on other metrics such as market value or historical cost.  The sum-
of-the parts valuation yielded a Viacom Class B common stock valuation range of
$44.60 to $51.83 per share, as compared to the per share price for Viacom Class
B common stock of $45.06 on September 3, 1999.

     The foregoing summary does not purport to be a complete description of the
analyses performed by Evercore or of its presentation to CBS' Board.  The
preparation of financial analyses and a fairness opinion is not susceptible to
partial analysis or summary description.  Evercore believes that its analyses
and the summary set forth above must be considered as a whole and that selecting
portions of its analyses and the factors considered by it, without considering
all analyses and factors, could create an incomplete view of the processes
underlying the analysis conducted by Evercore and its opinion.  Evercore has not
indicated that any of the analyses which it performed had a greater significance
than any other.

                                       76
<PAGE>

     In determining the appropriate analyses to conduct and when performing
those analyses, Evercore made numerous assumptions with respect to industry
performance, general business, financial, market and economic conditions and
other matters, many of which are beyond the control of CBS or Viacom.  The
analyses which Evercore performed are not necessarily indicative of actual
values or actual future results, which may be significantly more or less
favorable than suggested by the analyses.  The analyses were prepared solely as
part of Evercore's analysis as to whether the exchange ratio is fair, from a
financial point of view, to the holders of CBS common stock.  The analyses are
not appraisals and the estimates of values of companies do not reflect the
prices at which a company might actually be sold or the prices at which any
securities may trade at the present time or at any time in the future.

     Evercore is a nationally recognized investment banking firm that is
regularly engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions.  CBS retained Evercore based on these
qualifications as well as its familiarity with CBS and Viacom. Evercore has
previously provided various investment banking and financial advisory services
to CBS, for which Evercore received customary fees for the rendering of these
services.

     Pursuant to the terms of an engagement letter with Evercore, CBS agreed to
pay Evercore a fee equal to $2,500,000 following delivery of Evercore's fairness
opinion and $7,500,000 upon the completion of the merger.  Whether or not the
merger is completed, CBS has agreed under the engagement letter to reimburse
Evercore for all its reasonable out-of-pocket expenses, including the reasonable
fees and disbursements of its counsel, incurred in connection with its
engagement by CBS, and to indemnify Evercore against certain liabilities and
expenses in connection with its engagement.

Directors, Management and Corporate Governance of the Combined Company

     Pursuant to the merger agreement, the proposed new Restated Certificate of
Incorporation and By-laws, and the stockholder agreement between National
Amusements and CBS, Viacom, CBS and National Amusements have agreed to certain
corporate governance arrangements which generally cannot be changed for three
years following the merger without approval of at least 14 directors and, in
certain cases, approval of the combined company's shareholders.  These corporate
governance arrangements are described below.

      Chairman and Chief Executive Officer.  Mr. Redstone, the current Chairman
and CEO of Viacom, will remain the Chairman and CEO of Viacom following the
merger.  Mr. Redstone, as CEO, will be responsible, in consultation with the
President and COO, for Viacom's corporate policy and strategy and will chair all
Board and shareholder meetings at which he is present.  If Mr. Redstone ceases
to be the CEO at any time during the first three years following the merger, or
if Mr. Redstone is no longer the CEO at the effective time of the merger, Mr.
Karmazin will be the CEO and will retain the COO functions described below.

      President and Chief Operating Officer.  Mr. Karmazin, the current
President and CEO of CBS, will be the President and COO of Viacom following the
merger.  The COO will report directly to the CEO and must consult with the CEO
on all major decisions affecting the combined company.  Mr. Karmazin, as COO,
will be responsible for supervising, coordinating and managing the combined
company's business, operations, activities, operating expenses, capital
allocation, officers (other than the CEO) and employees, including hiring,
terminating, changing positions and allocating responsibilities of those
officers and employees (other than hiring of the Chief Financial Officer,
Controller and General Counsel, which can only be done by majority vote of the
combined company's board). All officers, other than the CEO, and employees will

                                       77
<PAGE>

report directly or indirectly to the COO. During the three-year period following
the merger, Mr. Karmazin cannot be terminated or demoted, whether he is COO or
CEO, and none of the COO functions may be changed, unless approved by a vote of
at least 14 directors.

      Board of Directors.  At the effective time of the merger, the Board of
Directors of Viacom will be expanded to 18 directors.  The Board size may not be
changed during the three-year period following the merger without the approval
of at least 14 directors.  Eight of the 18 directors initially will be
individuals who were directors of CBS on September 6, 1999, or any independent
directors of CBS subsequently appointed to the CBS Board of Directors, as
selected by the CBS Board of Directors prior to the effective time of the
merger.  The Viacom Board, subject to the fiduciary duties of its members, and
National Amusements, pursuant to its voting agreement with CBS, are required to
take all action necessary to fill any vacancy in any of the eight CBS
directorships with an independent director designated by a majority of the
remaining CBS directors.  No CBS director serving on the Viacom Board may be
removed from office during the three-year period following the merger unless the
removal is for cause and is approved by at least 14 directors.  The remaining
ten directors will be the Viacom directors immediately prior to the effective
time of the merger.  Of these ten directors, two must either be the current
independent directors of Viacom or other disinterested, independent persons that
are chief executive officers, chief operating officers, chief financial officers
or former chief executive officers of a Fortune 500 company or a non-U.S. public
company of comparable size. Subject to the preceding sentence, National
Amusements, which is controlled by Mr. Redstone, through its majority ownership
of Viacom Class A common stock, has the ability to cause the Viacom nominees to
be elected to serve as the ten remaining directors.

      Actions of the Board of Directors.  All actions to be taken by the Board
of Directors of Viacom following the merger will require the approval of at
least 14 directors, except for the actions specified below, which will require
approval only by a  majority of the Board:

      Acquisitions, Divestitures, Joint Ventures, Guarantees
      ------------------------------------------------------

     .    Any acquisition, equity investment or joint venture by Viacom or any
          of its subsidiaries for more than $25 million.

     .    Any divestiture or other sale of assets not in the ordinary course by
          Viacom or any of its subsidiaries for more than $25 million.

     .    Any real estate purchase, sale or lease by Viacom or any of its
          subsidiaries for more than $25 million.

     .    Any guarantee by Viacom or any of its subsidiaries of an obligation of
          a third party where the obligation guaranteed is more than $25
          million.

     .    Notwithstanding any of the above, any acquisition or divestiture by
          Viacom or any of its subsidiaries of (1) internet or internet related
          businesses for more than $25 million but less than $100 million, with
          the value thereof represented by multi-year commitments for
          advertising, promotion and content licensing, is excluded, so long as
          the aggregate of these acquisitions or divestitures, in each case,
          does not exceed $550 million and (2) radio or outdoor advertising
          businesses for more than $25 million but less than $100 million is
          excluded, so long as the aggregate of these acquisitions or
          divestitures, in each case, does not exceed $300 million; provided
          that (A) any

                                       78
<PAGE>

          divestiture of shares of a publicly traded internet or internet
          related business with a value of up to $75 million is excluded and
          will not be included in the calculation of any of the threshold
          amounts set forth above, (B) Board approval may be secured (but is not
          required) for any transaction of more than $25 million but less than
          $100 million where the regular meeting schedule of the Board so
          permits (and is not otherwise required), (C) the Board will be
          provided with information about and a status report on the
          transactions completed without Board approval and (D) this limit of
          authority will be reviewed 12 months following the merger and may be
          amended only with the approval of 14 directors.

     .    Any contract of Viacom or any of its subsidiaries not in the ordinary
          course with a value in excess of $25 million.

     .    Notwithstanding any of the above, any of the foregoing transactions
          that is approved by a majority of the Board will not be included in
          the calculation of any of the threshold amounts set forth above.

      Employee Matters
      ----------------

     .    Employee benefit plans of Viacom or any of its subsidiaries: (1)
          creating a new plan, (2) suspending or terminating an existing plan or
          (3) adopting any amendment that materially increases costs to Viacom
          or any subsidiary.

     .    Entering into any modifications or amendments to the employment
          agreements with the CEO or the COO.

      General
      -------

     .    The Annual Report on Form 10-K.

     .    The proxy statement and notice of meeting, including annual or special
          meeting date, location, record date for voting.

     .    Any issuance of Viacom stock, or options, warrants or other similar
          rights, including stock appreciation rights or debt or other
          securities convertible into or exchangeable for Viacom stock.

     .    Any issuance of debt unless the debt is short term and is within the
          spending limits of the annual operating budget or is replacing
          existing debt.

     .    Annual capital expenditure and annual operating budgets and individual
          capital expenditures in excess of $25 million for Viacom or any of its
          subsidiaries.

     .    Viacom or any of its subsidiaries pays a dividend or repurchases its
          stock from a third party.

     .    Review and approval of any action or transaction where Board action is
          required by law, other than (S) 141(a) of the DGCL, or by the terms of
          the transaction, in all cases other than as specifically set forth in
          Viacom's proposed new Restated Certificate of Incorporation.

                                       79
<PAGE>

     .    Review and approval of Board minutes.

     .    Subject to other provisions of Viacom's proposed new Restated
          Certificate of Incorporation, determining Board administration,
          including number of directors, meeting schedule, nominees, committees,
          director compensation, director and officer insurance authorization,
          internal investigations and retention of advisors in connection with
          the foregoing, and decisions regarding indemnification of individuals.

     .    Subject to other provisions of Viacom's proposed new Restated
          Certificate of Incorporation, amendments to the proposed new Restated
          Certificate of Incorporation and By-laws of Viacom.

     .    Commencement and settlement of major litigation.

     .    Selection of independent auditors.

     .    All matters on which Viacom's Board of Directors has historically
          taken action other than (1) matters relating to the subject matters
          addressed in this list and not requiring approval of the Board of
          Directors under Viacom's proposed new Restated Certificate of
          Incorporation and (2) those matters delegated to the COO, including
          all of the COO functions set forth in Viacom's proposed new Restated
          Certificate of Incorporation.

      Committees of the Board.  The Board of Directors of Viacom may delegate
any of its responsibilities to a committee.  During the three-year period
following the merger, except with respect to the Compensation Committee and the
Officers Nominating Committee described below, CBS directors must be represented
on each committee in the same proportion as their representation on the full
Board of Directors, with a minimum of one CBS director on each committee.

     Viacom's proposed new Restated Certificate of Incorporation specifically
provides for two committees, the Officers Nominating Committee and the
Compensation Committee:

           Officers Nominating Committee.  The Officers Nominating Committee
           -----------------------------
     will be composed of the COO or, in the event Mr. Karmazin is CEO, the CEO.
     During the three-year period following the merger, the Officers Nominating
     Committee has the power, subject to the powers of the Compensation
     Committee, to hire, elect, terminate, change positions, allocate
     responsibilities and determine non-equity compensation of officers and
     employees, other than the Chairman, CEO and COO.  The Officers Nominating
     Committee will not, however, have the power to fill the position of Chief
     Financial Officer, Controller or General Counsel without approval by a
     majority of the Board of Directors, although the Officers Nominating
     Committee will have the power to terminate the employment of the persons
     holding those positions.  Any action taken by the Officers Nominating
     Committee may be overturned by a vote of at least 14 directors.

            Compensation Committee.  The Compensation Committee will be
           -----------------------
     composed of three CBS directors who are independent directors and three
     non-CBS directors, all of whom are independent.  Except as set forth in the
     following sentence, all compensation must be approved by the Compensation
     Committee.  The Compensation Committee does not have the power to approve
     the annual compensation of any talent, as that term is commonly used in the
     media or entertainment industries, or of any employee whose annual cash
     compensation, measured as

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     salary plus target bonus is less than $1 million. These powers are
     delegated to the Officers Nominating Committee.

     Subsidiaries.  The CEO and COO will be elected or appointed to the boards
of directors of all public subsidiaries of Viacom following the merger.  In
addition, the Board of Directors of Viacom will have the right, in consultation
with the COO or, if Mr. Karmazin is the CEO, the CEO, to implement corporate
governance arrangements for any public subsidiary of Viacom consistent with the
corporate governance arrangements contained in Viacom's proposed new Restated
Certificate of Incorporation.

Accounting Treatment

     The merger will be accounted for as a purchase for financial accounting
purposes in accordance with generally accepted accounting principles.  For
purposes of preparing Viacom's consolidated financial statements, Viacom will
establish a new accounting basis for CBS' assets and liabilities based upon
their fair values, the merger consideration and the costs of the merger.  Viacom
believes that any excess of cost over the fair value of the net assets of CBS
will be recorded as goodwill and other intangible assets.  A final determination
of the intangible asset lives and required purchase accounting adjustments,
including the allocation of the purchase price to the assets acquired and
liabilities assumed based on their respective fair values, has not yet been
made.  Accordingly, the purchase accounting adjustments made in connection with
the development of the unaudited pro forma combined financial information
appearing elsewhere in or incorporated by reference into this joint proxy
statement/prospectus are preliminary and have been made solely for purposes of
developing that pro forma information.  Viacom will determine the fair value of
certain of CBS' assets and liabilities and will make appropriate purchase
accounting adjustments, including adjustments to the amortization period of the
intangible assets, upon completion of that determination.

Federal Income Tax Consequences

     The following discussion summarizes the material United States federal
income tax consequences of the merger assuming that it is consummated as
contemplated by this joint proxy statement/prospectus.  This discussion is based
on the Internal Revenue Code, U.S. Treasury regulations, judicial decisions and
administrative rulings as of the date hereof, all of which are subject to
change, including changes with retroactive effect.  The discussion below does
not address any state, local or foreign tax consequences of the merger.  This
discussion assumes that shareholders hold such shares as capital assets.  The
tax treatment of a shareholder may vary depending upon the shareholder's
particular situation, and certain shareholders (including individuals who hold
options in respect of CBS common stock, insurance companies, tax-exempt
organizations, financial institutions or broker-dealers, and persons who are
neither citizens nor residents of the United States or that are foreign
corporations, foreign partnerships or foreign estates or trusts as to the United
States) may be subject to special rules not discussed below.  Neither Viacom nor
CBS has requested or will request an advance ruling from the Internal Revenue
Service as to the tax consequences of the merger.

     EACH CBS SHAREHOLDER IS URGED TO CONSULT HIS, HER OR ITS OWN TAX ADVISOR AS
TO THE PARTICULAR TAX CONSEQUENCES TO HIM, HER OR IT OF THE MERGER, INCLUDING
THE APPLICABILITY AND EFFECT OF ANY STATE, LOCAL OR FOREIGN LAWS, AND OF CHANGES
IN APPLICABLE TAX LAWS.

     Federal Income Tax Consequences of the Merger.   Cravath, Swaine & Moore,
counsel to CBS, and Paul, Weiss, Rifkind, Wharton & Garrison, counsel to Viacom,
will each render an opinion

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as to the qualification of the merger as a tax-free reorganization under Section
368 of the Internal Revenue Code. An opinion of counsel is not binding on the
Internal Revenue Service or the courts. Further, the opinions of Cravath, Swaine
& Moore and Paul, Weiss, Rifkind, Wharton & Garrison referred to above are based
on, among other things, current law and certain representations as to factual
matters made by, among others, CBS and Viacom. Any change in current law, which
may or may not be retroactive, or failure of any such factual representations to
be true, correct and complete in all material respects would jeopardize the
conclusions reached by counsel in their opinions. Neither CBS nor Viacom is
currently aware of any facts or circumstances that would cause any
representations made by it to Cravath, Swaine & Moore and Paul, Weiss, Rifkind,
Wharton & Garrison to be untrue or incorrect in any material respect. These
opinions state that:

          (i)   The merger will qualify as a reorganization under Section 368(a)
     of the Internal Revenue Code and each of CBS and Viacom will be a party to
     that reorganization within the meaning of Section 368(b) of the Internal
     Revenue Code.

          (ii)  Except for any payment received in lieu of fractional shares and
     to the extent that any payment by Viacom of transfer taxes is treated as
     taxable consideration received by the CBS shareholders, a shareholder will
     not recognize any income, gain or loss as a result of the receipt of Viacom
     Class B common stock.

          (iii) A CBS shareholder's tax basis for the shares of Viacom Class B
     common stock, including any fractional share interest for which payment is
     received, will equal such shareholder's tax basis in shares of CBS common
     stock held immediately before the merger.

          (iv)  A CBS shareholder's holding period for the Viacom Class B common
     stock, will include the period during which the shares of CBS common stock
     were held.

     Payment received by a CBS shareholder in lieu of a fractional share
interest of Viacom Class B common stock will be treated as having been received
in exchange for the fractional share interest of Viacom Class B common stock
that the shareholder would otherwise have been entitled to receive. This receipt
of this payment will result in gain or loss measured by the difference between
the tax basis allocable to the fractional share interest and the amount of
payment received.  The gain or loss will be capital gain or loss to the
shareholder.

     Viacom and CBS do not believe that any significant transfer taxes will be
payable as a consequence of the merger.  Viacom's payment of any transfer taxes
that, to the knowledge of Viacom and CBS, may be payable as a consequence of the
merger should not be treated as taxable consideration received by CBS
shareholders in the merger.  If the payment of any such taxes were treated as
taxable consideration, the CBS shareholders would recognize income or gain in an
amount not in excess of the amount of such taxable consideration.

     Backup Withholding.  Under the backup withholding rules, a holder of Viacom
Class B common stock may be subject to backup withholding at the rate of 31%
with respect to payment received in exchange for the fractional share interest
unless the shareholder (i) is a corporation or comes within certain other exempt
categories and, when required, demonstrates this fact or (ii) provides a
taxpayer identification number and certifies that the taxpayer identification
number is correct and the taxpayer is not subject to backup withholding for
specified reasons, and otherwise complies with applicable requirements of the
backup withholding rules.  Any amount withheld under these rules will be
credited against the shareholder's federal income tax liability.

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Merger Consideration

     At the effective time of the merger, each outstanding share of CBS common
stock, including any shares held by any direct or indirect wholly owned
subsidiary of Viacom or CBS but excluding any shares owned by Viacom or CBS as
provided in the following paragraph, will be converted into the right to receive
1.085 fully paid and nonassessable shares of Viacom non-voting Class B common
stock, except that a payment will be made in lieu of fractional shares as
described below.  As of the effective time of the merger, all shares of CBS
common stock will no longer be outstanding and will automatically be cancelled
and will cease to exist and each holder of a certificate representing any shares
of CBS common stock will cease to have any rights other than the right to
receive the merger consideration.  The exchange ratio was determined through
arm's-length negotiations between CBS and Viacom.

     As of the effective time of the merger, any shares of CBS common stock
owned immediately prior to the effective time of the merger by Viacom or CBS,
excluding any shares held by any direct or indirect wholly owned subsidiary of
Viacom or CBS, will be cancelled and retired and will cease to exist and no
consideration will be delivered in exchange for these shares.

Conversion of Shares; Procedures for Exchange of Certificates; Fractional Shares

     The conversion of CBS common stock into the right to receive Viacom non-
voting Class B common stock and payment instead of fractional shares will occur
automatically at the effective time of the merger.  As soon as practicable after
the effective time of the merger, . or another bank or trust company designated
by Viacom and acceptable to CBS, in its capacity as 1 exchange agent, will send
a transmittal letter to each former CBS shareholder.  The transmittal letter
will contain instructions on how to obtain shares of Viacom Class B common stock
in exchange for shares of CBS common stock. CBS shareholders should not send in
their stock certificates until they receive the transmittal letter and
accompanying materials from the exchange agent.

     In the event of a transfer of ownership of CBS common stock which is not
registered in the records of CBS' transfer agent, a certificate representing the
proper number of shares of Viacom Class B common stock may be issued to a person
other than the person in whose name the certificate surrendered is registered if
the certificate is properly endorsed or otherwise is in proper form for transfer
and the person requesting the issuance pays any required transfer or other taxes
required by reason of the issuance of shares of Viacom Class B common stock to a
person other than the registered holder of the certificate or establishes to the
satisfaction of Viacom that the taxes have been paid or are not applicable.

     All shares of Viacom Class B common stock issued upon conversion of shares
of CBS common stock, together with any payment in lieu of fractional shares of
Viacom Class B common stock, will be deemed to have been issued and paid in full
satisfaction of all rights pertaining to the shares of CBS common stock, subject
to Viacom's obligation to pay any dividends or make any other distributions with
a record date after the effective time of the merger that may have been declared
or made by Viacom on shares of Viacom Class B common stock after the effective
time of the merger and which remain unpaid prior to the issuance of Viacom Class
B common stock in exchange for CBS common stock.

     No fractional shares of Viacom Class B common stock will be issued to any
CBS shareholder upon surrender of certificates previously representing CBS
common stock.  For each fractional share

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that would otherwise be issued, Viacom, through the exchange agent, will pay to
CBS shareholders an amount equal to the product obtained by multiplying the
fractional share interest to which the shareholder would otherwise be entitled
by the closing price for a share of Viacom Class B common stock on the
Consolidated Tape, Network A, as reported in The Wall Street Journal (Northeast
edition), or any other authoritative source, on the first trading day
immediately following the effective time of the merger.

Litigation

     On September 7, 1999, three purported shareholder class action lawsuits
were filed against CBS, and the members of the CBS Board of Directors; one in
the Supreme Court of the State of New York and two in the Philadelphia County
Court of Common Pleas.  These complaints allege, among other things, that the
defendants have breached their fiduciary duties by failing to maximize
shareholder value in connection with entering into the merger agreement.  The
complaints seek, among other things, an order enjoining completion of the
merger.  CBS believes that the complaints are without merit and plans to defend
vigorously against the complaints.

Effective Time of the Merger

     The effective time of the merger will be the time of the filing of the
certificate of merger with the Secretary of State of the State of Delaware or
any later time as is agreed upon by Viacom and CBS and specified in the
certificate of merger.

Federal Securities Laws Consequences

     The Viacom Class B common stock to be issued pursuant to the merger
agreement will not be subject to any restrictions on transfer arising under the
Securities Act of 1933, except for shares issued to any CBS shareholder who may
be deemed to be an "affiliate" of CBS or Viacom for purposes of Rule 145 under
the Securities Act.  It is expected that each affiliate will enter into an
agreement with Viacom providing that the affiliate will not transfer any Viacom
Class B common stock received in the merger except in compliance with the resale
provisions of Rules 144 or 145 under the Securities Act or as otherwise
permitted under the Securities Act.  The merger agreement requires CBS to use
reasonable best efforts to cause its affiliates to enter into these agreements,
and CBS has represented and warranted that it has advised its affiliates of the
resale restrictions imposed by applicable securities laws.  This joint proxy
statement/prospectus does not cover resales of Viacom Class B common stock
received by any person upon consummation of the merger, and no person is
authorized to make any use of this joint proxy statement/prospectus in
connection with any resale.

Stock Exchange Quotation

     It is a condition to the consummation of the merger that the shares of
Viacom Class B common stock to be issued pursuant to the merger agreement be
authorized for listing on the New York Stock Exchange, subject to official
notice of issuance.  Viacom will file a listing application with the New York
Stock Exchange.

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Viacom's Board of Directors After the Merger

     As of the effective time of the merger, it is anticipated that the Board
will consist of the ten current directors of Viacom, as well as the eight
individuals who will be designated by CBS prior to the effective time of the
merger.

Dissenters' and Appraisal Rights

     Under the Pennsylvania Business Corporation Law, holders of CBS common
stock are not entitled to dissenters' rights in connection with the merger.

     Under the Delaware General Corporation Law, holders of Viacom Class A
common stock and Viacom Class B common stock are not entitled to appraisal
rights as a result of the merger.

Delisting and Deregistration of CBS Common Stock

          If the merger is consummated, the shares of CBS common stock will be
delisted from the NYSE, the Boston Stock Exchange, the Chicago Stock Exchange,
the Pacific Exchange and the Philadelphia Stock Exchange and will be
deregistered under the Exchange Act.

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                           THE MERGER AGREEMENT AND
                              RELATED AGREEMENTS


The Merger Agreement

      Effective Time and Closing of the Merger

     The closing of the merger will take place on the first business day after
the satisfaction or, if permissible, waiver of the conditions to closing set
forth in the merger agreement.  On the closing date, Viacom and CBS will
consummate the merger by filing (1) a certificate of merger with the Secretary
of State of the State of Delaware and (2) articles of merger with the Department
of State of the Commonwealth of Pennsylvania.  The effective time of the merger
will be the filing of the certificate of merger with the Secretary of State of
the State of Delaware, or any later time as may be agreed by the parties and
specified in the certificate of merger.

      Conversion of Securities

     At the effective time of the merger, each share of CBS common stock issued
and outstanding immediately prior to the effective time of the merger, including
any shares owned by any direct or indirect wholly owned subsidiary of Viacom or
CBS but excluding any shares to be cancelled pursuant to the following sentence,
will be converted into the right to receive 1.085 shares of Viacom Class B
common stock.  At the effective time of the merger, each share held in the
treasury of CBS and each share owned by Viacom immediately prior to the
effective time of the merger will be cancelled and extinguished and no payment
will be made for those shares.  After the effective time of the merger, each
certificate that previously represented shares of CBS common stock will
represent only the right to receive Viacom Class B common stock into which the
shares of CBS common stock are converted in the merger and payment instead of
fractional shares of Viacom Class B common stock.

      As soon as practicable after the effective time of the merger, . or
another bank or trust company designated by Viacom and acceptable to CBS, in its
capacity as exchange agent, will send a transmittal letter to each former CBS
shareholder.  The transmittal letter will contain instructions on how to obtain
shares of Viacom Class B common stock in exchange for shares of CBS common
stock. CBS shareholders should not send in their stock certificates until they
receive the transmittal materials from the exchange agent.

Viacom's Proposed New Restated Certificate of Incorporation and By-laws

     Viacom's proposed new Restated Certificate of Incorporation and By-laws
give effect to the governance arrangements agreed between Viacom and CBS.  You
can find more information on the governance arrangements in the section titled
"The Merger--Directors, Management and Corporate Governance of the Combined
Company."

Representations and Warranties of Viacom and CBS

     Viacom and CBS made mutual customary representations and warranties in the
merger agreement regarding the following:

     .    corporate organization and qualification to do business of each of the
          companies and their subsidiaries;

     .    validity and effectiveness of charters and by-laws;

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<PAGE>

     .    capitalization of the companies;

     .    authority to enter into the merger agreement;

     .    absence of conflicts between the merger agreement and the merger, on
          the one hand, and other contractual and legal obligations of the
          companies, on the other hand;

     .    requirement of consents, approvals, filings or other authorizations to
          enter into the merger agreement and consummate the merger;

     .    possession and effectiveness of all permits and licenses and contracts
          necessary to carry on business as currently conducted;

     .    absence of material non-competition agreements;

     .    operation of business in material compliance with permits, licenses
          and applicable laws;

     .    compliance with all applicable SEC filing requirements and accuracy
          and completeness of SEC filings;

     .    financial statements contained in SEC filings;

     .    absence of changes or events since December 31, 1998;

     .    litigation;

     .    employee benefit plans;

     .    labor matters;

     .    environmental matters;

     .    intellectual property;

     .    tax matters;

     .    Year 2000 compliance;

     .    opinion of financial advisors;

     .    shareholder vote required to adopt the merger agreement;

     .    use of brokers;

     .    inapplicability of certain state anti-takeover provisions; and

     .    in the case of CBS, that neither the merger agreement nor the merger
          would give rise to the exercise or issuance of rights under its
          shareholders' rights plan.

None of the representations and warranties made in the merger agreement survive
the closing of the merger.

No Solicitation Provision

     CBS has agreed not to, directly or indirectly, through any officer,
director, agent or otherwise, initiate, solicit or knowingly encourage, or take
any other action knowingly to facilitate, any inquiries or the making of any
proposal that constitutes, or may reasonably be expected to lead to, any

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"competing transaction", which is defined in the merger agreement as any
transaction, other than the merger, that would result in a third party or its
shareholders acquiring more than 35% of the voting power of the CBS common stock
then outstanding or more than 35% of the assets of CBS and its subsidiaries,
taken as a whole, or enter into or maintain or continue discussions or negotiate
with any person in furtherance of any related inquiries or to obtain a competing
transaction, or agree to or endorse any competing transaction, or authorize any
of the officers, directors or employees of CBS or any agent or representative of
CBS to take any such action. CBS has agreed to notify Viacom as promptly as
practicable of all the relevant material details relating to all inquiries and
proposals that CBS, or any officer, director, employee, agent or representative,
may receive relating to any of the foregoing matters.

     Notwithstanding the foregoing, prior to the adoption of the merger
agreement by the shareholders of CBS, the Board of Directors of CBS is not
prohibited from:

          (1) furnishing information to, or entering into and engaging in
     discussions or negotiations with, any person that makes a bona fide
     unsolicited written proposal that the Board of Directors of CBS determines
     in good faith, after consultation with CBS' financial advisors and
     independent legal counsel, can be reasonably expected to result in a
     "superior proposal", which is defined in the merger agreement as any
     proposal that would result in a third party acquiring, directly or
     indirectly, more than 50% of the voting power of the outstanding CBS common
     stock or all or substantially all the assets of CBS and its subsidiaries,
     taken as a whole, for consideration which the Board of Directors of CBS
     determines in its good faith judgment to be more favorable to CBS'
     shareholders than the merger with Viacom, provided that CBS must notify
     Viacom of its intention to provide information to, or enter into
     negotiations with, a third party concerning a superior proposal, keep
     Viacom informed of the status and material terms of any superior proposal
     and enter into a confidentiality agreement with the third party on
     customary terms;

          (2) complying with its disclosure and other obligations under
     applicable laws; or

          (3) failing to make or withdrawing or modifying its recommendation to
     shareholders regarding adoption of the merger agreement following the
     making of a superior proposal if the Board of Directors of CBS, after
     consultation with and based upon advice of independent legal counsel,
     determines in good faith that the action is necessary for the Board of
     Directors of CBS to comply with its fiduciary duties under applicable law.

Mutual Covenants of Viacom and CBS

     Viacom and CBS have agreed as follows:

     .    each company will cooperate to file the SEC documents necessary to
          complete the merger;

     .    each company will call and hold a shareholder's meeting to vote upon
          the adoption of the merger agreement;

     .    each company will solicit proxies in favor of the adoption of the
          merger agreement, unless it determines, after receiving advice from
          independent legal counsel, that failure to do so is required in order
          for its directors to comply with their fiduciary duties under
          applicable law;

     .    each company will promptly make all governmental filings necessary to
          consummate the merger and otherwise use best efforts to consummate the
          merger, including, if

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<PAGE>

          necessary, committing to or effecting the disposition of those of its
          assets or businesses as are required to be divested in order to obtain
          the consent of the FCC or to avoid or cause to be removed any other
          legal impediment that would otherwise prevent or materially delay the
          consummation of the merger;

     .    each party will use reasonable best efforts to obtain any third party
          consents necessary, proper or advisable to consummate the merger;

     .    each company will continue to allow the other company reasonable
          access to its corporate records;

     .    Viacom's proposed new Restated Certificate of Incorporation and By-
          laws following the merger will contain the indemnification provisions
          in favor of officers and directors that are contained in Viacom's
          current Restated Certificate of Incorporation and By-laws;

     .    subject to certain dollar limitations, for six years following the
          merger Viacom will maintain directors' and officers' liability
          insurance covering those persons who are currently covered by CBS'
          directors' and officers' liability insurance policy on terms
          comparable to CBS' existing coverage;

     .    each company will promptly notify the other company of any event that
          would likely cause any representation or warranty to be untrue or
          inaccurate or any covenant or condition not to be complied with or
          satisfied, or of any failure to comply with or satisfy any covenant or
          condition;

     .    neither company will take any action that would undermine the
          qualification of the merger as a tax-free reorganization under Section
          368 of the Internal Revenue Code;

     .    Viacom will promptly prepare and submit an application to the New York
          Stock Exchange for the listing of the new shares of Viacom Class B
          common stock;

     .    the companies will consult with each other regarding any public
          announcements they make concerning the merger;

     .    the Viacom Board of Directors will take all necessary action to
          increase the number of Board members to eighteen and to cause to be
          appointed eight designees of CBS;

     .    CBS will take the necessary action to render its shareholders' rights
          agreement inapplicable to the merger agreement and the merger;

     .    Viacom will assume the debt and other liabilities and obligations of
          CBS;

     .    CBS will notify Viacom of all persons that may be deemed affiliates of
          CBS under Rule 145 of the Securities Act, and CBS will use its
          reasonable best efforts to obtain from each affiliate a letter in
          which the affiliate agrees to comply with the resale restrictions of
          Rules 144 and 145 under the Securities Act following the merger;

     .    Viacom will take measures to give continuing employees credit under
          Viacom's benefit plans for prior service with CBS; and

     .    both companies may establish retention and severance agreements
          consistent with terms and conditions set forth in the merger
          agreement.

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Conduct of Business Prior to the Closing

     Viacom and CBS have each agreed that, subject to certain exceptions,
between the execution of the merger agreement and the effective time of the
merger, each company and its respective subsidiaries will:

     .    conduct their businesses in the ordinary course of business and in a
          manner consistent with past practice;

     .    use their reasonable best efforts to preserve substantially intact
          their business organizations and to keep available the services of
          their current officers, employees and consultants; and

     .    use their reasonable best efforts to preserve their current
          relationships with customers, distributors, dealers, suppliers and
          other persons that have significant business relations with the
          companies.

     Viacom and CBS have also agreed that subject to certain exceptions, prior
to the effective time of the merger, without the prior written agreement of the
other party, they and their subsidiaries will not:

     .    amend or otherwise change their charters or by-laws in a manner that
          would have a material adverse effect;

     .    issue, sell or otherwise dispose of equity securities, except for (A)
          in the case of CBS and its subsidiaries (1) the issuance of common
          stock upon the exercise of outstanding options, (2) the issuance of
          common stock in connection with pending transactions, (3) the grant of
          options to purchase up to 22,200,000 shares of CBS common stock and
          (4) the grant of options to purchase up to 12,500,000 shares of
          Infinity Broadcasting Corporation and (B) in the case of Viacom and
          its subsidiaries (1) the issuance of common stock upon the exercise of
          outstanding options and (2) the grant of options to purchase up to
          6,000,000 shares of Viacom Class B common stock;

     .    sell, encumber or otherwise dispose of any assets material to the
          respective companies and their subsidiaries, taken as a whole, other
          than in the ordinary course of business consistent with past practice;

     .    declare, make or pay any dividend or other distribution other than (1)
          intercompany cash dividends, (2) in the case of CBS and its
          subsidiaries, dividends made or paid by Infinity not to exceed
          $500,000,000 and (3) in the case of Viacom and its subsidiaries,
          dividends made or paid by Blockbuster not to exceed $50,000,000;

     .    reclassify, combine, split, subdivide or redeem, purchase or otherwise
          acquire, directly or indirectly, any of their or their subsidiaries'
          capital stock;

     .    except in connection with acquisitions that individually do not exceed
          $200,000,000 and in the aggregate do not exceed $1,000,000,000 and
          except, in the case of CBS and its subsidiaries, in connection with
          pending transactions, (1) acquire or otherwise invest in other
          companies or business organizations or (2) incur any indebtedness
          other than in the ordinary course of business and other than in
          connection with refinancings;

     .    enter into or amend any material contract, agreement or transaction
          that would not be in the ordinary course of business and that would be
          reasonably likely to prevent or materially delay the consummation of
          the merger;

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     .    authorize any capital expenditures which are in the aggregate in
          excess of the amounts currently budgeted for fiscal year 1999 and,
          with respect to fiscal year 2000, 10% in excess of the 1999 amount, in
          each case for the respective companies and their subsidiaries taken as
          a whole;

     .    increase compensation to executive officers or employees, except in
          accordance with retention or severance arrangements generally agreed
          to between the parties or as required by law or any existing agreement
          and except for increases in the ordinary course of business consistent
          with past practice;

     .    grant any severance or termination pay to, or enter into any
          employment or severance agreement with, any director or executive
          officer, provided that no CBS or Viacom subsidiary will be restricted
          by any of the foregoing from (1) entering into employment contracts
          with newly-hired or promoted executive officers, or making severance
          payments, on terms substantially consistent with currently existing
          contracts or (2) providing for the payment of severance to executive
          officers or employees on terms substantially consistent with past
          practice;

     .    materially change their accounting practices;

     .    make any tax election that, individually or in the aggregate, would
          have a material adverse effect, or settle or compromise any material
          tax liability; and

     .    enter into any contract, agreement, lease, license, permit, franchise
          or other instrument or obligation which, if in existence and known
          prior to the execution of the merger agreement, would have conflicted
          with the entrance into and performance of the merger agreement in a
          manner that would give rise to a material adverse effect.

     Notwithstanding any of the foregoing:

     .    CBS is not restricted from taking actions in connection with the
          consummation of the pending acquisitions of King World, Outdoor
          Systems and certain television station assets from Gaylord
          Entertainment Company on terms previously agreed to with these parties
          or, unless Viacom has consented, on other terms that would not be
          reasonably likely to have an impact that is both material and
          detrimental to CBS and its subsidiaries, taken as a whole;

     .    Viacom is not restricted from consummating an exchange offer of
          Blockbuster shares owned by Viacom for shares of Viacom common stock
          owned by the shareholders of Viacom in accordance with procedures
          agreed upon between Viacom and CBS; and

     .    neither Infinity nor Blockbuster is restricted from taking any action
          that would otherwise violate any of the restrictions on conduct of
          business prior to the effective time of the merger if its Board of
          Directors determines that the action is required to be taken in the
          exercise of the Board's fiduciary duties.

Stock Options and Employee Benefit Plans

     Stock Options and Other Stock Plans
     -----------------------------------

     Each outstanding unexpired and unexercised option or warrant to purchase
shares of common stock of CBS will be automatically converted at the effective
time of the merger into an option or warrant to purchase shares of Viacom Class
B common stock, in a number determined by multiplying the number of shares of
CBS common stock that could have been purchased under the CBS option or

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warrant by the exchange ratio of 1.085. The exercise price of these options will
equal the per-share exercise price of the corresponding CBS option or warrant
divided by the exchange ratio. The substitute options or warrants will be
subject to the same terms and conditions as the corresponding CBS options or
warrants and the vesting of the options or warrants will accelerate on account
of the merger to the extent provided in the applicable option or warrant. After
the effective time of the merger:

     .    all references to CBS in CBS' equity based compensation plans and
          agreements will be deemed to refer to Viacom; and

     .    Viacom will assume all of CBS' obligations with respect to the
          substitute options and warrants.

     Viacom will issue to each CBS option or warrant holder a document
evidencing its assumption of the options and warrants.  Viacom has agreed to
file a Form S-8 or other appropriate registration statement covering the shares
of Viacom Class B common stock underlying the assumed options and warrants no
later than one business day after the effective time of the merger and to keep
the registration statement current.

     Other Employee Arrangements
     ---------------------------

     Viacom will recognize service with CBS under Viacom's employee benefit
plans, except where the crediting would result in duplication of benefits, and
will honor all personal and sick days accrued by CBS employees who continue
employment with Viacom after the effective time of the merger.

     Viacom may pay up to a total of $30 million to its employees as retention
bonuses, payable on or after the effective time of the merger.  Viacom has also
established severance arrangements for its corporate staff, including the
executive severance plan described in the section captioned "Interests of
Certain Persons in the Merger -- Viacom -- Executive Severance Plan."   CBS may
also establish similar retention, severance and compensation arrangements as
long as the total cost of those arrangements is not materially greater than the
cost of Viacom's arrangements.

      Conditions to Closing

     The obligations of Viacom and CBS to consummate the merger are subject to
the satisfaction or waiver of the following conditions:

     .    adoption of the merger agreement by the shareholders of CBS and
          Viacom;

     .    expiration or termination of any applicable waiting period under the
          HSR Act;

     .    no governmental authority or court having entered an order or taken
          other legal action making the merger illegal or otherwise prohibiting
          its consummation;

     .    the SEC having declared the Viacom registration statement, of which
          this joint proxy statement/prospectus forms a part, effective and
          there existing no stop order or other action to suspend the
          effectiveness of the registration statement;

     .    the making by both companies of all required filings and notices, and
          the receipt by both companies of all required governmental consents,
          approvals or other authorizations, other than those which, if not
          obtained, would not have a material adverse effect, at or after the
          effective time of the merger, on the business, results of operations
          or financial condition of CBS, Viacom and their subsidiaries,
          collectively taken as a whole;

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     .    authorization for listing on the New York Stock Exchange of the shares
          of Viacom Class B common stock to be issued to CBS shareholders,
          subject to official notice of issuance;

     .    the continued truthfulness and accuracy of the representations and
          warranties, except where the failure to be true or correct would not
          have, individually or in the aggregate, a material adverse effect, and
          the performance or compliance in all material respects with all
          material agreements, and receipt from the other party of a certificate
          of an officer certifying to the foregoing; and

     .    each company having received an opinion from its tax counsel that the
          merger will qualify as a tax-free reorganization under Section 368 of
          the Internal Revenue Code.

Termination and Termination Fees

     The merger agreement may be terminated and the merger abandoned at any time
prior to the closing date:

     .    by mutual written consent of Viacom and CBS;

     .    by either company if the transaction is not completed on or prior to
          August 31, 2000;

     .    by CBS upon written notice to Viacom of the existence of a competing
          proposal for the acquisition of more than 50% of the voting power of
          CBS or all or substantially all of the assets of CBS and its
          subsidiaries, taken as a whole, for consideration which CBS' Board of
          Directors determines in its good faith judgment to be more favorable
          to CBS shareholders than the merger, provided, however, that
          termination pursuant to this provision will not be effective until
          Viacom has had two days within which to match the competing proposal
          and until CBS pays the termination fee described below;

     .    by either company if CBS does not receive the required shareholder
          approval;

     .    by either company upon the other company's breach of a representation,
          warranty, covenant or agreement, or if any representation or warranty
          becomes untrue, in either case so that the seventh condition to
          closing set forth above cannot be satisfied on or before August 31,
          2000; or

     .    by either company if a governmental authority has taken any final and
          non-appealable action prohibiting the consummation of the merger.

     If CBS terminates the merger agreement in accordance with the provision set
forth in the third bullet point above, CBS is required to pay Viacom a
termination fee of $1 billion.  CBS is also required to pay Viacom a $1 billion
termination fee if all of the following occur:  (1) either company terminates
the merger agreement as a result of the CBS shareholders failing to adopt the
merger agreement; (2) a competing proposal for the acquisition of more than 50%
of the voting power or assets of CBS has been made public at or prior to the
time of the failure to adopt the merger agreement, and (3) within 12 months
after termination, CBS consummates, or enters into a binding agreement with
respect to, a competing proposal.

The Voting Agreement

     Simultaneously with the execution of the merger agreement, National
Amusements, which is controlled by Mr. Redstone and which holds approximately
68% of the voting power of Viacom, entered into a voting agreement with CBS in
which it has agreed to vote all of its shares of Viacom

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Class A common stock in favor of the adoption of the merger agreement and
against any proposals in opposition to the merger agreement. National Amusements
has also agreed in the voting agreement not to transfer ownership of any of its
shares of Viacom Class A common stock unless the transferee unconditionally
agrees in writing to be bound by the voting agreement. The voting agreement
terminates upon the earlier of the termination of the merger agreement or the
effective time of the merger.

The Stockholder Agreement

     Simultaneously with the execution of the merger agreement, National
Amusements also entered into a stockholder agreement with CBS, pursuant to which
National Amusements has agreed, for a period of three years following the
merger, to support the governance arrangements agreed to between Viacom and CBS.
Among other things, National Amusements has agreed to:

     .    cause to be nominated and elected to the Viacom Board eight directors
          designated by CBS or by the CBS designees, so that there are eight CBS
          directors on the Viacom Board at all times;

     .    take all action necessary to ensure that any vacancy in a CBS
          directorship is filled immediately by an independent director
          designated by a majority of the remaining CBS directors;

     .    take all action necessary to ensure that no CBS director is removed
          unless the removal is for cause and is approved by at least 14 members
          of the Viacom Board;

     .    take all action necessary to cause any vacancy in a seat currently
          held by a Viacom independent director to be filled by an independent
          director that meets the qualifications stated in the proposed new
          Restated Certificate of Incorporation;

     .    not take any action to amend, modify or repeal, or adopt provisions or
          take other actions that would be inconsistent with, the provisions of
          Viacom's proposed new Restated Certificate of Incorporation and By-
          Laws that relate to the governance structure of Viacom during the
          three year period following the merger;

     .    not transfer any of its shares of Viacom Class A common stock unless
          the transferee unconditionally agrees in writing to be bound by the
          stockholder agreement; and

     .    take all action necessary to ensure that it or its transferees own at
          all times a majority of the outstanding shares of voting stock of
          Viacom.

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                   INTERESTS OF CERTAIN PERSONS IN THE MERGER

         In considering the respective recommendations of the Viacom Board and
the CBS Board with regard to the merger, you should be aware that, as described
below, certain members of the respective managements and Boards of Directors of
Viacom and CBS may have interests in the merger that are different from, or in
addition to, your interests, and that may create potential conflicts of
interest. Three executive officers of Viacom are members of the ten-person
Viacom Board that approved the merger. Two executive officers of CBS are members
of the 11-person CBS Board that approved the merger.

Viacom

         Continuing Board Positions. All ten members of the current Viacom Board
are expected to continue as members of the Viacom Board  following the effective
time of the merger, including Messrs. Redstone, Dauman and Dooley.

         Employment Agreement with Mr. Redstone. Viacom entered into an
employment agreement with Mr. Redstone to serve as its Chairman and CEO
following the effective time of the merger. Mr. Redstone will receive an annual
base salary of $1 million and an annual bonus, with an established target bonus
of $5 million and a maximum bonus of $10 million for calendar year 2000,
prorated to reflect the actual number of days that the agreement is in effect
during the year 2000. The target and maximum bonus amounts increase by 10%
annually through 2003. Mr. Redstone will also receive deferred compensation of
$2 million during calendar year 2000, prorated to reflect the number of days the
agreement is in effect during the year 2000, thereafter to be increased annually
by 10% of his salary and deferred compensation for the preceding year. He will
also receive a grant of options to purchase 2,000,000 shares of Viacom Class B
common stock, vesting in three equal annual installments.

         Resignation Agreements. Pursuant to agreements entered into with Viacom
on September 6, 1999, Messrs. Dauman and Dooley have agreed to resign from
Viacom effective at the effective time of the merger. Messrs. Dauman and Dooley
will each continue to serve as Deputy Chairman and Executive Vice President of
Viacom until the effective time of the merger and will each receive the
following payments:

         (1)      as soon as practicable after their resignations:

                  .        a one-time cash payment equal to the amount that
                           would have been payable under their current
                           employment agreements through their original terms,
                           or December 31, 2003,

                  .        payouts of all deferred compensation accounts and the
                           balance of their accounts under the Viacom Excess
                           Investment Plan, and

                  .        a transaction bonus in the amount of $5,000,000; and


         (2)      on the earlier of the effective time of the merger and the
                  date on which Viacom pays 1999 bonuses to its executive
                  officers generally, the greatest of:

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                  .        110% of their respective bonuses received for 1998,

                  .        amounts which, when added to their salary and
                           deferred compensation payable for 1999, would produce
                           the highest 1999 total cash compensation paid to any
                           other executive officer of Viacom or any of its
                           affiliates, and

                  .        an amount the Viacom Board determines is appropriate
                           to compensate each executive for his contribution to
                           Viacom in 1999.

Assuming the merger were consummated on January 1, 2000 and the 1999 bonuses
were paid at 110%, it is estimated that each of Messrs. Dauman and Dooley would
each receive aggregate payments under (1) and (2) above (excluding any payouts
of deferred compensation accounts and Viacom Excess Investment Plan balances) of
approximately $41 million.

         All equity-based compensation awards previously granted to Messrs.
Dauman and Dooley will vest on the effective date of their resignation and each
stock option will continue to be exercisable in accordance with its terms until
December 31, 2003, subject to their compliance with the provisions of their
resignation agreements. In addition, Viacom will provide each of Messrs. Dauman
and Dooley with an office that is comparable in quality and size to his current
office at a location of his choice in midtown Manhattan, subject to Viacom's
approval, and a secretary until December 31, 2003, or until he obtains full time
employment, if earlier.

         Messrs. Dauman and Dooley will continue to participate in all savings,
retirement, welfare and fringe benefit plans of Viacom, or will receive the cash
equivalent of these benefits with an income tax gross up, through December 31,
2003, or, with respect to any welfare benefit, the date on which they become
entitled to comparable benefits through a subsequent employer, if earlier. Mr.
Dauman will also receive all additional service credit necessary to provide him
with 20 years of service under any Viacom plans for which that credit would
entitle him to additional benefits.

         In the event that either executive is terminated by Viacom without
"cause," or terminates his own employment for "good reason," as these terms are
defined in their respective agreements, prior to the effective time of the
merger, that executive will be entitled to all of the payments described above
promptly following his termination, except for the $5 million transaction bonus,
which will be paid at the effective time of the merger. If the merger agreement
is terminated or the transactions contemplated by the merger agreement are
abandoned, the Viacom Board will determine in its good faith discretion whether
to pay Mr. Dauman and Mr. Dooley all or any part of the $5 million transaction
bonus.

         The agreements provide for a gross-up payment to be made to Messrs.
Dauman and Dooley to eliminate the effects of any possible imposition under the
Internal Revenue Code of the "golden parachute" excise tax on any payment or
benefit they receive under their agreements or otherwise.

         Messrs. Dauman and Dooley will be bound by certain restrictive
covenants, including a noncompetition covenant that applies for one year
following their termination of employment.

         Executive Severance Plans. Viacom adopted executive severance plans
covering its approximately ten Senior Vice Presidents, which includes two Vice
Presidents who are treated as Senior Vice Presidents for this purpose, and 64
Vice Presidents that became effective on September 6, 1999 and continues in
effect for one year following the effective time of the merger. The benefits
provided under the executive severance plans are conditioned on the
participant's execution of a release

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in favor of Viacom and replace the severance benefits provided to participants
under their employment agreements with Viacom and any other Viacom severance
plan, program, policy or arrangement.

         Upon a termination of a participant's employment by Viacom without
"cause" or by the participant for "good reason," as those terms are defined in
the executive severance plans, Viacom will pay each participant a one-time cash
payment equal to the sum of any earned, unpaid base salary, automobile
allowance, vacation pay and pro-rated bonus through the date of termination and
the base salary, target bonus (prorated for partial years) and automobile
allowance he would have earned if he had remained employed for two years, in the
case of a Vice President, or three years, in the case of a Senior Vice
President. These payments will be made assuming increases in base salary and
bonus compensation consistent with the participant's existing employment
agreement and, after the expiration of such agreement, at an annualized rate
consistent with the last regular increase under the agreement. For participants
who do not have employment agreements and for participants whose employment
agreements did not specify a rate of increase, the salary increase shall be a
rate of increase, consistent with the participants's last regular increase, but
not in excess of 8% per year.

         All equity-based compensation awards previously granted to a
participant will vest on the date of his or her involuntary termination, and
each stock option will continue to be exercisable in accordance with its terms,
for two years, in the case of a Vice President, and three years, in the case of
a Senior Vice President, or through the option's original expiration date, if
earlier.

         Additionally, for two years following termination in the case of a Vice
President and three years following termination in the case of a Senior Vice
President, each participant will be entitled to participate in Viacom's medical,
dental and life insurance plans until he or she secures full-time employment
that provides him or her with comparable coverage, and will either be provided
with car insurance or be reimbursed for his or her car insurance.

         On the date of termination, participants will be:

         .        credited with age and service (two years for Vice Presidents,
                  three years for Senior Vice Presidents) for all purposes under
                  all qualified and non-qualified retirement plans of Viacom,
                  and

         .        credited with age and service (two years for Vice Presidents,
                  three years for Senior Vice Presidents) under Viacom's retiree
                  welfare benefit plans. Any increases in the annual amount
                  credited to the accounts of active employees will apply to the
                  participants.

         In the case of Senior Vice Presidents only, for a period of one year
following their termination, or, if earlier, until the participant secures full-
time employment, they will be provided with an office comparable in both quality
and size to the office they had prior to their termination, at a location of
their choice, subject to Viacom's consent. Viacom will bear the cost of
relocating the participant and will provide him or her with a secretary.

         Each participant will continue to be bound by the non-solicitation,
non-disparagement, confidentiality and cooperation with litigation covenants in
his existing employment agreement, but the noncompetition covenant in each of
the existing agreements will be waived by Viacom.

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         The executive severance plan provides for a gross-up payment to be made
to the participants to eliminate the effects of the imposition under the
Internal Revenue Code of the "golden parachute" excise tax, if any, on any
payment or benefit they may receive under the executive severance plans or
otherwise.

CBS

         Continuing Board Positions. Eight members of the CBS Board of
         ---------------------------
Directors, to be designated by the CBS Board prior to the effective time of the
merger, will become members of the Viacom Board as of the effective time of the
merger. One of the eight will be Mr. Karmazin.

         Stock Options. At ., approximately . shares of CBS common stock were
         --------------
subject to options granted to executive officers and directors under
compensatory equity-based plans of CBS. With certain exceptions, all of these
outstanding CBS stock options that have not yet become exercisable, other than
stock options granted on or after July 28, 1999, will become exercisable as a
result of the merger. As of ., 1999, . CBS options were outstanding of which .
were exercisable.

         Restricted Stock. At ., approximately . shares of CBS common stock had
         -----------------
been granted to executive officers and directors in the form of restricted stock
awards under compensatory equity plans of CBS. All restrictions to which these
restricted stock awards are subject will lapse and will be deemed earned as a
result of the merger.

         Employment Agreement with Mr. Karmazin. In contemplation of the merger,
         ---------------------------------------
Viacom entered into an employment agreement with Mr. Karmazin that becomes
effective only upon the consummation of the merger, except for a stock "lock-up"
provision described below, which became effective upon the signing of the
employment agreement, and continues through December 31, 2003. Pursuant to the
agreement, Mr. Karmazin will serve as the President and COO of Viacom.

         Mr. Karmazin will receive an annual base salary of $1 million and an
annual bonus, with an established target bonus of $5 million and a maximum bonus
of $10 million for calendar year 2000, prorated to reflect the actual number of
days that the agreement is in effect during the year 2000, which target and
maximum amounts will increase by 10% annually. Mr. Karmazin will also receive
deferred compensation of $2 million during calendar year 2000, prorated to
reflect the number of days that the agreement is in effect during the year 2000,
thereafter to be increased annually during the remainder of his employment in an
amount equal to 10% of his salary and deferred compensation for the preceding
year. The agreement provides for a grant of options to purchase 2,000,000 shares
of Viacom Class B common stock, vesting in three equal annual installments.
During his employment term, Mr. Karmazin will be provided with $5 million of
life insurance. Mr. Karmazin will also be entitled to a gross-up for any "golden
parachute" excise tax that may be imposed on him under the Internal Revenue Code
as a result of any payment or benefit he receives under his agreement or
otherwise.

         The agreement provides that Mr. Karmazin will not, except in limited
circumstances, sell or otherwise dispose of his shares of CBS common stock, or,
following the merger, Viacom stock for the period beginning September 6, 1999,
the date the agreement was signed, and ending three years after the effective
time of the merger.

         In the event of a termination of Mr. Karmazin's employment without
"cause" or his voluntary resignation for "good reason," as such terms are
defined in his employment agreement, during the

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employment term Mr. Karmazin will be entitled to receive salary, bonus, deferred
compensation, perquisites, medical and dental coverage, life insurance coverage
for the balance of the employment term, a supplemental pension benefit under
Viacom's Excess Pension Plan and an office including secretarial assistance for
up to six months after his employment terminates. Also upon such termination,
Mr. Karmazin's stock options including options that would have vested during the
employment term will remain exercisable for six months following the date of
termination but not beyond their expiration dates.

         CBS has the right under the merger agreement to establish retention,
severance and compensation arrangements for its officers and employees which are
similar to the retention and severance arrangements described above in
"Interests of Certain Persons in the Merger--Viacom" provided that the aggregate
cost of such CBS arrangements does not materially exceed the aggregate cost of
Viacom's similar arrangements. At present, CBS has not made any final
determination as to the types of arrangements which it may establish or the
officers or other employees who will be eligible to participate in such
arrangements.

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                                  THE COMPANIES

Viacom's Business

         Viacom is a diversified entertainment company with operations in six
segments: (i) Networks, (ii) Entertainment, (iii) Video, (iv) Parks, (v)
Publishing and (vi) Online. Approximately 18% of Blockbuster's common stock was
recently sold to the public.

         Networks

         Viacom owns and operates advertiser-supported basic cable television
program services and premium subscription television program services in the
United States and internationally. Viacom's MTV Networks division includes such
owned and operated program services as:

         .        MTV:  MUSIC TELEVISION in the United States, Europe and
                  Latin America;

         .        NICKELODEON in the United States, Latin America, Scandinavia,
                  Japan and the Commonwealth of Independent States;

         .        NICK AT NITE in the United States;

         .        VH1 Music First in the United States, United Kingdom and
                  Germany;

         .        MTV's spin-off, MTV2 in the United States and Europe; and

         .        TV LAND in the United States.

         Viacom's MTV Networks division also participates in program services as
a joint venturer, including MTV in Asia and Brazil and NICKELODEON in the United
Kingdom and Australia.

         Viacom's Showtime Networks Inc. subsidiary owns and operates SHOWTIME,
THE MOVIE CHANNEL/TM/, and FLIX/(R)/, and is a joint venture partner in and
manager of the SUNDANCE CHANNEL/(R)/. Also, Viacom is a joint venture partner in
(a) COMEDY CENTRAL/(R)/, an advertiser-supported basic cable program service in
the United States, (b) GULF DTH LDC, a satellite direct-to-home platform
offering programming in the Middle East and (c) NOGGIN/TM/, a
subscription-supported, non-commercial children's educational program service,
which is distributed by cable and satellite and includes a related online
service.

         Entertainment

         The principal businesses of Viacom's Entertainment segment are:

         .        PARAMOUNT PICTURES, which produces, acquires and distributes
                  feature-length motion pictures;

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         .        PARAMOUNT HOME VIDEO, which distributes motion pictures and
                  television product produced by Paramount and third parties on
                  videocassette and disc in the U.S. and Canada;

         .        PARAMOUNT TELEVISION, VIACOM PRODUCTIONS, SPELLING TELEVISION
                  and BIG TICKET TELEVISION, which produce, acquire and
                  distribute series, miniseries, specials and
                  made-for-television movies primarily for network television,
                  first-run syndication, pay television and basic cable
                  television;

         .        THE PARAMOUNT STATIONS GROUP, which owns and operates 17
                  television stations and programs two additional stations
                  pursuant to local marketing agreements;

         .        FAMOUS PLAYERS, which owns and operates movie theatres in
                  Canada; and

         .        FAMOUS MUSIC, a music publisher.

         Additionally, the Company has joint venture interests in television
broadcasting, international motion picture and video distribution and television
programming services, including:

         .        UNITED PARAMOUNT NETWORK, in which the Company is a 50% joint
                  venture partner. Pursuant to current FCC regulations, Viacom
                  may not be permitted to maintain its 50% ownership interest
                  together with ownership of the CBS network;

         .        UNITED INTERNATIONAL PICTURES (UIP); the Company owns a
                  one-third interest in this venture which distributes
                  Paramount's, Universal's and MGM's motion pictures outside the
                  U.S. and Canada. MGM announced this year that it intends to
                  withdraw from UIP effective October 31, 2000;

         .        UNITED CINEMAS INTERNATIONAL (UCI); the Company owns a 50%
                  interest in this venture which owns and operates movie
                  theatres in Europe, Latin America and Asia; and

         .        CINEMA INTERNATIONAL B.V. (CIBV), in which the Company
                  currently is a 50% joint venture partner but has agreed to
                  become the sole owner, which distributes Paramount's motion
                  pictures on videocassette and disc outside the U.S. and Canada
                  and acquires and distributes motion pictures and television
                  product produced by third parties.

         .        Various international television programming services,
                  including the Movie Channel Middle East and the Paramount
                  Comedy Channel in the UK.

         Video

         The Company operates the home video and video game rental and retailing
business through BLOCKBUSTER INC. As of December 31, 1998, the Company operated
or franchised approximately 6,380 stores in the U.S., its territories and 25
other countries. BLOCKBUSTER offers titles primarily for rental and also offers
titles for purchase on a "sell-through" and previously viewed basis. During
1998, BLOCKBUSTER implemented revenue-sharing arrangements directly with major
motion picture

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studios, including PARAMOUNT PICTURES, thereby increasing the availability of
newly released videos in its domestic stores. In all of its domestic stores and
many of its stores outside of the U.S., BLOCKBUSTER rents video games and sells
previously played video games. In addition, in several hundred domestic stores
and certain international markets, BLOCKBUSTER rents and sells digital versatile
discs and rents DVD players.

         Parks

         Through PARAMOUNT PARKS, Viacom owns and operates five regional theme
parks and a themed attraction in the United States and Canada. Each of the theme
parks features attractions based on Viacom's intellectual properties.

         Publishing

         Through SIMON & SCHUSTER, Viacom publishes and distributes consumer
hardcover books, trade paperbacks, mass-market paperbacks, children's books,
audiobooks, electronic books and CD-ROM products in the United States and
internationally. SIMON & SCHUSTER's flagship imprints include SIMON & SCHUSTER,
POCKET BOOKS, SCRIBNER, and THE FREE PRESS. SIMON & SCHUSTER also develops
special imprints and publishes titles based on MTV, NICKELODEON and PARAMOUNT
PICTURES products. SIMON & SCHUSTER distributes its products directly and
through third parties. SIMON & SCHUSTER also delivers content and sells products
on Internet Web sites operated by various imprints or linked to individual
titles.

         Online

         Viacom operates Internet sites which are targeted to the current
audiences of its various MTV, VH1 and NICKELODEON program services, including
NOGGIN, as well as to new audiences such as those who do not receive cable or
direct-to-home satellite services. In addition to providing entertainment and
information on such Internet sites, Viacom also sells its own licensed and third
party merchandise.

CBS' Business

         CBS is one of the largest radio and television broadcasters in the
United States. CBS operates its businesses through its Television, Cable and
Infinity segments. The Television segment consists of CBS' 15 owned and operated
television stations, which are located in seven of the nation's ten largest
markets, and the CBS television network. The CBS television network operations
are subdivided into five areas: entertainment; news; sports; enterprises, which
produces, distributes and markets first-run and off-network programming; and new
media consisting of CBS' Internet businesses. CBS' Cable segment consists of
CBS' cable networks, including The Nashville Network, Country Music Television
and two regional sports networks and a global provider of satellite services to
broadcast, cable and corporate networks. The Infinity segment corresponds to
CBS' majority owned subsidiary, Infinity Broadcasting Corporation, which
conducts CBS' radio and outdoor advertising businesses.

         Infinity Broadcasting Corporation owns and operates approximately 160
AM and FM radio stations located in 35 markets. TDI Worldwide, Inc., a wholly
owned subsidiary of Infinity, is one of the largest outdoor advertising
companies in the United States and sells space on various media,

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including buses, trains, train platforms and terminals throughout commuter rail
systems and on painted billboards and phone kiosks.

         CBS' Internet businesses, which consist primarily of its operation of
the Internet sites CBS.com and Country.com, also include CBS' minority
investments in three public companies, SportsLine USA, Inc. (NASDAQ: SPLN),
which publishes several sports Internet sites, including CBS.SportsLine.com,
MarketWatch.com, Inc. (NASDAQ: MKTW), which publishes the Internet site
CBS.MarketWatch.com. and Medscape Inc. (NASDAQ: MSCP), which publishes a
consumer health Internet site. CBS' other Internet investments include
Storerunner, Inc., Office.com, Inc., Switchboard, Inc., ThirdAge Media, Inc.,
Intelligent Systems for Retail, Inc., which operates Webvan.com, Jobs.com, Inc.,
Medscape Inc., Women's Consumer Network LLC. and Wrenchead.com, Inc., as well as
its majority interest in the Internet portal operated by iWon, Inc. CBS has also
entered into definitive agreements to acquire equity interests in Big E
Entertainment (NASDAQ: BIGE), which operates Hollywood.com, and Rx.com, Inc., a
leading Internet retail pharmacy.

         In addition to the acquisitions listed above, on March 31, 1999, CBS
entered into a definitive merger agreement with King World Productions, Inc.
King World is the distributor of a number of shows, including "The Oprah Winfrey
Show," "Wheel of Fortune," "Jeopardy!" and "Hollywood Squares." The consummation
of the merger with King World is subject to certain conditions, including
approval by King World stockholders. On April 12, 1999, CBS announced its
agreement with Gaylord Entertainment Company pursuant to which CBS will acquire
television broadcast station KTVT-TV Dallas-Fort Worth, Texas. On May 27, 1999,
Infinity entered into a definitive agreement to acquire Outdoor Systems, Inc.
Outdoor Systems is the largest outdoor advertising company in North America,
operating bulletin, poster, mall and transit advertising display faces in the
United States, Canada and Mexico. The consummation of the merger with Outdoor
Systems is subject to certain conditions including approval by Outdoor Systems
and Infinity shareholders and review by certain regulatory bodies. CBS believes
that the completion of King World, Outdoor Systems and KTVT-TV transactions will
occur by the end of 1999.

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                  REGULATORY MATTERS AND THIRD-PARTY APPROVALS

Antitrust

         Viacom and CBS each have filed a Premerger Notification and Report Form
for review under the HSR Act with the Federal Trade Commission and the Antitrust
Division of the United States Department of Justice. The HSR Act provides for an
initial 30 calendar day waiting period following the filing by the parties of
the Premerger Notification and Report Forms before the merger may be
consummated. Viacom made its filing on September 20, 1999 and CBS made its
filing on September 23, 1999. However, the Antitrust Division of the Department
of Justice and the Federal Trade Commission continue to have the authority to
challenge the merger on antitrust grounds before and after the merger is
completed. The HSR Act further provides that if, within the initial 30 calendar
day waiting period, the Federal Trade Commission or the Department of Justice
issues a request for additional information or documents, the waiting period
will be extended until 11:59 p.m. on the twentieth day after the date of
substantial compliance by both filing parties with the request.

         Viacom and CBS conduct operations in a number of foreign countries
where regulatory filings or approvals with applicable authorities will be
required in connection with the consummation of the merger.

         At a minimum, premerger notification filings with national antitrust
authorities will be required in the following foreign jurisdictions: Brazil,
Canada, Germany, Ireland, Japan, The Netherlands and South Africa. A
post-closing submission will be required with the antitrust authorities in
Austria. The Brazilian antitrust filing was made on September 28, 1999. The
Irish antitrust filing was made on October 6, 1999. The required premerger
filings with the antitrust authorities in the remaining jurisdictions are
expected to be made promptly.

         Consummation of the merger is conditioned upon, among other things, the
absence of any preliminary or permanent injunction or other order issued by any
federal or state court of competent jurisdiction which prohibits or restricts
the consummation of the merger. Viacom and CBS believe that all material filings
and approvals have been made or obtained, or will be made or obtained, as the
case may be.

Federal Regulation of Television and Radio Broadcasting

         General. Television and radio broadcasting are subject to the
jurisdiction of the Federal Communications Commission under the Communications
Act of 1934, as amended, most recently amended further by the Telecommunications
Act of 1996. The Communications Act prohibits the operation of broadcasting
stations except under a license issued by the FCC and empowers the FCC, among
other actions, to issue, renew, revoke and modify broadcasting licenses; assign
frequency bands; determine stations' frequencies, locations and operating power;
regulate some of the equipment used by stations; adopt other regulations to
carry out the provisions of the Communications Act; impose penalties for
violation of such regulations; and impose annual fees as well as fees for
processing applications and other administrative functions. Under the
Communications Act, the FCC also regulates certain aspects of the operation of
cable television systems and other electronic media that compete with broadcast
stations.

         The Communications Act prohibits the assignment of a broadcast license
or the transfer of control of a licensee without prior approval of the FCC. The
merger is subject to such FCC approval

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of the transfer of control of CBS and its various licensee subsidiaries to
Viacom. Because the application for transfer of control of CBS will involve a
substantial change in ownership or control, the application must be placed on
public notice for a period of no less than 30 days during which time petitions
to deny the application may be filed by the public. If the FCC grants the
application, interested parties would have 30 days from the date of public
notice of the grant to seek reconsideration or review of that grant by the full
commission, or as the case may be, a court of competent jurisdiction. The full
commission has an additional 10 days to set aside on its own motion any action
taken by the FCC's staff, if action on the application were made in the first
instance by the staff of the FCC; if action is made in the first instance by the
full commission, the full commission may set aside its own action within 30 days
of public notice of such action. When passing on an assignment or transfer
application, the FCC is prohibited from considering whether the public interest
might be served by an assignment or transfer to any party other than the
assignee or transferee specified in the application.

         License Renewals. Under the Telecommunications Act, the FCC is
authorized to renew broadcast licenses for terms of up to eight years. The
Telecommunications Act requires renewal of a broadcast license if the FCC finds
that (i) the station has served the public interest, convenience and necessity;
(ii) there have been no serious violations of either the Communications Act or
the FCC's rules and regulations by the licensee; and (iii) there have been no
other serious violations that taken together constitute a pattern of abuse. In
making its determination, the FCC may consider petitions to deny but cannot
consider whether the public interest would be better served by a person other
than the renewal applicant. Under the Telecommunications Act, competing
applications for the same frequency may be accepted only after the FCC has
denied an incumbent's application for renewal of license. Applications for
renewal of licenses for one television station owned by CBS and 10 radio
stations owned by Infinity are currently pending before the FCC. Petitions to
deny were filed against the renewal applications of seven of the radio stations;
however, CBS continues to believe that it will receive renewal of these
licenses.

         Ownership Regulation. The Communications Act, FCC rules and regulations
and the Telecommunications Act also regulate broadcast ownership. The FCC has
promulgated rules that, among other matters, limit the ability of individuals
and entities to own or have an official position or ownership interest (an
"attributable" interest) above a certain level in broadcast stations as well as
other specified mass media entities. As detailed below, in August 1999, the FCC
substantially revised a number of its multiple ownership and attribution rules.
However, these rules will not become effective until November 16, 1999 and may
still be modified or reconsidered in subsequent proceedings. In three separate
orders, the FCC revised its rules regarding restrictions on television
ownership, radio-television cross-ownership, and attribution of broadcast
ownership interests. The three orders, which resolve a number of rulemaking
proceedings launched at the beginning of the decade, take into consideration
mandates included in the Telecommunications Act, which liberalized the radio
ownership rules and directed the FCC to consider similar deregulation for
television. The FCC's various broadcast ownership rules, inclusive of the recent
revisions, are summarized below:

         Local Radio Ownership. With respect to radio licenses, the maximum
allowable number of stations that can be commonly owned in a market varies
depending on the number of radio stations within that market, as determined
using a method prescribed by the FCC. In large markets, i.e., markets with more
than 45 stations, one company may own, operate or control up to eight radio
stations, with no more than five in any one service (AM or FM).

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         Local Television Ownership. The so-called "TV duopoly" rule has until
recently prohibited common ownership or control of two television stations with
overlapping Grade B signal contours, irrespective of the stations' markets. The
FCC's new TV duopoly rule embodies a market-based test which permits parties to
own two TV stations without regard to contour overlap provided they are located
in separate markets (also referred to as "Designated Market Areas," or "DMAs").
In addition, the new rules permit parties in larger DMAs to own up to two
television stations in the same DMA so long as at least eight independently
owned and operating full-power television stations remain in the market and at
least one of the two stations is not among the top four-ranked stations in the
market based on audience share. In addition, without regard to numbers of
remaining or independently owned TV stations, the FCC will permit television
duopolies within the same DMA so long as the predicted Grade B signal contours
of the stations involved do not overlap. Satellite stations (i.e., stations
which simply rebroadcast the programming of a "parent" station) will continue to
be exempt from the duopoly rule if located in the same DMA as the "parent"
station. The duopoly rule also applies to same-market local marketing
agreements, a form of time brokerage also known as LMAs, involving more than 15%
of the brokered station's program time, although current LMAs will be exempt
from the TV duopoly rule for a limited period of time (either two or five years,
depending on the date of the adoption of the LMA). Further, the FCC may grant a
waiver of the TV duopoly rule if one of the two television stations is a
"failed" or "failing" station, or the proposed transaction would result in the
construction of a new television station.

         Following consummation of the merger, and exclusive of other
acquisitions, the combined company could potentially have duopolies in the
following six television markets: Philadelphia, Boston, Dallas, Miami, Detroit,
and Pittsburgh. While the combined company will seek to maintain ownership of
the television stations in these markets under the new television duopoly rules,
there can be no assurance that the combined company will be able to retain two
television stations in each of the duopoly markets. On November 16, 1999, the
first date applications can be filed proposing duopolies under the revised TV
duopoly rule, more than one application might be filed relating to stations in
these markets, all of which may not be able to be granted because of the
requirement that eight independent voices must remain in the market. The FCC has
proposed that in such situations, random selection be employed to determine the
order in which the simultaneously filed applications will be processed.

         National Television Ownership Cap. On the national level, the FCC
imposes a 35 percent national audience reach cap for television ownership, under
which one party may not have an attributable interest in television stations
which reach more than 35 percent of all U.S. television households. The
Commission discounts the audience reach of a UHF station for this purpose by 50
percent. The FCC will consider whether to change the national ownership cap and
the "UHF discount" as part of the biennial review of its broadcast ownership
rules initiated in 1998. Additionally, under the new FCC rules, for entities
that have attributable interests in two stations in the same market, the FCC
counts the audience reach of that market only once for national cap purposes.

         The television stations currently held by Viacom and CBS would have an
aggregate national audience reach for purposes of the national ownership cap of
approximately 41%. As these stations would exceed the FCC's 35% national
ownership cap under the merger, it will be necessary, absent legislative or
regulatory relief, to divest certain television stations in order to comply with
the national ownership cap.

         Dual Network Rule. In the Telecommunications Act, Congress directed the
FCC to liberalize its rule, which then generally prohibited television stations
from affiliating with an entity that

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maintained more than one national network. The FCC's implementing regulation
states that a television broadcast station may not affiliate with an entity that
maintains one of the existing four major networks (ABC, CBS, NBC, and Fox) and
one of certain other qualifying networks in existence as of February 8, 1996.
The legislative history of the dual network rule suggests that the rule was
intended to prohibit one of the four major networks from acquiring either of The
WB or United Paramount Network. The FCC is reviewing this rule as part of the
biennial review.

         Although the acquisition of an ownership interest in CBS will be
reviewed by the FCC under the dual network rule, the FCC regulations do not
identify the amount and nature of the ownership interest required to trigger the
dual network prohibition. Accordingly, it is possible that, absent either
legislative or regulatory relief, the combined company might be required to
divest some or all of Viacom's 50% interest in United Paramount Network.

         Radio-Television Cross Ownership. The so-called "one-to-a-market" rule
has until recently prohibited common ownership or control of a radio station
(either AM, FM or both) and a television station in the same market, subject to
waivers in some circumstances. The FCC's new radio-television cross-ownership
rule embodies a graduated test based on the number of independently owned media
voices in the local market. In large markets, i.e., markets with at least 20
independently owned media voices, a single entity can own up to one television
station and seven radio stations or, if permissible under the new TV duopoly
rule, two television stations and six radio stations.

         Under the FCC's new rules, waivers of the one-to-a-market rule will be
granted only under the failed station test. Unlike under the TV duopoly rule,
the FCC will not waive the radio-television cross-ownership rules in situations
of failing or unbuilt stations.

         In accordance with the schedule imposed by the FCC for comments under
the proposed FCC rules, by November 16, 1999, licensees with existing
conditional waivers of the one-to-a-market rule must demonstrate to the FCC
their compliance or non-compliance with the new rule. The FCC's Mass Media
Bureau will replace these waivers with permanent approvals as appropriate.
Existing conditional waivers which do not comply with the new rule will be
extended until the conclusion of the FCC's biennial review in 2004; the same
grandfathering relief will be afforded to pending applications for conditional
waivers filed on or before July 29, 1999, which are ultimately granted by the
Commission. Any application proposing a radio/television combination filed after
that date must comply with the new rules. Also, the grandfathered status of
radio/TV combinations will terminate upon an assignment or transfer of control.

         While CBS currently holds conditional temporary waivers granted under
the prior FCC one-to-a-market rule allowing CBS to operate station combinations
of one TV station and up to eight radio stations in numerous markets, the
"grandfathered" status of the combinations will end as a result of the merger.
Under the new FCC one-to-a-market rule, the combined company exceeds radio-
television cross-ownership caps and may need to divest up to an aggregate of 12
radio stations in Los Angeles, Chicago, Dallas, Washington/Baltimore and
Sacramento.

         Attribution of Ownership. Under the FCC's recently revised attribution
rules, a direct or indirect purchaser of certain types of securities of the
combined company could violate FCC regulations or policies if that purchaser
owned or acquired an "attributable" interest in other media properties in the
same area as stations owned by the combined company in a manner prohibited by
the FCC. Under the FCC's revised rules, an "attributable" interest for purposes
of the Commission's

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broadcast ownership rules generally includes (1) equity (voting and non-voting)
and debt interests ("equity/debt plus"), which combined exceed 33% of a
licensee's total assets, if the interest holder is a "major program supplier" to
a licensee (supplying more than 15% of total weekly programming), or a same-
market media entity (TV, radio, cable or newspaper); (2) 5% or greater voting
stock interest (however, equity interests up to 49% are nonattributable if the
licensee is controlled by a single majority shareholder and the interest holder
is not otherwise attributable under the "equity/debt plus" standard); (3) 20% or
greater voting stock interest, if the holder is a qualified passive investor
(bank trust department, mutual fund or insurance company); (4) any equity
interest in a limited liability company or limited partnership (unless properly
"insulated" from management activities); and (5) all officers and directors of a
licensee and its direct or indirect parent.

         Under the new rules, all non-conforming interests acquired before
November 7, 1996 are permanently grandfathered and thus do not constitute
attributable ownership interests. Any nonconforming interests acquired after
that date need to be brought into compliance by August 5, 2000.

         Alien Ownership. The Communications Act restricts the ability of
foreign entities or individuals to own or hold certain interests in broadcast
licenses. As applicable to the combined company, non-U.S. citizens,
collectively, may directly or indirectly own or vote up to twenty percent of the
capital stock of a corporate licensee. In addition, a broadcast license may not
be granted to or held by any corporation that is controlled, directly or
indirectly, by any other corporation more than one-fourth of whose capital stock
is owned or voted by non-U.S. citizens or their representatives, by foreign
governments or their representatives, or by non-U.S. corporations, if the FCC
finds that the public interest will be served by the refusal or revocation of
such license. The FCC has interpreted this provision of the Communications Act
to require an affirmative public interest finding before a broadcast license may
be granted to or held by any such corporation, and the FCC has made such
affirmative findings only in limited circumstances.

Other Regulations, Legislation and Recent Developments Affecting Broadcast
Stations

         Digital Television Service. The FCC has taken a number of steps to
implement digital television broadcasting service in the United States. The FCC
has adopted a digital television table of allotments that provides all
authorized television stations with a second channel on which to broadcast a
digital television signal. The FCC has attempted to provide digital television
coverage areas that are comparable to stations' existing service areas. The FCC
has ruled that television broadcast licensees may use their digital channels for
a wide variety of services such as high-definition television, multiple channels
of standard definition television programming, audio, data, and other types of
communications, subject to the requirement that each broadcaster provide at
least one free video channel equal in quality to the current technical standard.

         Digital television channels will generally be located in the range of
channels from channel 2 through channel 51. The FCC has required affiliates of
ABC, CBS, Fox and NBC in the top 10 television markets begin digital
broadcasting by May 1, 1999. Many stations, including several of the combined
company's stations, have already begun digital broadcasting. Affiliates of the
four major networks in the top 30 markets must begin digital broadcasting by
November 1, 1999, and all other commercial broadcasters must do so by May 1,
2002.

         The FCC's plan calls for the digital television transition period to
end in the year 2006, at which time the FCC expects that television broadcasters
will cease non-digital broadcasting and return

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one of their two channels to the government, allowing that spectrum to be
recovered for other uses. Under the Balanced Budget Act, however, the FCC is
authorized to extend the December 31, 2006 deadline for reclamation of a
television station's non-digital channel if, in any given market one or more
television stations affiliated with ABC, CBS, NBC or Fox is not broadcasting
digitally, and the FCC determines that such stations have "exercised due
diligence" in attempting to convert to digital broadcasting; or less than 85% of
the television households in the station's market subscribe to a multichannel
video service that carries at least one digital channel from each of the local
stations in that market, and less than 85% of the television households in the
market can receive digital signals off the air using either a set-top converter
box for an analog television set or a new digital television set.

         The FCC is currently considering whether cable television system
operators should be required to carry stations' digital television signals in
addition to the currently required carriage of stations' analog signals. In July
1998, the FCC issued a Notice of Proposed Rulemaking posing several different
options for the carriage of digital signals and solicited comments from all
interested parties. The FCC has yet to issue a decision on this matter.

         The implementation of digital television will also impose substantial
additional costs on television stations because of the need to replace equipment
and because some stations will need to operate at higher utility costs and there
can be no assurance that our television stations will be able to increase
revenue to offset such costs. The FCC is also considering imposing new public
interest requirements on television licensees in exchange for their receipt of
digital television channels. In addition, the Telecommunications Act allows the
FCC to charge a spectrum fee to broadcasters who use the digital spectrum to
offer subscription-based services. The FCC has adopted rules that require
broadcasters to pay a fee of 5% of gross revenues received from ancillary or
supplementary uses of the digital spectrum for which they charge subscription
fees, excluding revenues from the sale of commercial time. Neither Viacom nor
CBS can predict what future actions the FCC might take with respect to digital
television, nor can either company predict the effect of the FCC's present
digital television implementation plan or such future actions on the combined
company's business. The combined company will incur considerable expense in the
conversion to digital television and is unable to predict the extent or timing
of consumer demand for any such digital television services.

         Digital Audio Radio Service and Low-Power FM. The Commission has
authorized or is considering various digital audio radio services ("DARS"). In
January 1995, the Commission adopted rules to allocate spectrum for satellite
DARS. The Commission has issued two authorizations to launch and operate
satellite DARS. The FCC also has undertaken an inquiry into the terrestrial
broadcast of DARS signals, including a conversion to in-band on-channel
transmissions by existing radio broadcasters. Neither Viacom nor CBS can predict
the impact of either satellite or terrestrial DARS on its business. CBS has a
significant ownership interest in USA Digital Radio, Inc., which is developing
an in-band on-channel terrestrial DARS technology.

         In addition, the FCC recently proposed the creation of a new low-power
FM ("LPFM") radio service that would operate in the existing FM band. The
Commission is in the process of collecting comments on this proposal and at this
time neither Viacom nor CBS can predict either the outcome of this proceeding or
the impact, if any, that LPFM might have on the combined company's broadcast
operations.

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Internet

         Federal, state and international laws and regulations either in effect
or under consideration that govern interactive or online communications prohibit
the transmission of obscene, indecent, or otherwise unlawful communications and
impose restrictions on the collection, use, and disclosure of personally
identifiable information about both children and adults. Such prohibitions and
restrictions could affect the business and operations of the combined company.
In addition, certain of the businesses operated by CBS and Viacom permit online
users to post and access content and to communicate through a web site or
comparable vehicle. In some instances, the material posted or communicated by
third parties may infringe the copyrights or trademarks of others, be subject to
libel, fraud, or other claims, or otherwise be actionable. Although Federal
legislation limits the liability of web site operators for copyright
infringement and certain other civil claims by users of their systems, the
precise contours of these limitations are not yet clear. Similarly, the combined
company may face claims of liability by third parties who believe users of the
combined company's web sites infringe their interests and there can be no
assurance any such liabilities will not have an adverse effect on the combined
company's businesses or operations.

         Certain businesses operated by both CBS and Viacom permit users to
perform musical works and sound recordings over the Internet. The owners of the
copyrights in the performed musical works and the sound recordings may be
entitled to receive license fees for some or all of these performances. Further,
license fees may need to be paid for the copies of the works that are stored on
the combined company's servers to facilitate such performances. Certain of these
fees have not yet been set, and there can be no assurance that such fees will
not have an adverse effect on the combined company's businesses or operations.

         Proposals for additional or revised statutory or regulatory
requirements are considered by Congress, the FTC, the FCC, other Federal
agencies, and state and local governments from time to time, and a number of
such proposals are under consideration at this time. Moreover, both the FTC and
state attorneys general are actively monitoring online offerings in connection
with consumer protection concerns. It is possible that certain of the provisions
and requirements described herein are now, and in the future may be, the subject
of Federal or state legislation, agency proceedings or court litigation. It is
not possible to predict what legal, legislative, regulatory or judicial changes,
if any, may occur or their impact on the combined company's businesses or
operations.

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            DESCRIPTION OF VIACOM CAPITAL STOCK FOLLOWING THE MERGER

         The following summary of the terms of the capital stock of Viacom
following the merger does not purport to be complete and is qualified in its
entirety by reference to Viacom's proposed new Restated Certificate of
Incorporation, attached to this joint proxy statement/prospectus as Annex B,
Viacom's amended By-laws, attached to this joint proxy statement/prospectus as
Annex C, the DGCL and the merger agreement.

         The authorized capital stock of Viacom consists of 500 million shares
of Viacom Class A common stock, three billion shares of Viacom Class B common
stock and 200 million shares of preferred stock, par value $0.01 per share,
issuable in series.

Viacom Class A Common Stock

         As of September ., 1999, the most recent practicable date prior to the
printing of this joint proxy statement/prospectus, there were 139,923,921 shares
of Viacom Class A common stock issued and outstanding. All outstanding shares of
Viacom Class A common stock are fully paid and non-assessable. Shares of Viacom
Class A common stock are not redeemable. Holders of shares of Viacom Class A
common stock are entitled to one vote per share.

         So long as there are 10,000 shares of Viacom Class A common stock
outstanding, each record holder of shares of Viacom Class A common stock may
convert any or all of its shares into an equal number of shares of Viacom Class
B common stock.

Viacom Class B Common Stock

         Viacom Class B common stock has rights, privileges, limitations,
restrictions and qualifications identical to Viacom Class A common stock except
that shares of Viacom Class B common stock have no voting rights other than
those required by the DGCL. As of October ., 1999, the most recent practicable
date prior to the printing of this joint proxy statement/prospectus, there were
605,085,135 shares of Viacom Class B common stock issued and outstanding. All
outstanding shares of Viacom Class B common stock are fully paid and
non-assessable. Shares of Viacom Class B common stock are not redeemable.

Voting and Other Rights of Viacom Common Stock

         Voting Rights. Under Viacom's proposed new Restated Certificate of
Incorporation, except as noted below or otherwise required by the DGCL, holders
of the outstanding shares of Viacom Class A common stock vote together with the
holders of the outstanding shares of all other classes of capital stock of
Viacom entitled to vote, without regard to class. At the present time, however,
there are no outstanding shares of any other class of capital stock of Viacom
entitled to vote. Under Viacom's proposed new Restated Certificate of
Incorporation (1) each holder of an outstanding share of Viacom Class A common
stock is entitled to cast one vote for each share registered in the name of the
holder and (2) the affirmative vote of the holders of a majority of the
outstanding shares of Viacom Class A common stock is necessary to approve any
consolidation or merger of Viacom with or into another corporation pursuant to
which shares of Viacom Class A common stock would be converted into or exchanged
for any securities or other consideration.

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         A holder of an outstanding share of Viacom Class B common stock is not
entitled, except as may be required by the DGCL, to vote on any question
presented to the shareholders of Viacom, including but not limited to whether to
increase or decrease, but not below the number of shares then outstanding, the
number of authorized shares of Viacom Class B common stock. Subject to the
preceding sentence, any future change in the number of authorized shares of
Viacom Class B common stock or any consolidation or merger of Viacom with or
into another corporation pursuant to which shares of Viacom Class B common stock
would be converted into or exchanged for any securities or other consideration
could be consummated with the approval of the holders of a majority of the
outstanding shares of Viacom Class A common stock and without any action by the
holders of shares of Viacom Class B common stock.

         Dividends. Subject to the rights and preferences of any outstanding
preferred stock, dividends on Viacom Class A common stock and Viacom Class B
common stock are payable out of the funds of Viacom legally available therefor
when, as and if declared by the Viacom Board.

         Rights in Liquidation. In the event Viacom is liquidated, dissolved or
wound up, whether voluntarily or involuntarily, the net assets of Viacom would
be divided ratably among the holders of the then outstanding shares of Viacom
Class A common stock and Viacom Class B common stock after payment or provision
for payment of the full preferential amounts to which the holders of any series
of preferred stock of Viacom then issued and outstanding would be entitled.

         Split, Subdivision or Combination. If Viacom splits, subdivides or
combines the outstanding shares of Viacom Class A common stock or Viacom Class B
common stock, the outstanding shares of the other class of Viacom common stock
shall be proportionally split, subdivided or combined in the same manner and on
the same basis as the outstanding shares of the other class of Viacom common
stock have been split, subdivided or combined.

         Preemptive Rights. Shares of Viacom Class A common stock and Viacom
Class B common stock do not entitle a holder to any preemptive rights enabling a
holder to subscribe for or receive shares of stock of any class or any other
securities convertible into shares of stock of any class of Viacom. The Viacom
Board possesses the power to issue shares of authorized but unissued Viacom
Class A common stock and Viacom Class B common stock without further shareholder
action, subject to the requirements of applicable law and stock exchanges,
unless National Amusements would no longer hold a majority of the outstanding
shares of voting stock of Viacom as a result of the issuance. The number of
authorized shares of Viacom Class A common stock and Viacom Class B common stock
could be increased with the approval of the holders of a majority of the
outstanding shares of Viacom Class A common stock and without any action by the
holders of shares of Viacom Class B common stock.

         Trading Market. The outstanding shares of Viacom Class A common stock
and Viacom Class B common stock are listed for trading on the NYSE. The
Registrar and Transfer Agent for Viacom common stock is The Bank of New York.

         Alien Ownership. Viacom's proposed new Restated Certificate of
Incorporation provides that Viacom may prohibit the ownership or voting of a
percentage of its equity securities in order to ensure compliance with the
requirements of the Communications Act.

Viacom Preferred Stock

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         Unless National Amusements would no longer hold a majority of the
outstanding shares of voting stock of Viacom as a result of the issuance, the
Viacom Board, without further action by the shareholders, is authorized to issue
preferred stock from time to time in one or more series, with such distinctive
serial designations as may be stated or expressed in the resolution or
resolutions providing for the issue of such stock adopted from time to time by
the Board of Directors; and in the resolution or resolutions providing for the
issuance of shares of each particular series, the Board of Directors is also
expressly authorized to fix: (1) the right to vote, if any; (2) the
consideration for which the shares of the series are to be issued; (3) the
number of shares constituting the series, which number may be increased (except
as otherwise fixed by the Board of Directors) or decreased (but not below the
number of shares then outstanding) from time to time by action of the Board of
Directors; (4) the rate of dividends and the times at which dividends will be
payable on the series and the preference, if any, which the dividends will have
relative to dividends payable on shares of any other preferred stock of Viacom;
(5) whether dividends will be cumulative or noncumulative, and, if cumulative,
the date or dates from which dividends will be cumulative; (6) the rights, if
any, of holders in the event of any voluntary or involuntary liquidation,
merger, consolidation, distribution or sale of assets, dissolution or winding up
of the affairs of Viacom; the rights, if any, of holders to convert the shares
into or exchange the shares for shares of any other preferred stock of Viacom or
for any debt securities of Viacom, and the terms and conditions, including price
and rate of exchange, of the conversion or exchange; (7) whether shares of the
series will be subject to redemption, and the redemption price or prices and
other terms or redemption, if any, including redemption prices payable in shares
of Viacom Class A common stock or Viacom Class B common stock; (8) the terms and
amounts of any sinking fund for the purchase or redemption of shares of the
series; and (9) any and all other powers, preferences and relative,
participating, optional or other special rights and qualifications, limitations
or restrictions pertaining to shares of the series permitted by law.

                                      113
<PAGE>

                       COMPARISON OF RIGHTS OF HOLDERS OF
                    VIACOM COMMON STOCK AND CBS COMMON STOCK

         The rights of Viacom shareholders are governed by Delaware law,
including the DGCL, and Viacom's current Restated Certificate of Incorporation
and By-laws. The rights of CBS shareholders are governed by Pennsylvania law,
including the Pennsylvania Business Corporation Law, and CBS' Restated Articles
of Incorporation and By-laws. Upon consummation of the merger, holders of shares
of CBS common stock will become holders of shares of Viacom non-voting Class B
common stock. Consequently, following the merger, Delaware law and Viacom's
proposed new Restated Certificate of Incorporation and its By-laws, both as
amended as a result of the merger, will govern the rights of former CBS
shareholders. Copies of Viacom's current Restated Certificate of Incorporation
and By-laws and CBS' Restated Articles of Incorporation and By-laws have been
filed with the SEC and will be sent to any shareholder of Viacom or CBS upon
request. Copies of Viacom's proposed new Restated Certificate of Incorporation
and By-laws, as they will be amended as a result of the merger, are attached as
Annexes B and C to this joint proxy statement/prospectus.

         A tabular comparison of shareholder rights of Viacom and CBS
shareholders both before and after the effective time of the merger is attached
to this joint proxy statement/prospectus as Annex J. Annex J is not intended to
be a complete statement of all differences or a complete description of the
specific provisions referred to in this summary, and the identification of
specific differences is not intended to indicate that other significant
differences do not exist. Other than voting rights, there is no difference
between the rights of holders of Viacom Class A common stock and Viacom Class B
common stock.

                                      114
<PAGE>

                              SHAREHOLDER PROPOSALS

         The Viacom board will consider proposals of shareholders intended to be
presented for action at Viacom's next (or, if the merger is completed, the
combined company's) annual meeting of shareholders. A shareholder proposal must
be submitted in writing and be received at Viacom's principal executive offices,
1515 Broadway, New York, NY 10036, Attn: Corporate Secretary. The deadline for
shareholders to submit proposals pursuant to Rule 14a-8 of the Securities
Exchange Act of 1934, as amended, for inclusion in Viacom's proxy statement and
form of proxy for the annual meeting is  .  . If a shareholder wishes to submit
notice of a proposal outside of the processes of Rule 14a-8 of the Securities
Exchange Act, the proposal must be submitted in writing and be received by
Viacom no later than  .  . If notice of a shareholder proposal submitted outside
of the processes of Rule 14a-8 of the Exchange Act is received by Viacom
after  .  , then Viacom's proxy for the annual meeting may confer discretionary
authority to vote on such matter without any discussion of such matter in the
proxy statement for the annual meeting.

         If the merger is not completed, CBS will hold a 2000 annual meeting of
shareholders. If such meeting is held, shareholders' proposals must be in
writing, addressed to the CBS Secretary, and received at the principal executive
offices of CBS on or before November 26, 1999, to be considered for inclusion in
the proxy materials relating to that meeting. Shareholder nominees or proposals
outside of the processes of Rule 14a-8 of the Exchange Act must be sent to the
CBS Secretary at the principal executive offices of CBS for receipt between
January 5, 2000 and February 4, 2000 and must include the information required
by CBS' By-laws. In the event the combination is completed, there will not be an
annual meeting of CBS in 2000.

                                  LEGAL MATTERS

         Certain legal matters with respect to the validity of the securities
offered hereby and the merger will be passed upon for Viacom by Michael D.
Fricklas, Esq., Senior Vice President, General Counsel and Secretary of Viacom.

                                     EXPERTS

         The consolidated financial statements of Viacom incorporated into this
document by reference to Viacom's Annual Report on Form 10-K for the year ended
December 31, 1998, have been so incorporated in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.

         The consolidated financial statements and the related financial
statement schedule of CBS, as of December 31, 1998 and 1997 and for each of the
years in the three year period ended December 31, 1998, incorporated by
reference in this joint proxy statement/prospectus from CBS' Annual Report on
Form 10-K for the year ended December 31, 1998, have been audited by KPMG LLP,
independent auditors, as stated in their reports, which are incorporated in this
document by reference, and have been so incorporated in reliance upon the
reports of such firm given upon their authority as experts in accounting and
auditing.

         The consolidated financial statements of King World incorporated in
this joint proxy statement/prospectus by reference from CBS' Current Report on
Form 8-K dated on or about October 8, 1999, have been audited by Arthur Andersen
LLP, independent public accountants, as indicated in

                                      115
<PAGE>

their report with respect thereto and is incorporated in this document by
reference in reliance upon the authority of said firm as experts in giving said
report.


                     WHERE YOU CAN FIND MORE INFORMATION AND
                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

         Viacom and CBS are subject to the informational requirements of the
Securities Exchange Act of 1934, as amended, and each accordingly files reports
and other information with the SEC. Reports, proxy statements and other
information filed by Viacom or CBS with the SEC can be inspected and copied at
the public reference facilities maintained by the SEC at Room 1024, 450 Fifth
Street, N.W., Washington, D.C. 20549 or at its regional offices located at Suite
1400, Northwestern Atrium Center, 500 West Madison Street, Chicago, Illinois
60661 and at Seven World Trade Center, 13th Floor, New York, New York 10048, and
copies of these materials can be obtained from the Public Reference Section of
the SEC, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates, or
by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains an Internet
site that contains reports, proxy statements and other information regarding
registrants that file electronically, such as Viacom and CBS. The address of the
SEC's Internet site is http://www.sec.gov.

         Viacom has filed a registration statement on Form S-4 under the
Securities Act of 1933, of which this joint proxy statement/prospectus forms a
part, relating to the Viacom Class B common stock to be issued in connection
with the merger. This joint proxy statement/prospectus does not contain all the
information set forth in the registration statement, certain portions of which
are omitted in accordance with the rules and regulations of the SEC. For further
information pertaining to Viacom, CBS and the Viacom Class B common stock,
reference is made to the registration statement and its exhibits. Statements
contained in this joint proxy statement/prospectus or in any document
incorporated in this joint proxy statement/prospectus by reference as to the
contents of any contract or other document referred to within this document or
other documents that are incorporated by reference are not necessarily complete
and, in each instance, reference is made to the copy of the applicable contract
or other document filed as an exhibit to the registration statement or otherwise
filed with the SEC. Each statement contained in this joint proxy
statement/prospectus is qualified in its entirety by reference to the underlying
documents.

         Viacom Class A and Class B common stock are listed on the NYSE and were
previously listed on the American Stock Exchange. Reports, proxy statements and
other information concerning Viacom can be inspected at the offices of the NYSE,
20 Broad Street, New York, New York 10005 and the American Stock Exchange, 86
Trinity Place, New York, New York 10006. CBS common stock is listed on the NYSE,
the Chicago Stock Exchange, the Boston Stock Exchange, the Philadelphia Stock
Exchange and the Pacific Stock Exchange. Reports, proxy statements and other
information concerning CBS can also be inspected at the offices of the NYSE.

         This joint proxy statement/prospectus incorporates documents by
reference that are not included as part of this document. Viacom and CBS
undertake to provide, without charge, to each person, including any beneficial
owner of Viacom Class A common stock, Viacom Class B common stock and CBS Common
Stock, to whom a copy of this joint proxy statement/prospectus has been
delivered, upon written or oral request, a copy of any and all of the documents
that have been incorporated into this document by reference, other than exhibits
to those documents unless the exhibits are specifically incorporated into this
document by reference. Requests for these documents should be

                                      116
<PAGE>

directed, in the case of documents relating to Viacom or any of its
subsidiaries, to Viacom Inc., 1515 Broadway, 53/rd/ Floor, New York, New York
10036, Attention: Investor Relations, phone number: (212) 258-6700, and, in the
case of documents relating to CBS or any of its subsidiaries, to CBS
Corporation, 51 W. 52/nd/ Street, New York, New York 10019, . phone number:
(212) 975-4321. In order to ensure timely delivery of requested documents,
requests should be made by November . , 1999.

         The following documents, which have been filed with the SEC by Viacom
(File No. 1-9553) and CBS (File No. 1-977), are incorporated into this document
by reference:

Viacom

                  (a) the Annual Report on Form 10-K of Viacom for the fiscal
         year ended December 31, 1998;

                  (b) the Viacom Quarterly reports on Form 10-Q for the periods
         ended March 31, 1999 and June 30, 1999; and

                  (c) the Current Reports on Form 8-K of Viacom filed May 18,
         1999, June 24, 1999 and September 8, 1999, as amended.

CBS

                  (a) the Annual Report on Form 10-K, as amended by Form 10-K/A,
         of CBS for the fiscal year ended December 31, 1998;

                  (b) the CBS Quarterly report on Form 10-Q, as amended by Form
         10-Q/A, for the period ended March 31, 1999 and the CBS Quarterly
         report on Form 10-Q for the period ended June 30, 1999;

                  (c) the Current Reports on Form 8-K of CBS filed January 29,
         1999, February 5, 1999, April 1, 1999, April 13, 1999, April 30, 1999,
         June 4, 1999, June 28, 1999, July 30, 1999, August 4, 1999, September
         8, 1999 and September 15, 1999;

                  (d) the Current Report on Form 8-K of CBS filed on or about
         October 8, 1999 which includes certain historical financial statements
         of King World;

                  (e) the description of CBS common stock contained in CBS'
         registration statement on Form 10 dated May 15, 1935; and

                  (f) the definitive Proxy Statement filed on March 25, 1999, in
         connection with CBS' 1999 Annual Meeting.

         All references within this document to:

                  (a) the Form 10-K of CBS for the fiscal year ended December
         31, 1998, refer to that Form 10-K as amended by the Form 10-K/A; and

                                      117
<PAGE>

                  (b) the Form 10-Q for the period ended March 31, 1999, refer
         to that Form 10-Q as amended by the Form 10-Q/A.

         All documents filed by Viacom and CBS according to Section 13(a),
13(c), 14 or 15(d) of the Exchange Act, after the date of this joint proxy
statement/prospectus and prior to the date of the special shareholders' meetings
are incorporated by reference into this joint proxy statement/prospectus and are
considered a part of this joint proxy statement/prospectus from the date of
filing of those documents.

         Any statement contained within this joint proxy statement/prospectus or
in any document incorporated by reference will be deemed to be modified or
superseded for purposes of this joint proxy statement/prospectus to the extent
that the statement contained in this joint proxy statement/prospectus or in any
subsequently filed document that also is or is deemed to be incorporated by
reference in this joint proxy statement/prospectus modifies or supersedes that
statement. Statements so modified or superseded will not be deemed, except as so
modified or superseded, to constitute a part of this joint proxy
statement/prospectus.

         No person has been authorized to give any information or to make any
representation other than as contained in this joint proxy statement/prospectus
in connection with the Viacom Class B common stock to be issued in connection
with the merger and, if given or made, the information or representation must
not be relied upon as having been authorized. This joint proxy
statement/prospectus does not constitute an offer to sell or a solicitation of
an offer to purchase securities in any jurisdiction in which, or to any person
to whom, it would be unlawful to make such an offer or solicitation. Neither the
delivery of this joint proxy statement/prospectus nor any distribution of the
securities offered hereunder shall, under any circumstances, create any
implication that there has been no change in the affairs of Viacom or CBS since
the date of this joint proxy statement/prospectus or that the information
contained in this joint proxy statement/prospectus is correct as of any time
subsequent to that date. All information in this joint proxy
statement/prospectus regarding Viacom has been provided by Viacom, and all
information regarding CBS has been provided by CBS.

                                      118
<PAGE>

                                                                         ANNEX A

================================================================================





                          AGREEMENT AND PLAN OF MERGER


                                     Between


                                   VIACOM INC.

                                       and

                                 CBS CORPORATION



                          Dated as of September 6, 1999




================================================================================
<PAGE>

                                TABLE OF CONTENTS


Section                                                                   Page
- -------                                                                   ----

                                    ARTICLE I

                                   THE MERGER

1.01.  The Merger............................................................2
1.02.  Effective Time; Closing...............................................2
1.03.  Effect of the Merger..................................................2
1.04.  Certificate of Incorporation and By-Laws..............................2

                                   ARTICLE II

               CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES

2.01.  Conversion of Securities..............................................3
2.02.  Exchange of Certificates..............................................4
2.03.  Stock Transfer Books..................................................6
2.04.  Stock Options and Other Stock Plans...................................7

                                   ARTICLE III

                      REPRESENTATIONS AND WARRANTIES OF CBS

3.01.  Organization and Qualification; Subsidiaries..........................8
3.02.  Certificate of Incorporation and By-Laws..............................8
3.03.  Capitalization........................................................9
3.04.  Authority Relative to Agreement.......................................9
3.05.  No Conflict; Required Filings and Consents...........................10
3.06.  Permits and Licenses; Contracts......................................11
3.07.  SEC Filings; Financial Statements....................................12
3.08.  Absence of Certain Changes or Events.................................13
3.09.  Absence of Litigation................................................13
3.10.  Employee Benefit Plans...............................................13
3.11.  Labor Matters........................................................15
3.12.  Environmental Matters................................................15
3.13.  Trademarks, Patents and Copyrights...................................16
3.14.  Taxes................................................................17
3.15.  Tax Matters..........................................................17
3.16.  Year 2000 Compliance.................................................17
3.17.  Opinion of Financial Advisors........................................18
<PAGE>

                                       ii
Section                                                                   Page
- -------                                                                   ----

3.18.  Vote Required........................................................18
3.19.  Brokers..............................................................18
3.20.  Pennsylvania Law.....................................................18
3.21.  Rights Agreement.....................................................19

                                   ARTICLE IV

                    REPRESENTATIONS AND WARRANTIES OF VIACOM

4.01.  Organization and Qualification; Subsidiaries.........................19
4.02.  Certificate of Incorporation and By-Laws.............................20
4.03.  Capitalization.......................................................20
4.04.  Authority Relative to Agreement......................................21
4.05.  No Conflict; Required Filings and Consents...........................21
4.06.  Permits and Licenses; Contracts......................................22
4.07.  SEC Filings; Financial Statements....................................23
4.08.  Absence of Certain Changes or Events.................................24
4.09.  Absence of Litigation................................................24
4.10.  Employee Benefit Plans...............................................24
4.11.  Labor Matters........................................................26
4.12.  Environmental Matters................................................26
4.13.  Trademarks, Patents and Copyrights...................................27
4.14.  Taxes................................................................27
4.15.  Tax Matters..........................................................28
4.16.  Year 2000 Compliance.................................................28
4.17.  Opinion of Financial Advisors........................................28
4.18.  Vote Required........................................................29
4.19.  Section 203 of Delaware Law..........................................29
4.20.  Brokers..............................................................29

                                    ARTICLE V

                     CONDUCT OF BUSINESS PENDING THE MERGER

5.01.  Conduct of Business by CBS Pending the Merger........................29
5.02.  Conduct of Business by Viacom Pending the Merger.....................32
5.03.  Other Actions........................................................35
<PAGE>

                                       iii
Section                                                                   Page
- -------                                                                   ----

                                   ARTICLE VI

                              ADDITIONAL AGREEMENTS

6.01.  Registration Statement; Joint Proxy Statement........................35
6.02.  Stockholders' Meetings...............................................38
6.03.  Appropriate Action; Consents; Filings................................38
6.04.  Access to Information; Confidentiality...............................39
6.05.  No Solicitation of Competing Transactions............................40
6.06.  Directors' and Officers' Indemnification and Insurance...............41
6.07.  Notification of Certain Matters......................................42
6.08.  Tax Treatment........................................................42
6.09.  Stock Exchange Listing...............................................42
6.10.  Public Announcements.................................................43
6.11.  Viacom's Directors...................................................43
6.12.  Rights Agreement.....................................................43
6.13.  Assumption of Debt and Leases........................................43
6.14.  Affiliates of CBS....................................................44
6.15.  Prior Service........................................................44
6.16.  Employee Matters.....................................................44

                                   ARTICLE VII

                            CONDITIONS TO THE MERGER

7.01.  Conditions to the Obligations of Each Party..........................45
7.02.  Conditions to the Obligations of Viacom..............................46
7.03.  Conditions to the Obligations of CBS.................................46

                                  ARTICLE VIII

                        TERMINATION, AMENDMENT AND WAIVER

8.01.  Termination..........................................................47
8.02.  Effect of Termination................................................48
8.03.  Amendment............................................................48
8.04.  Waiver...............................................................48
8.05.  Expenses.............................................................49
<PAGE>

                                       iv
Section                                                                   Page
- -------                                                                   ----

                                   ARTICLE IX

                               GENERAL PROVISIONS

9.01.  Non-Survival of Representations, Warranties and Agreements...........50
9.02.  Notices..............................................................50
9.03.  Interpretation, Certain Definitions..................................51
9.04.  Severability.........................................................53
9.05.  Entire Agreement; Assignment.........................................53
9.06.  Parties in Interest..................................................53
9.07.  Specific Performance.................................................53
9.08.  Governing Law........................................................54
9.09.  Consent to Jurisdiction..............................................54
9.10.  Counterparts.........................................................54
9.11.  WAIVER OF JURY TRIAL.................................................54


EXHIBITS

Exhibit A-1                Restated Certificate of Incorporation
Exhibit A-2                By-laws
Exhibit 6.14.              Form of CBS Affiliate Letter
<PAGE>

                             Index of Defined Terms

Defined Term                                             Location of Definition
- ------------                                             ----------------------

affiliate.......................................................Section 9.03(a)
Agreement.......................................................Recitals
Articles of Merger..............................................Section 1.02
Blockbuster.....................................................Section 4.02
Blockbuster Options.............................................Section 4.03
beneficial owner................................................Section 9.03(b)
Blue Sky Laws...................................................Section 3.05(b)
business day....................................................Section 9.03(c)
CBS.............................................................Recitals
CBS Alternative Transaction Fee.................................Section 8.05(b)
CBS Benefit Plans...............................................Section 3.10(a)
CBS Common Stock................................................Section 2.01(a)
CBS Disclosure Schedule.........................................Article III
CBS FCC Licenses................................................Section 3.06(c)
CBS Financial Advisor...........................................Section 3.17
CBS Indentures..................................................Section 6.13(a)
CBS Licensed Facilities.........................................Section 3.06(c)
CBS Material Adverse Effect.....................................Section 3.01
CBS Options.....................................................Section 2.04(a)
CBS Permits.....................................................Section 3.06(a)
CBS Preferred Stock.............................................Section 3.03
CBS Rights Agreement............................................Section 3.03
CBS SEC Reports.................................................Section 3.07(a)
CBS Stock Option Plans..........................................Section 2.04(a)
CBS Superior Proposal...........................................Section 6.05(c)
CBS Systems.....................................................Section 3.16(b)
CBS Year 2000 Compliant.........................................Section 3.16(b)
CBS Year 2000 Plan..............................................Section 3.16(a)
CERCLA..........................................................Section 3.12(d)
Certificate of Merger...........................................Section 1.02
Certificates....................................................Section 2.02(b)
Closing.........................................................Section 1.02
Closing Date....................................................Section 1.02
Code............................................................Recitals
Communications Act..............................................Section 3.05(b)
Competing Transaction...........................................Section 6.05(b)
Confidentiality Agreement.......................................Section 6.04(c)
Continuing Employees............................................Section 6.15
control.........................................................Section 9.03(d)
controlled by...................................................Section 9.03(d)
<PAGE>

                                       ii



Defined Term                                             Location of Definition
- ------------                                             ----------------------

Delaware Law....................................................Recitals
Effective Time..................................................Section 1.02
Environmental Laws..............................................Section 3.12(d)
Environmental Permits...........................................Section 3.12(d)
ERISA...........................................................Section 3.10(a)
Exchange Act....................................................Section 2.04(c)
Exchange Agent..................................................Section 2.02(a)
Exchange Fund...................................................Section 2.02(a)
Exchange Ratio..................................................Section 2.01(a)
Expenses........................................................Section 8.05(a)
FCC.............................................................Section 3.05(b)
Governmental Authority..........................................Section 9.03(e)
Hazardous Materials.............................................Section 3.12(d)
HSR Act.........................................................Section 3.05(b)
Infinity........................................................Section 3.02
IRS.............................................................Section 3.10(a)
King World......................................................Section 3.03
knowledge.......................................................Section 9.03(f)
Laws............................................................Section 3.05(a)
Merger..........................................................Recitals
NYSE............................................................Section 3.03
Order...........................................................Section 6.03(b)
Parent..........................................................Recitals
Parent Stockholder Agreement....................................Recitals
Parent Voting Agreements........................................Recitals
Pending Transactions............................................Section 5.01
Pennsylvania Law................................................Recitals
person..........................................................Section 9.03(g)
Proxy Statement.................................................Section 6.01(a)
Registration Statement..........................................Section 6.01(a)
Representatives.................................................Section 6.04(a)
Rights..........................................................Section 3.03
SEC.............................................................Article III
Securities Act..................................................Section 3.05(b)
Shares..........................................................Section 2.01(a)
Split-off.......................................................Section 5.02
Stockholders' Meeting...........................................Section 6.02
subsidiaries....................................................Section 9.03(h)
subsidiary......................................................Section 9.03(h)
<PAGE>

                                       iii



Defined Term                                             Location of Definition
- ------------                                             ----------------------

Substituted Option..............................................Section 2.04(a)
Surviving Corporation...........................................Section 1.01
Tax.............................................................Section 3.14(a)
Taxes...........................................................Section 3.14(a)
Terminating CBS Breach..........................................Section 8.01(f)
Terminating Viacom Breach.......................................Section 8.01(e)
under common control with.......................................Section 9.03(d)
Viacom..........................................................Recitals
Viacom Benefit Plans............................................Section 4.10(a)
Viacom Class A Common Stock.....................................Recitals
Viacom Class B Common Stock.....................................Recitals
Viacom Disclosure Schedule......................................Article IV
Viacom Employee Arrangements....................................Section 6.16(a)
Viacom FCC Licenses.............................................Section 4.06(c)
Viacom Financial Advisor........................................Section 4.17
Viacom Licensed Facilities......................................Section 4.06(c)
Viacom Material Adverse Effect..................................Section 4.01
Viacom Options..................................................Section 4.03
Viacom Permits..................................................Section 4.06(a)
Viacom Preferred Stock..........................................Section 4.03
Viacom Proposals................................................Recitals
Viacom SEC Reports..............................................Section 4.07(a)
Viacom Stock Option Plans.......................................Section 4.03
Viacom Systems..................................................Section 4.16(b)
Viacom Year 2000 Compliant......................................Section 4.16(b)
Viacom Year 2000 Plan...........................................Section 4.16(a)
<PAGE>

                  AGREEMENT AND PLAN OF MERGER dated as of September 6, 1999
(this "Agreement") between VIACOM INC., a Delaware corporation ("Viacom"), and
CBS CORPORATION, a Pennsylvania corporation ("CBS").

                  WHEREAS, the Boards of Directors of CBS and Viacom have
determined that it is in the best interests of their respective companies and
stockholders to combine their respective businesses in a "merger of equals"
transaction to be effected as set forth in this Agreement;

                  WHEREAS, the Board of Directors of CBS has (i) determined that
the merger of CBS with and into Viacom on the terms set forth in this Agreement
(the "Merger") pursuant to the General Corporation Law of the State of Delaware
("Delaware Law") and the Business Corporation Law of the Commonwealth of
Pennsylvania ("Pennsylvania Law") is fair to CBS and the holders of Shares (as
defined in Section 2.01) and is in the best interests of CBS and (ii) approved
this Agreement, the Merger and the other transactions contemplated hereby and
has recommended that the shareholders of CBS adopt this Agreement;

                  WHEREAS, the Board of Directors of Viacom has determined that
the Merger is fair to, and in the best interests of, Viacom and its stockholders
and has approved and determined to be advisable this Agreement, the Merger and
the other transactions contemplated hereby and has recommended that the holders
of the Class A Common Stock, par value $.01 per share, of Viacom (the "Viacom
Class A Common Stock") (i) approve the issuance of Class B Common Stock, par
value $.01 per share, of Viacom (the "Viacom Class B Common Stock") in the
Merger and (ii) approve the amendment to the Restated Certificate of
Incorporation as set forth in this Agreement, (iii) approve the Merger and (iv)
adopt this Agreement (together, the "Viacom Proposals");

                  WHEREAS, concurrently with the execution of this Agreement and
as an inducement to CBS to enter into this Agreement, National Amusements, Inc.,
a Maryland corporation and the holder of a majority of the shares of Class A
Common Stock ("Parent"), and CBS have entered into (i) a Stockholder Agreement
(the "Parent Stockholder Agreement") pursuant to which Parent has agreed, among
other things, to cause the election of eight members of the Board of Directors
of Viacom designated by CBS for a period of three years following the Merger and
(ii) a Voting Agreement (together with the Parent Stockholder Agreement, the
"Parent Voting Agreements") pursuant to which Parent has agreed, among other
things, to vote its shares of Viacom Class A Common Stock in favor of adoption
of this Agreement and the other transactions contemplated by this Agreement and
to take certain other actions in support of the Merger;

                  WHEREAS, for Federal income tax purposes, it is intended that
the Merger shall qualify as a reorganization under the provisions of Section
368(a) of the United States Internal Revenue Code of 1986, as amended (the
"Code");
<PAGE>

                                        2

                  WHEREAS, as an inducement to Viacom to enter into this
Agreement, concurrently with the execution and delivery of this Agreement, Mel
Karmazin is entering into an employment agreement with Viacom, to be effective
at the Effective Time (as defined below);

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual covenants and agreements herein contained and intending to be legally
bound hereby, Viacom and CBS hereby agree as follows:


                                    ARTICLE I

                                   THE MERGER

                  SECTION 1.01. The Merger. Upon the terms and subject to the
conditions set forth in Article VII, and in accordance with Section 252 of
Delaware Law and Section 1921 of Pennsylvania Law, at the Effective Time CBS
shall be merged with and into Viacom. As a result of the Merger, the separate
corporate existence of CBS shall cease and Viacom shall be the surviving
corporation of the Merger (the "Surviving Corporation").

                  SECTION 1.02. Effective Time; Closing. The closing of the
Merger (the "Closing") shall take place on the first business day after the
satisfaction or, if permissible, waiver of the conditions set forth in Article
VII (such date, the "Closing Date"). On the Closing Date, the parties hereto
shall cause the Merger to be consummated by filing (a) a certificate of merger
(the "Certificate of Merger") with the Secretary of State of the State of
Delaware, in such form as is required by, and executed and acknowledged in
accordance with, Section 252 of Delaware Law and (b) articles of merger (the
"Articles of Merger") with the Department of State of the Commonwealth of
Pennsylvania, in such form as is required by, and executed in accordance with,
Section 1927 of Pennsylvania Law. The term "Effective Time" means the date and
time of the filing of the Certificate of Merger with the Secretary of State of
the State of Delaware (or such later time as may be agreed by the parties hereto
and specified in the Certificate of Merger). The Closing will be held at the
offices of Shearman & Sterling, 599 Lexington Avenue, New York, New York 10022
(or such other place as the parties may agree).

                  SECTION 1.03. Effect of the Merger. At the Effective Time, the
effect of the Merger shall be as provided in the applicable provisions of
Delaware Law and Pennsylvania Law. Without limiting the generality of the
foregoing, at the Effective Time all the property, rights, privileges, powers
and franchises of CBS shall vest in the Surviving Corporation and all debts,
liabilities, obligations, restrictions, disabilities and duties of CBS shall
become the debts, liabilities, obligations, restrictions, disabilities and
duties of the Surviving Corporation.

                  SECTION 1.04. Certificate of Incorporation and By-Laws. (a)
The Restated Certificate of Incorporation of Viacom, as in effect immediately
prior to the Effective Time, shall
<PAGE>

                                        3

be amended as of the Effective Time to be and read in its entirety in the form
set forth as Exhibit A-1 and, as so amended, such Restated Certificate of
Incorporation shall be the certificate of incorporation of the Surviving
Corporation until thereafter changed or amended as provided therein or by
applicable law.

                  (b) The By-laws of Viacom, as in effect immediately prior to
the Effective Time, shall be amended as of the Effective Time so as to read in
their entirety in the form set forth as Exhibit A-2 and, as so amended, such
By-laws shall be the by-laws of the Surviving Corporation until thereafter
changed or amended as provided therein or by applicable law.


                                   ARTICLE II

               CONVERSION OF SECURITIES; EXCHANGE OF CERTIFICATES

                  SECTION 2.01. Conversion of Securities. At the Effective Time,
by virtue of the Merger and without any action on the part of Viacom, CBS or the
holders of any of the following securities:

                  (a) Each share of common stock, par value $1.00 per share, of
         CBS ("CBS Common Stock"; all issued and outstanding shares of CBS
         Common Stock being hereinafter collectively referred to as the
         "Shares") issued and outstanding immediately prior to the Effective
         Time (other than any Shares to be cancelled or converted pursuant to
         Section 2.01(b)) shall be converted, subject to Section 2.02(e), into
         the right to receive 1.085 shares (the "Exchange Ratio") of Viacom
         Class B Common Stock.

                  (b) Each Share held in the treasury of CBS and each Share
         owned by Viacom immediately prior to the Effective Time shall be
         cancelled and extinguished without any conversion thereof and no
         payment shall be made with respect thereto, and each Share owned by any
         direct or indirect wholly owned subsidiary of Viacom or CBS (other than
         Shares held by benefit plans or trusts (including Rabbi trusts))
         immediately prior to the Effective Time shall be converted into the
         right to receive a number of shares of Viacom Class B Common Stock
         equal to the Exchange Ratio.

                  (c) If, prior to the Effective Time (and as permitted by
         Sections 5.01 and/or 5.02), the outstanding Shares or shares of Viacom
         Class B Common Stock shall have been increased, decreased, changed into
         or exchanged for a different number or class of shares or securities as
         a result of a reorganization, recapitalization, reclassification, stock
         dividend, stock split, reverse stock split, combination or exchange of
         shares or other similar change in capitalization, then an appropriate
         and proportionate adjustment shall be made to the Exchange Ratio.
<PAGE>

                                        4

                  SECTION 2.02. Exchange of Certificates. (a) Exchange Agent.
Viacom shall deposit, or shall cause to be deposited, with such bank or trust
company designated by Viacom and reasonably acceptable to CBS (the "Exchange
Agent"), for the benefit of the holders of Shares, for exchange in accordance
with this Article II through the Exchange Agent, certificates representing the
shares of Viacom Class B Common Stock (such certificates for shares of Viacom
Class B Common Stock, together with any dividends or distributions with respect
thereto and any cash in lieu of fractional shares of Viacom Class B Common Stock
payable pursuant to Section 2.02(e), being hereinafter referred to as the
"Exchange Fund") issuable pursuant to Section 2.01 in exchange for outstanding
Shares. The Exchange Agent shall, pursuant to irrevocable instructions, deliver
the Viacom Class B Common Stock contemplated to be issued pursuant to Section
2.01 out of the Exchange Fund. Except as contemplated by Section 2.02(f) hereof,
the Exchange Fund shall not be used for any other purpose.

                  (b) Exchange Procedures. As promptly as practicable after the
Effective Time, Viacom shall cause the Exchange Agent to mail to each holder of
a certificate or certificates which immediately prior to the Effective Time
represented outstanding Shares (the "Certificates") (i) a letter of transmittal
(which shall specify that delivery shall be effected, and risk of loss and title
to the Certificates shall pass, only upon proper delivery of the Certificates to
the Exchange Agent, and shall be in customary form) and (ii) instructions for
use in effecting the surrender of the Certificates in exchange for certificates
representing whole shares of Viacom Class B Common Stock, together with any
dividends or distribution with respect thereto and any cash in lieu of
fractional shares. Upon surrender to the Exchange Agent of a Certificate for
exchange and cancellation, together with such letter of transmittal, duly
executed, and such other documents as may be required pursuant to such
instructions, the holder of such Certificate shall be entitled to receive in
exchange therefor a certificate representing that number of whole shares of
Viacom Class B Common Stock which such holder has the right to receive in
respect of the Shares formerly represented by such Certificate (after taking
into account all Shares then held by such holder), cash in lieu of fractional
shares of Viacom Class B Common Stock to which such holder is entitled pursuant
to Section 2.02(e) and any dividends or other distributions to which such holder
is entitled pursuant to Section 2.02(c), and the Certificate so surrendered
shall forthwith be cancelled. In the event of a transfer of ownership of Shares
that is not registered in the transfer records of CBS, a certificate
representing the proper number of shares of Viacom Class B Common Stock may be
issued to a transferee if the Certificate representing such Shares is presented
to the Exchange Agent, accompanied by all documents required to evidence and
effect such transfer and by evidence that any applicable stock transfer taxes
have been paid. Until surrendered as contemplated by this Section 2.02, each
Certificate shall be deemed at any time after the Effective Time to represent
only the right to receive upon such surrender the certificate representing
shares of Viacom Class B Common Stock, cash in lieu of any fractional shares of
Viacom Class B Common Stock to which such holder is entitled pursuant to Section
2.02(e) and any dividends or other distributions to which such holder is
entitled pursuant to Section 2.02(c).
<PAGE>

                                        5

                  (c) Distributions with Respect to Unexchanged Shares of Viacom
Class B Common Stock. No dividends or other distributions with a record date
after the Effective Time shall be paid to the holder of any unsurrendered
Certificate with respect to the shares of Viacom Class B Common Stock
represented thereby, and no cash payment in lieu of fractional shares shall be
paid to any such holder pursuant to Section 2.02(e), until the holder of such
Certificate shall surrender such Certificate. Subject to the effect of escheat,
Tax (as defined in Section 3.14) or other applicable Laws (as defined in Section
3.05), following surrender of any such Certificate, there shall be paid to the
record holder thereof, without interest, (i) promptly, the amount of any cash
payable with respect to a fractional share of Viacom Class B Common Stock to
which such holder is entitled pursuant to Section 2.02(e) and the amount of
dividends or other distributions with a record date after the Effective Time and
theretofore paid with respect to such whole shares of Viacom Class B Common
Stock, and (ii) at the appropriate payment date, the amount of dividends or
other distributions with a record date after the Effective Time and a payment
date occurring after surrender, payable with respect to such whole shares of
Viacom Class B Common Stock.

                  (d) No Further Rights in CBS Common Stock. All shares of
Viacom Class B Common Stock issued upon conversion of the Shares in accordance
with the terms hereof (including any cash paid pursuant to Sections 2.02(c) or
(e)) shall be deemed to have been issued in full satisfaction of all rights
pertaining to such Shares.

                  (e) No Fractional Shares. No certificates or scrip
representing fractional shares of Viacom Class B Common Stock shall be issued
upon the surrender for exchange of Certificates, and such fractional share
interests will not entitle the owner thereof to vote or to any other rights of a
stockholder of Viacom. Each holder of a fractional share interest shall be paid
an amount in cash equal to the product obtained by multiplying (i) such
fractional share interest to which such holder (determined after taking into
account all fractional share interests then held by such holder) would otherwise
be entitled by (ii) the closing price for a share of Viacom Class B Common Stock
on the Consolidated Tape, Network A, as reported in The Wall Street Journal
(Northeast edition) or any other authoritative source on the first trading day
immediately following the Effective Time. From time to time after the Effective
Time, as promptly as practicable after the determination of the amount of cash,
if any, to be paid to any holders of fractional share interests who have
surrendered their Certificates to the Exchange Agent, the Exchange Agent shall
so notify Viacom, and Viacom shall deposit such amount with the Exchange Agent
and shall cause the Exchange Agent to forward payments to such holder of
fractional share interests subject to and in accordance with the terms of
Sections 2.02(b) and (c).

                  (f) Termination of Exchange Fund. Any portion of the Exchange
Fund which remains undistributed to the holders of CBS Common Stock for six (6)
months after the Effective Time shall be delivered to Viacom, upon demand, and
any holders of CBS Common Stock who have not theretofore complied with this
Article II shall thereafter look only to Viacom for the shares of Viacom Class B
Common Stock, any cash in lieu of fractional shares of Viacom Class
<PAGE>

                                        6

B Common Stock to which they are entitled pursuant to Section 2.02(e) and any
dividends or other distributions with respect to Viacom Class B Common Stock to
which they are entitled pursuant to Section 2.02(c). Any portion of the Exchange
Fund remaining unclaimed by holders of Shares as of a date which is immediately
prior to such time as such amounts would otherwise escheat to or become property
of any government entity shall, to the extent permitted by applicable Law,
become the property of Viacom free and clear of any claims or interest of any
person previously entitled thereto.

                  (g) No Liability. Neither Viacom nor CBS shall be liable to
any holder of Shares for any such Shares (or dividends or distributions with
respect hereto) or cash delivered to a public official pursuant to any abandoned
property, escheat or similar Law.

                  (h) Lost, Stolen or Destroyed Certificates. In the event that
any Certificate has been lost, stolen or destroyed, upon the making of an
affidavit of that fact by the person claiming such Certificate to be lost,
stolen or destroyed and, if required by Viacom, the posting by such person of a
bond in such reasonable amount as Viacom may direct as indemnity against any
claim that may be made against it with respect to such Certificate, Viacom will,
in exchange for such lost, stolen or destroyed Certificate, issue or cause to be
issued the number of whole shares of Viacom Common Stock and pay or cause to be
paid the amounts deliverable in respect thereof pursuant to Section 2.02(e) and
2.02(c).

                  (i) Withholding Rights. Viacom shall be entitled to deduct and
withhold from the consideration otherwise payable pursuant to this Agreement to
any holder of Shares such amounts as it is required to deduct and withhold with
respect to the making of such payment under the Code, or any provision of state,
local or foreign Tax Law. To the extent that amounts are so withheld by Viacom,
such withheld amounts shall be treated for all purposes of this Agreement as
having been paid to the holder of the Shares in respect of which such deduction
and withholding was made by Viacom.

                  SECTION 2.03. Stock Transfer Books. At the Effective Time, the
stock transfer books of CBS shall be closed and there shall be no further
registration of transfers of Shares thereafter on the records of CBS. From and
after the Effective Time, the holders of Certificates shall cease to have any
rights with respect to such Shares except as otherwise provided herein or by any
Laws. On or after the Effective Time, any Certificates presented to the Exchange
Agent or Viacom for any reason shall be converted into shares of Viacom Class B
Common Stock, any cash in lieu of fractional shares of Viacom Class B Common
Stock to which the holders thereof are entitled pursuant to Section 2.02(e) and
any dividends or other distributions to which the holders thereof are entitled
pursuant to Section 2.02(c).
<PAGE>

                                        7

                  SECTION 2.04. Stock Options and Other Stock Plans. (a) Prior
to the Effective Time, Viacom and CBS shall take such action as may be necessary
to cause each unexpired and unexercised option or warrant to purchase Shares
which are outstanding immediately prior to the Effective Time (collectively,
"CBS Options"), whether granted under CBS's stock option plans set forth in
Section 2.04 of the CBS Disclosure Schedule (as defined below) or otherwise, to
be automatically converted at the Effective Time into an option or warrant
(collectively, a "Substituted Option") to purchase a number of shares of Viacom
Class B Common Stock equal to the number of Shares that could have been
purchased (assuming full vesting) under such CBS Option multiplied by the
Exchange Ratio (rounded to the nearest whole number of shares of Viacom Class B
Common Stock) at a price per share of Viacom Class B Common Stock equal to the
per-share option exercise price specified in the CBS Option divided by the
Exchange Ratio (rounded down to the nearest whole cent). Except as otherwise
provided in this Agreement, such Substituted Option shall otherwise be subject
to the same terms and conditions as such CBS Option (except that all vesting
periods with respect thereto shall, to the extent provided by the terms thereof,
accelerate, and be subject to any other rights which arise under the CBS Stock
Option Plans or the option agreements evidencing awards thereunder as a result
of the transactions contemplated by this Agreement). The date of grant of the
Substituted Option shall be the date on which the corresponding CBS Option was
granted. At the Effective Time, (i) all references in the related stock option
agreements to CBS shall be deemed to refer to Viacom and (ii) Viacom shall
assume all of CBS's obligations with respect to CBS Options as so amended. As
promptly as reasonably practicable after the Effective Time, Viacom shall issue
to each holder of an outstanding CBS Option a document evidencing the foregoing
assumption by Viacom. Employee and director deferrals and director common stock
equivalents and all other equity based compensation that references CBS Common
Stock will as of and after the Effective Time, be deemed to refer to Viacom
Class B Common Stock (as adjusted to reflect the Exchange Ratio).

                  (b) In respect of each CBS Option assumed by Viacom, and the
shares of Viacom Class B Common Stock underlying such CBS Option, Viacom shall,
no later than one Business Day after the Effective Time, file and keep current a
Form S-8 or other appropriate registration statement for as long as any
Substituted Options remain outstanding.

                  (c) Prior to the Effective Time, Viacom and CBS shall take all
steps reasonably necessary to cause the transactions contemplated hereby and any
other dispositions of equity securities of CBS (including derivative securities)
or acquisitions of Viacom equity securities (including derivative securities) in
connection with this Agreement by each individual who (a) is a director or
officer of Viacom or (b) at the Effective Time, will become a director or
officer of Viacom, to be exempt under Rule 16b-3 promulgated under the
Securities Exchange Act of 1934, as amended (the "Exchange Act").
<PAGE>

                                        8

                                   ARTICLE III

                      REPRESENTATIONS AND WARRANTIES OF CBS

                  Except as disclosed in the report on Form 10-K dated March 24,
1999 for the year ended December 31, 1998, the Reports on Form 10-K/A, Form
10-Q, Form 10-Q/A and Form 8-K since December 31, 1998 or the proxy statement
dated March 25, 1999, in each case in the form filed by CBS with the United
States Securities and Exchange Commission (the "SEC") or in a separate
disclosure schedule which has been delivered by CBS to Viacom prior to the
execution of this Agreement (the "CBS Disclosure Schedule") (each section of
which qualifies the correspondingly numbered representation and warranty or
covenant to the extent specified therein and such other representations and
warranties or covenants to the extent a matter in such section is disclosed in
such a way as to make its relevance to the information called for by such other
representation and warranty or covenant readily apparent), CBS hereby represents
and warrants to Viacom:

                  SECTION 3.01. Organization and Qualification; Subsidiaries.
Each of CBS and its subsidiaries is a corporation or entity duly incorporated or
formed, validly existing and in good standing under the laws of its jurisdiction
of incorporation or formation and has the requisite corporate power and
authority and all necessary governmental approvals to own, lease and operate its
properties and to carry on its business as it is now being conducted, except
where the failure to have such power, authority and governmental approvals would
not have a CBS Material Adverse Effect (as defined below). Each of CBS and its
subsidiaries is duly qualified or licensed as a foreign corporation to do
business, and is in good standing, in each jurisdiction where the character of
the properties owned, leased or operated by it or the nature of its business
makes such qualification or licensing necessary, except for such failures to be
so qualified or licensed and in good standing that would not have a CBS Material
Adverse Effect. The term "CBS Material Adverse Effect" means any change, effect
or circumstance that is or is reasonably likely to be materially adverse to the
business, results of operations or financial condition of CBS and its
subsidiaries taken as a whole, other than any change, effect or circumstance
relating to or resulting from (i) general changes in the media or entertainment
industries or the advertising markets, (ii) changes in general economic
conditions or securities markets in general or (iii) this Agreement or the
transactions contemplated hereby or the announcement thereof.

                  SECTION 3.02. Certificate of Incorporation and By-Laws. CBS
has made available to Viacom a complete and correct copy of the Articles of
Incorporation and the Bylaws, each as amended to date, of CBS and Infinity
Broadcasting Corporation, a Delaware corporation ("Infinity"). The Articles of
Incorporation and By-laws (or equivalent organizational documents) of CBS and
its subsidiaries are in full force and effect. Except as would not have a CBS
Material Adverse Effect, none of CBS or its subsidiaries is in violation of any
provision of its Articles of Incorporation or By-laws (or equivalent
organizational documents).
<PAGE>

                                        9

                  SECTION 3.03. Capitalization. The authorized capital stock of
CBS consists of 1,100,000,000 Shares and 25,000,000 shares of preferred stock,
par value $1.00 per share (the "CBS Preferred Stock"). As of August 31, 1999,
(a) 705,119,425 Shares were issued and outstanding, all of which were validly
issued, fully paid and nonassessable, (b) 40,099,599 Shares were held in the
treasury of CBS, (c) 51,007,538 Shares were reserved for future issuance
pursuant to outstanding unexercised employee stock options granted pursuant to
the CBS stock option plans or otherwise and (d) 70,365,195 Shares were reserved
for future issuance in connection with the merger of a wholly owned subsidiary
of CBS with and into King World Productions, Inc. ("King World") and 9,910,600
(or some equivalent amount of CBS Preferred Stock, if appropriate), measured at
the September 3, 1999 New York Stock Exchange (the "NYSE") Closing Price, were
reserved for future issuance in connection with the acquisition from Gaylord
Entertainment Company of television station KVTV, Dallas/Fort Worth, Texas. As
of the date of this Agreement, no shares of CBS Preferred Stock are outstanding.
As of the date of this Agreement, except for the issuance of Shares pursuant to
the exercise of CBS Options and options to purchase 5,850,555 shares of Class A
Common Stock, par value $0.01 per share, of Infinity, outstanding prior to
August 31, 1999, no shares of capital stock of CBS or any of its subsidiaries
have been issued since August 31, 1999. Except as set forth in this Section
3.03, and except for the Series A participating preferred stock purchase rights
of CBS (the "Rights") issued pursuant to the Rights Agreement, dated as of
December 28, 1995, between CBS and First Chicago Trust Company of New York (the
"CBS Rights Agreement"), as of the date of this Agreement there are no options,
warrants or other rights, agreements (including registration rights agreements),
arrangements or commitments of any character relating to the issued or unissued
capital stock of CBS or any of its subsidiaries or obligating CBS or any of its
subsidiaries to issue or sell any shares of capital stock of, or other equity
interests in, CBS or any of its subsidiaries. All shares of capital stock of CBS
and its subsidiaries subject to issuance as aforesaid, upon issuance on the
terms and conditions specified in the instruments pursuant to which they are
issuable, will be duly authorized, validly issued, fully paid and nonassessable.
As of the date of this Agreement, there are no outstanding contractual material
obligations of CBS or any subsidiary to repurchase, redeem or otherwise acquire
any shares of capital stock of CBS or any of its subsidiaries or to provide
material funds to, or make any material investment (in the form of a loan
capital contribution or otherwise) in, any person.

                  SECTION 3.04. Authority Relative to Agreement. CBS has all
necessary power and authority to execute and deliver this Agreement, to perform
its obligations hereunder and to consummate the Merger and the other
transactions contemplated hereby. The execution and delivery of this Agreement
by CBS and the consummation by CBS of the Merger and the other transactions
contemplated hereby have been duly and validly authorized by all necessary
corporate action and no other corporate proceedings on the part of CBS are
necessary to authorize the execution and delivery of this Agreement or to
consummate the Merger and the other transactions contemplated hereby (other
than, with respect to the Merger, the adoption of this Agreement by the
affirmative vote of a majority of the votes cast by all shareholders entitled to
vote at the CBS Stockholders' Meeting (as defined in Section 6.02) and the
filing and
<PAGE>

                                       10

recordation of appropriate merger documents as required by Pennsylvania Law).
This Agreement has been duly and validly executed and delivered by CBS and,
assuming the due authorization, execution and delivery by Viacom, this Agreement
constitutes a legal, valid and binding obligation of CBS, enforceable against
CBS in accordance with its terms.

                  SECTION 3.05. No Conflict; Required Filings and Consents. (a)
The execution and delivery of this Agreement by CBS does not, and the
performance of this Agreement by CBS will not, (i) conflict with or violate the
Articles of Incorporation or By-laws of (A) CBS or Infinity or (B) any of its
other subsidiaries, (ii) assuming the consents, approvals, authorizations and
waivers specified in Section 3.05(b) have been received and the waiting periods
referred to therein have expired, and any condition precedent to such consent,
approval, authorization, or waiver has been satisfied, conflict with or violate
any domestic (federal, state or local) or foreign law, rule, regulation, order,
judgment or decree (collectively, "Laws") applicable to CBS or any of its
subsidiaries or by which any property or asset of CBS or any of its subsidiaries
is bound or affected or (iii) result in any breach of or constitute a default
(or an event which with notice or lapse of time or both would become a default)
under, or give to others any right of termination, amendment, acceleration, or
cancellation of, or result in the creation of a lien or other encumbrance on any
property or asset of CBS or any of its subsidiaries pursuant to, any note, bond,
mortgage, indenture or credit agreement, or, to CBS's knowledge as of the date
of this Agreement, any other contract, agreement, lease, license, permit,
franchise or other instrument or obligation to which CBS or any of its
subsidiaries is a party or by which CBS or any of its subsidiaries or any
property or asset of CBS or any of its subsidiaries is bound or affected,
except, in the case of clauses (i)(B), (ii) and (iii), for any such conflicts,
violations, breaches, defaults or other occurrences of the type referred to
above which would not have a CBS Material Adverse Effect or would not prevent or
materially delay the consummation of the Merger; provided, however, that for
purposes of this Section 3.05(a), the definition of CBS Material Adverse Effect
shall be read so as not to include clause (iii) of the definition thereof.

                  (b) The execution and delivery of this Agreement by CBS do
not, and the performance of this Agreement by CBS will not, require any consent,
approval, authorization, waiver or permit of, or filing with or notification to,
any governmental or regulatory authority, domestic, foreign or supranational,
except for applicable requirements of the Exchange Act, the Securities Act of
1933, as amended (the "Securities Act"), state securities or "blue sky" laws
("Blue Sky Laws"), the pre-merger notification arrangements of the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the rules
and regulations thereunder (the "HSR Act"), such filings, approvals and waivers
of the Federal Communications Commission or any successor entity (the "FCC") as
may be required under the Communications Act of 1934, as amended, and the rules,
regulations and of the FCC thereunder (collectively, the "Communications Act"),
applicable requirements of the Investment Canada Act of 1985 and the Competition
Act (Canada), any other non-United States competition, antitrust and investment
law, filing and recordation of appropriate merger documents as required by
Delaware Law and Pennsylvania Law and the rules of the NYSE and except where
failure to obtain such consents,
<PAGE>

                                       11

approvals, authorizations or permits, or to make such filings or notifications,
would not have a CBS Material Adverse Effect or would not prevent or materially
delay the consummation of the Merger; provided, however, that for purposes of
this Section 3.05(b), the definition of CBS Material Adverse Effect shall be
read so as not to include clause (iii) of the definition thereof.

                  SECTION 3.06. Permits and Licenses; Contracts. (a) Each of CBS
and its subsidiaries is in possession of all franchises, grants, authorizations,
licenses, permits, easements, variances, exceptions, consents, certificates,
approvals and orders necessary for CBS or any of its subsidiaries to own, lease
and operate the properties of CBS and its subsidiaries or to carry on their
business as it is now being conducted and contemplated to be conducted (the "CBS
Permits"), and no suspension or cancellation of any of the CBS Permits is
pending or, to the knowledge of CBS, threatened, except where the failure to
have, or the suspension or cancellation of, any of the CBS Permits would not
have a CBS Material Adverse Effect. None of CBS or any of its subsidiaries is in
conflict with, or in default or violation of, (i) any Laws applicable to CBS or
any of its subsidiaries or by which any property or asset of CBS or any of its
subsidiaries is bound or affected, (ii) any of the CBS Permits or (iii) any
note, bond, mortgage, indenture, contract, agreement, lease, license, permit,
franchise or other instrument or obligation to which CBS or any of its
subsidiaries is a party or by which CBS or any of its subsidiaries or any
property or asset of CBS or any of its subsidiaries is bound or affected, except
for any such conflicts, defaults or violations that would not have a CBS
Material Adverse Effect.

                  (b) Except as would not have a CBS Material Adverse Effect,
and to the knowledge of CBS, except as would not have a material adverse effect
on the Surviving Corporation following the Effective Time, none of CBS or any of
its subsidiaries is a party to any contracts or agreements that limits the
ability of CBS or any of its subsidiaries or, after the Effective Time, Viacom
or any of its subsidiaries, to compete in any line of business or with any
person or engage in any business in any geographic area, in each case except for
competition in businesses that neither CBS nor Viacom are currently engaged in
or will reasonably foreseeably engage in.

                  (c) CBS and its subsidiaries have operated the radio and
television stations and associated facilities for which CBS or any of its
subsidiaries holds licenses from the FCC, in each case which are owned or
operated by CBS and its subsidiaries (the "CBS Licensed Facilities"), in
material compliance with the terms of the CBS Permits issued by the FCC to CBS
and its subsidiaries ("CBS FCC Licenses"), and in material compliance with the
Communications Act, and CBS and its subsidiaries have timely filed or made all
applications, reports and other disclosures required by the FCC to be filed or
made with respect to the CBS Licensed Facilities and have timely paid all FCC
regulatory fees with respect thereto, in each case except as would not have a
CBS Material Adverse Effect. As of the date hereof, to CBS's knowledge, there is
not now pending or threatened before the FCC any material investigation,
proceeding, notice of violation, order of forfeiture or complaint against CBS or
any of its subsidiaries, relating to any
<PAGE>

                                       12

of the CBS Licensed Facilities or FCC regulated services conducted by CBS that,
if adversely decided, would have a CBS Material Adverse Effect.

                  SECTION 3.07. SEC Filings; Financial Statements. (a) CBS and
Infinity have filed all forms, reports and documents required to be filed by it
with the SEC from December 31, 1996 to the date of this Agreement, including:
(i) Annual Reports on Form 10-K, (ii) Quarterly Reports on Form 10-Q and (iii)
proxy statements relating to CBS's and Infinity's meetings of shareholders
(whether annual or special) (the forms, reports and other documents referred to
in clauses (i), (ii), (iii) and all other forms, reports and other registration
statements filed by CBS or Infinity with the SEC as of the date of this
Agreement, including all amendments and supplements thereto filed with the SEC
as of the date of this Agreement, above being referred to herein, collectively,
as the "CBS SEC Reports"). The CBS SEC Reports, as well as all forms, reports
and documents to be filed by CBS or Infinity with the SEC after the date hereof
and prior to the Effective Time, (i) were or will be prepared in accordance with
the requirements of the Securities Act, and the Exchange Act, as the case may
be, and the rules and regulations thereunder, (ii) did not at the time they were
filed, or will not at the time they are filed, contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements made therein, in the light of the
circumstances under which they were made, not misleading, and (iii) did not at
the time they were filed, or will not at the time they are filed, omit any
documents required to be filed as exhibits thereto. No CBS subsidiary, except
Infinity, is subject to the periodic reporting requirements of the Exchange Act.

                  (b) Each of the financial statements (including, in each case,
any notes thereto) contained in the CBS SEC Reports and each of the financial
statements to be filed by CBS or Infinity with the SEC after the date hereof and
prior to the Effective Time was or will be prepared in accordance with United
States generally accepted accounting principles applied on a consistent basis
throughout the periods indicated (except as may be indicated in the notes
thereto) and each fairly presented in all material respects or will fairly
present in all material respects the consolidated financial position, results of
operations and cash flows of CBS and its subsidiaries as at the respective dates
thereof and for the respective periods indicated therein in accordance with
generally accepted accounting principles (subject, in the case of unaudited
statements, to normal and recurring year-end adjustments which were not and are
not expected to be material).

                  (c) Except as and to the extent set forth in the CBS SEC
Reports, CBS and its subsidiaries do not have any liability or obligation of any
nature (whether accrued, absolute, contingent or otherwise) other than
liabilities and obligations which, individually or in the aggregate, would not
have a CBS Material Adverse Effect.

                  (d) CBS has heretofore furnished to Viacom complete and
correct copies of all material amendments and modifications that have not been
filed by CBS or Infinity with the SEC to all agreements, documents and other
instruments that previously had been filed by CBS or Infinity with the SEC and
are currently in effect.
<PAGE>

                                       13

                  SECTION 3.08. Absence of Certain Changes or Events. (a) Since
December 31, 1998, except as disclosed in any CBS SEC Report or as contemplated
by this Agreement, there has not been any change, event or circumstance which,
when taken individually or together with all other changes, events or
circumstances, has had or would have a CBS Material Adverse Effect, and (b)
since December 31, 1998 to the date of this Agreement, except as disclosed in
any CBS SEC Report (i) each of CBS and its subsidiaries has conducted its
businesses only in the ordinary course and in a manner consistent with past
practice and (ii) there has not been (A) any material change by CBS or any of
its subsidiaries in its material accounting policies, practices and procedures,
(B) any entry by CBS or any of its subsidiaries into any commitment or
transaction material to CBS and its subsidiaries taken as a whole other than in
the ordinary course of business consistent with past practice, (C) any
declaration, setting aside or payment of any dividend or distribution in respect
of any capital stock of CBS or any of its subsidiaries (other than cash
dividends payable by any wholly owned subsidiary to another subsidiary or CBS),
or (D) any increase in the compensation payable or to become payable to any
corporate officers or heads of divisions of CBS or any of its subsidiaries,
except in the ordinary course of business consistent with past practice.

                  SECTION 3.09. Absence of Litigation. Except as disclosed in
any CBS SEC Report, there is no claim, action, proceeding or investigation
pending or, to the knowledge of CBS, threatened against CBS or any of its
subsidiaries, or any property or asset of CBS or any of its subsidiaries, before
any court, arbitrator or Governmental Authority, in each case except as would
not have a CBS Material Adverse Effect. As of the date of this Agreement, none
of CBS, any of its subsidiaries nor any property or asset of CBS or any of its
subsidiaries is subject to any order, writ, judgment, injunction, decree,
determination or award imposed by any court, arbitration or Governmental
Authority, in each case except as would not have a CBS Material Adverse Effect.

                  SECTION 3.10. Employee Benefit Plans. (a) With respect to each
employee benefit plan, program, arrangement and contract (including, without
limitation, any "employee benefit plan", as defined in Section 3(3) of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA")),
maintained or contributed to by CBS or any of its subsidiaries, or with respect
to which CBS or any of its subsidiaries could incur liability under Section 4069
of ERISA, other than multiemployer plans within the meaning of Section 3(37) of
ERISA (the "CBS Benefit Plans"), CBS will provide to Viacom within 15 days of
the date of this Agreement a true and correct copy of (i) the most recent annual
report (Form 5500) filed with the Internal Revenue Service (the "IRS"), (ii)
such CBS Benefit Plan, (iii) each trust agreement relating to such CBS Benefit
Plan, (iv) the most recent summary plan description for each CBS Benefit Plan
for which a summary plan description is required, (v) the most recent actuarial
report or valuation relating to a CBS Benefit Plan subject to Title IV of ERISA,
if any, and (vi) the most recent determination letter, if any, issued by the IRS
with respect to any CBS Benefit Plan qualified under Section 401(a) of the Code.
CBS will, promptly following the date of this Agreement, request a copy of each
CBS Benefit Plan that is a multiemployer plan within the meaning of
<PAGE>

                                       14

Section 3(37) of ERISA from the trustees of such multiemployer plan and CBS
shall deliver such copy of the plan to Viacom promptly upon its receipt thereof.

                  (b) Each CBS Benefit Plan has been administered in accordance
with its terms, and in compliance with applicable laws, except as would not have
a CBS Material Adverse Effect. CBS and its subsidiaries have performed all
obligations required to be performed by them under, are not in any respect in
default under or in violation of, and have no knowledge of any default or
violation by any party to, any CBS Benefit Plans, except as would not have a CBS
Material Adverse Effect. With respect to the CBS Benefit Plans, no event has
occurred and, to the knowledge of CBS, there exists no condition or set of
circumstances, in connection with which CBS or any of its subsidiaries is
reasonably likely to be subject to any liability under the terms of such CBS
Benefit Plans, ERISA, the Code or any other applicable Law except as would not,
individually or in the aggregate, have a CBS Material Adverse Effect. Neither
CBS nor any of its subsidiaries has any actual or contingent liability under
Title IV of ERISA (other than the payment of premiums to the Pension Benefit
Guaranty Corporation), including, without limitation, any liability in
connection with (i) the termination or reorganization of any employee benefit
plan subject to Title IV of ERISA or (ii) the withdrawal from any Multiemployer
Plan or Multiple Employer Plan, and no fact or event exists which is reasonably
likely to give rise to any such liability, in each case except as would not,
individually or in the aggregate, have a CBS Material Adverse Effect.

                  (c) CBS has made available to Viacom: (i) copies of all
employment agreements with the top five most highly compensated executive
officers of CBS and its subsidiaries; (ii) copies of all material severance
agreements, programs and policies of CBS or any of its subsidiaries with or
relating to its or its subsidiaries' employees; and (iii) copies of all material
plans, programs, agreements and other arrangements of CBS or any of its
subsidiaries with or relating to its or its subsidiaries' employees which
contain change in control provisions. Neither the execution and delivery of this
Agreement nor the consummation of the transactions contemplated hereby will (i)
result in any payment (including, without limitation, severance, unemployment
compensation, "golden parachute" or otherwise) becoming due to any director,
officer or employee of CBS or any of its subsidiaries from CBS or any of its
affiliates under any CBS Benefit Plan or otherwise, which payment is material in
relation to the compensation previously provided to such individual (other than
payments resulting from a change in responsibilities or reporting obligations of
individual employees), (ii) materially increase any benefits otherwise payable
under any CBS Benefit Plan, which increase is material in relation to the
benefits previously provided or (iii) result in any acceleration of the time of
payment or vesting of any material benefits.

                  (d) Each CBS Benefit Plan that is intended to be qualified
under Section 401(a) of the Code or Section 401(k) of the Code has timely
received a favorable determination letter from the IRS covering all of the
provisions applicable to the Plan for which determination letters are currently
available that the CBS Benefit Plan is so qualified and each trust established
<PAGE>

                                       15

in connection with any CBS Benefit Plan which is intended to be exempt from
federal income taxation under Section 501(a) of the Code has received a
determination letter from the IRS that it is so exempt, and no fact or event has
occurred since the date of such determination letter or letters from the IRS
which is reasonably likely to adversely affect the qualified status of any such
CBS Benefit Plan or the exempt status of any such trust.

                  SECTION 3.11. Labor Matters. There is no labor dispute, strike
or work stoppage against CBS or any of its subsidiaries pending or, to the
knowledge of CBS, threatened which would reasonably be expected to interfere
with the respective business activities of CBS or any of its subsidiaries,
except for such disputes, strikes or work stoppages which would not have a CBS
Material Adverse Effect. There is no charge or complaint against CBS or any of
its subsidiaries by the National Labor Relations Board or any comparable state
agency pending or threatened in writing, except for such charges or complaints
(or related unfair labor practices) which would not have a CBS Material Adverse
Effect.

                  SECTION 3.12. Environmental Matters. Except as would not,
individually or in the aggregate, have a CBS Material Adverse Effect:

                  (a) CBS and its subsidiaries (i) are in compliance with all,
         and are not subject to any asserted liability or, to CBS's knowledge,
         any liability (including liability with respect to current or former
         subsidiaries or operations), in each case with respect to any,
         Environmental Laws (as defined below), (ii) hold or have applied for
         all Environmental Permits (as defined below) and (iii) are in
         compliance with their respective Environmental Permits;

                  (b) neither CBS nor any CBS subsidiary has received any
         written notice, demand, letter, claim or request for information
         alleging that CBS or any of its subsidiaries is or may be in violation
         of, or liable under, any Environmental Law;

                  (c) neither CBS nor any of its subsidiaries (i) has entered
         into or agreed to any consent decree or order or is subject to any
         judgment, decree or judicial order relating to compliance with
         Environmental Laws, Environmental Permits or the investigation,
         sampling, monitoring, treatment, remediation, removal or cleanup of
         Hazardous Materials (as defined below) and, to the knowledge of CBS, no
         investigation, litigation or other proceeding is pending or threatened
         in writing with respect thereto, or (ii) is an indemnitor in connection
         with any threatened or asserted claim by any third-party indemnitee for
         any liability under any Environmental Law or relating to any Hazardous
         Materials; and

                  (d) none of the real property owned or leased by CBS or any of
         its subsidiaries is listed or, to the knowledge of CBS, proposed for
         listing on the "National Priorities List"
<PAGE>

                                       16

         under CERCLA, as updated through the date hereof, or any similar state
         or foreign list of sites requiring investigation or cleanup. For
         purposes of this Agreement:

                  "CERCLA" means the Comprehensive Environmental Response,
         Compensation and Liability Act of 1980, as amended as of the date
         hereof.

                  "Environmental Laws" means any applicable federal, state,
         local or foreign statute, law, ordinance, regulation, rule, code,
         treaty, writ or order and any enforceable judicial or administrative
         interpretation thereof, including any judicial or administrative order,
         consent decree, judgment, stipulation, injunction, permit,
         authorization, policy, opinion, or agency requirement, in each case
         having the force and effect of law, relating to the pollution,
         protection, investigation or restoration of the environment, health and
         safety or natural resources, including those relating to the use,
         handling, presence, transportation, treatment, storage, disposal,
         release, threatened release or discharge of Hazardous Materials or
         noise, odor, wetlands, pollution, contamination or any injury or threat
         of injury to persons or property or to the siting, construction,
         operation, closure and post- closure care of waste disposal, handling
         and transfer facilities.

                  "Environmental Permits" means any permit, approval,
         identification number, license and other authorization required under
         any Environmental Law.

                  "Hazardous Materials" means (i) any petroleum, petroleum
         products, by- products or breakdown products, radioactive materials,
         asbestos-containing materials or polychlorinated biphenyls or (ii) any
         chemical, material or other substance defined or regulated as toxic or
         hazardous or as a pollutant or contaminant or waste under any
         Environmental Law.

                  SECTION 3.13. Trademarks, Patents and Copyrights. Except as
would not have a CBS Material Adverse Effect, CBS and its subsidiaries own, or
possess adequate licenses or other valid rights to use, all material patents,
patent rights, trademarks, trademark rights, trade names, trade name rights,
copyrights, service marks, service mark rights, trade secrets, applications to
register, and registrations for, the foregoing trademarks, know-how and other
proprietary rights and information used in connection with the business of CBS
and its subsidiaries as currently conducted, and no assertion or claim has been
made in writing challenging the validity of any of the foregoing which would
have a CBS Material Adverse Effect. To the knowledge of CBS, the conduct of the
business of CBS and its subsidiaries as currently conducted does not conflict in
any way with any patent, patent right, license, trademark, trademark right,
trade name, trade name right, service mark or copyright of any third party,
except for such conflicts which would not have a CBS Material Adverse Effect.
<PAGE>

                                       17

                  SECTION 3.14. Taxes. (a) For purposes of this Agreement, "Tax"
or "Taxes" means any and all taxes, fees, levies, duties, tariffs, imposts, and
other charges of any kind (together with any and all interest, penalties,
additions to tax and additional amounts imposed with respect thereto) imposed by
any governmental or taxing authority including, without limitation: taxes or
other charges on or with respect to income, franchises, windfall or other
profits, gross receipts, property, sales, use, capital stock, payroll,
employment, social security, workers' compensation, unemployment compensation,
or net worth; taxes or other charges in the nature of excise, withholding, ad
valorem, stamp, transfer, value added, or gains taxes; license, registration and
documentation fees; and customs' duties, tariffs, and similar charges.

                  (b) Except as would not have a CBS Material Adverse Effect:
(i) each of CBS and each of its subsidiaries has timely filed all federal,
state, local and foreign tax returns and reports (including extensions) required
to be filed by it and has paid and discharged all Taxes shown as due thereon and
has paid all of such other Taxes as are due, other than such payments as are
being contested in good faith by appropriate proceedings; (ii) neither the IRS
nor any other taxing authority or agency, domestic or foreign, is now asserting
or, to the knowledge of CBS after due inquiry, threatening to assert against CBS
or any of its subsidiaries any deficiency or claim for Taxes; (iii) no waiver of
any statute of limitations with respect to, or any extension of a period for the
assessment of, any Tax has been granted by CBS or any of its subsidiaries; (iv)
the accruals and reserves for Taxes reflected in the CBS 1998 Balance Sheet and
the most recent quarterly financial statements are adequate to cover all Taxes
accruable through the date thereof in accordance with generally accepted
accounting principles; (v) no election under Section 341(f) of the Code has been
made by CBS or any of its subsidiaries; (vi) CBS and each of its subsidiaries
has withheld or collected and paid over to the appropriate governmental
authorities or is properly holding for such payment all Taxes required by law to
be withheld or collected; (vii) there are no liens for Taxes upon the assets of
CBS or any of its subsidiaries, other than liens for Taxes that are being
contested in good faith by appropriate proceedings and (viii) CBS has not
constituted a "distributing corporation" (within the meaning of Section
355(a)(1)(A) of the Code) in a distribution of stock qualifying for tax-free
treatment under Section 355 of the Code in the two years prior to the date of
this Agreement.

                  SECTION 3.15. Tax Matters. None of CBS or any of its
affiliates has taken or agreed to take any action that would prevent the Merger
from constituting a transaction qualifying under Section 368(a) of the Code.
None of CBS or any of its affiliates or agents is aware of any agreement, plan
or other circumstance that would prevent the Merger from qualifying under
Section 368(a) of the Code, that could prevent them from providing
representations required in Sections 7.02(c) or 7.03(c), or that could prevent
the opinions described in such Sections from being given and to the knowledge of
CBS, the Merger will so qualify.

                  SECTION 3.16. Year 2000 Compliance. (a) CBS has adopted a plan
that it believes will cause CBS Systems (as defined
<PAGE>

                                       18

below) to be CBS Year 2000 Compliant (as defined below) (such plan, as it may be
amended, modified or supplemented from time to time being, the "CBS Year 2000
Plan") in all material respects. CBS has taken, and between the date of this
Agreement and the Effective Time will continue to take, all reasonable steps to
implement the CBS Year 2000 Plan with respect to the CBS Systems.
Notwithstanding anything in this Section 3.16 to the contrary, CBS does not
represent or warrant that CBS Systems (or any other operations, systems,
equipment or software of CBS or its subsidiaries or any of their respective
affiliates) are or will be CBS Year 2000 Compliant at or prior to the Effective
Time, regardless of whether the CBS Year 2000 Plan has or has not been
implemented or complied with.

                  (b) For purposes of this Section 3.16, (i) "CBS Systems" shall
mean all computer, hardware, software, systems, and equipment (including
embedded microcontrollers in non-computer equipment) embedded within or required
to operate the current products of CBS and its subsidiaries, and/or material to
or necessary for CBS and its subsidiaries to carry on their respective
businesses as currently conducted; and (ii) "CBS Year 2000 Compliant" means that
CBS Systems will (A) manage, accept, process, store and output data involving
dates reasonably expected to be encountered in the foreseeable future and (B)
accurately process date data from, into and between the 20th and 21st centuries
and each date during the years 1999 and 2000.

                  SECTION 3.17. Opinion of Financial Advisors. CBS has received
the written opinion of Evercore Group Inc. (the "CBS Financial Advisor") on or
prior to the date of this Agreement, to the effect that, as of the date of such
opinion, the Exchange Ratio is fair to the shareholders of CBS from a financial
point of view, and CBS will deliver a copy of such opinion to Viacom promptly
after the date of this Agreement.

                  SECTION 3.18. Vote Required. The affirmative vote of a
majority of the votes cast by all shareholders entitled to vote at the CBS
Stockholders' Meeting is the only vote of the holders of any class or series of
capital stock of CBS necessary to adopt this Agreement.

                  SECTION 3.19. Brokers. No broker, finder or investment banker
(other than the CBS Financial Advisor) is entitled to any brokerage, finder's or
other fee or commission in connection with the Merger based upon arrangements
made by or on behalf of CBS.

                  SECTION 3.20. Pennsylvania Law. Pursuant to its By-laws, CBS
has opted out of anti-takeover provisions contained in the Pennsylvania Law
relating to (i) "control share acquisitions" (Sections 2561 through 2568 of the
Pennsylvania Law) and (ii) disgorgement of profits by certain controlling
shareholders following attempts to acquire control (Sections 2571 through 2576
of the Pennsylvania Law). Section 2538 of the Pennsylvania Law relating to
"interested shareholder transactions" and Sections 2551 through 2556 of the
Pennsylvania Law relating to "business combinations with interested
shareholders" are not applicable to this Agreement or the transactions
contemplated hereby.
<PAGE>

                                       19

                  SECTION 3.21. Rights Agreement. As of the date of this
Agreement, the copy of the Rights Agreement, including all amendments and
exhibits thereto, that is set forth as an exhibit to CBS's Form 8-K, filed with
the SEC on January 9, 1996, is a complete and correct copy thereof. Neither the
execution of this Agreement nor the consummation of the Merger will (A) cause
the Rights issued pursuant to the Rights Agreement to become exercisable, (B)
cause Viacom to become an Acquiring Person or a Principal Party (as each term is
defined in the Rights Agreement) or (C) give rise to a Distribution Date (as
such term is defined in the Rights Agreement).


                                   ARTICLE IV

                    REPRESENTATIONS AND WARRANTIES OF VIACOM

                  Except as disclosed in the report on Form 10-K dated March 31,
1999 for the year ended December 31, 1998, the reports on Form 10-Q and Form 8-K
since December 31, 1998 or the proxy statement dated April 16, 1999, in each
case in the form filed by Viacom with the SEC or in a separate disclosure
schedule which has been delivered by Viacom to CBS prior to the execution of
this Agreement (the "Viacom Disclosure Schedule") (each section of which
qualifies the correspondingly numbered representation and warranty or covenant
to the extent specified therein and such other representations and warranties or
covenants to the extent a matter in such section is disclosed in such a way as
to make its relevance to the information called for by such other representation
and warranty or covenant readily apparent), Viacom hereby represents and
warrants to CBS that:

                  SECTION 4.01. Organization and Qualification; Subsidiaries.
Each of Viacom and its subsidiaries is a corporation or entity duly incorporated
or formed, validly existing and in good standing, under the laws of its
jurisdiction of incorporation or formation, and has the requisite corporate
power and authority and all necessary governmental approvals to own, lease and
operate its properties and to carry on its business as it is now being
conducted, except where the failure to have such power, authority and
governmental approvals would not have a Viacom Material Adverse Effect (as
defined below). Each of Viacom and its subsidiaries is duly qualified or
licensed as a foreign corporation to do business, and is in good standing, in
each jurisdiction where the character of the properties owned, leased or
operated by it or the nature of its business makes such qualification or
licensing necessary, except for such failures to be so qualified or licensed and
in good standing that would not have a Viacom Material Adverse Effect. The term
"Viacom Material Adverse Effect" means any change, effect or circumstance that
is or is reasonably likely to be materially adverse to the business, results of
operations or financial condition of Viacom and its subsidiaries taken as a
whole, other than any change, effect or circumstance relating to or resulting
from (i) general changes in the media or entertainment industries or the
advertising markets, (ii) changes in general economic conditions or securities
<PAGE>

                                       20

markets in general or (iii) this Agreement or the transactions contemplated
hereby or the announcement thereof.

                  SECTION 4.02. Certificate of Incorporation and By-Laws. Viacom
has made available to CBS a complete and correct copy of the Certificate of
Incorporation and the By-laws, each as amended to date, of Viacom and
Blockbuster Corporation ("Blockbuster"). The Certificates of Incorporation and
By-laws (or equivalent organizational documents) of Viacom and its subsidiaries
are in full force and effect. Except as would not have a Viacom Material Adverse
Effect, none of Viacom or its subsidiaries is in violation of any provision of
its Certificate of Incorporation or By-laws (or equivalent organizational
documents).

                  SECTION 4.03. Capitalization. The authorized capital stock of
Viacom consists of 500,000,000 shares of Viacom Class A Common Stock,
3,000,000,000 shares of Viacom Class B Common Stock and 200,000,000 shares of
Preferred Stock, par value $.01 per share, of Viacom ("Viacom Preferred Stock").
As of September 3, 1999 (a) 139,923,921 shares of Viacom Class A Common Stock
and 605,085,135 shares of Viacom Class B Common Stock were issued and
outstanding, all of which were validly issued, fully paid and nonassessable, (b)
1,356,400 shares of Viacom Class A Common Stock and 47,101,300 shares of Viacom
B Common Stock were held in the treasury of Viacom, (c) no shares of Viacom
Class A Common Stock or Viacom Class B Common Stock were held by subsidiaries of
Viacom and (d) as of September 3, 1999, approximately 1,898,946 shares of Viacom
Class B Common Stock were reserved for future issuance pursuant to stock options
or stock incentive rights (collectively "Viacom Options") granted pursuant to
Viacom's stock option plans and arrangements (the "Viacom Stock Option Plans").
As of September 3, 1999, no shares of Viacom Preferred Stock were issued and
outstanding. As of the date of this Agreement, except for the issuance of Viacom
Class B Common Stock pursuant to the exercise of Viacom Options and options to
purchase 11,600,000 shares of Class A Common Stock, par value $.01 per share, of
Blockbuster (the "Blockbuster Options") outstanding prior to September 3, no
shares of capital stock of Viacom or any of its subsidiaries have been issued
since September 3, 1999. Except as set forth in this Section 4.03, as of the
date of this Agreement, there are no options, warrants or other rights,
agreements (including registration rights agreements), arrangements or
commitments of any character relating to the issued or unissued capital stock of
Viacom or any of its subsidiaries or obligating Viacom or any of its
subsidiaries to issue or sell any shares of capital stock of, or other equity
interests in, Viacom or any of its subsidiaries. All shares of capital stock of
Viacom and its subsidiaries subject to issuance as aforesaid, upon issuance on
the terms and conditions specified in the instruments pursuant to which they are
issuable, will be duly authorized, validly issued, fully paid and nonassessable.
As of the date of this Agreement, there are no outstanding contractual material
obligations of Viacom or any subsidiary to repurchase, redeem or otherwise
acquire any shares of capital stock of Viacom or any of its subsidiaries or to
provide material funds to, or make any material investment (in the form of a
loan capital contribution or otherwise) in, any person. The Stockholder (as
defined in the Parent Voting Agreements) is the holder of a majority of the
issued and outstanding shares of Viacom Class A Common Stock.
<PAGE>

                                       21

                  SECTION 4.04. Authority Relative to Agreement. Viacom has all
necessary power and authority to execute and deliver this Agreement, to perform
its obligations hereunder and to consummate the Merger and the other
transactions contemplated hereby. The execution and delivery of this Agreement
by Viacom and the consummation by Viacom of the Merger and the other
transactions contemplated hereby have been duly and validly authorized by all
necessary corporate action and no other corporate proceedings on the part of
Viacom are necessary to authorize the execution and delivery of this Agreement
or to consummate the Merger and the other transactions contemplated hereby
(other than, with respect to the Merger, the approval of the Viacom Proposals by
the holders of a majority of the then outstanding shares of Viacom Class A
Common Stock and the filing and recordation of appropriate merger documents as
required by Delaware Law and Pennsylvania Law). This Agreement has been duly and
validly executed and delivered by Viacom and, assuming the due authorization,
execution and delivery by CBS, this Agreement constitutes a legal, valid and
binding obligation of Viacom, enforceable against Viacom in accordance with its
terms.

                  SECTION 4.05. No Conflict; Required Filings and Consents. (a)
The execution and delivery of this Agreement by Viacom does not, and the
performance of this Agreement by Viacom and the performance by Parent of the
Parent Voting Agreements will not, (i) conflict with or violate the Certificate
of Incorporation or By-laws (or similar organization documents) of (A) Viacom or
Blockbuster or (B) any of its other subsidiaries, (ii) assuming the consents,
approvals and authorizations specified in Section 4.05(b) have been received and
the waiting periods referred to therein have expired, and any condition
precedent to such consent, approval, authorization, or waiver has been
satisfied, conflict with or violate any Law applicable to Viacom or any of its
subsidiaries or by which any property or asset of Viacom or any of its
subsidiaries is bound or affected or (iii) result in any breach of or constitute
a default (or an event which with notice or lapse of time or both would become a
default) under, or give to others any right of termination, amendment,
acceleration or cancellation of, or result in the creation of a lien or other
encumbrance on any property or asset of Viacom or any of its subsidiaries
pursuant to, any note, bond, mortgage, indenture or credit agreement, or, to
Viacom's knowledge as of the date of this Agreement, any other, contract,
agreement, lease, license, permit, franchise or other instrument or obligation
to which Viacom or any of its subsidiaries is a party or by which Viacom or any
of its subsidiaries or any property or asset of Viacom or any of its
subsidiaries is bound or affected, except, in the case of clauses (i)(B), (ii)
and (iii), for any such conflicts, violations, breaches, defaults or other
occurrences of the type referred to above which would not have a Viacom Material
Adverse Effect or would not prevent or materially delay the consummation of the
Merger; provided, however, that for purposes of this Section 4.05(a), the
definition of Viacom Material Adverse Effect shall be read so as not to include
clause (iii) of the definition thereof.

                  (b) The execution and delivery of this Agreement by Viacom do
not, the performance of this Agreement by Viacom and the performance by Parent
of the Parent Voting Agreements will not, require any consent, approval,
authorization, waiver or permit of, or filing with or notification to, any
governmental or regulatory authority, domestic, foreign or
<PAGE>

                                       22

supranational, except for applicable requirements of the Exchange Act, the
Securities Act, Blue Sky Laws, the HSR Act, such filings, approvals and waivers
as may be required by the Communications Act, applicable requirements of the
Investment Canada Act of 1985 and the Competition Act (Canada), any other
non-United States competition, antitrust and investment law, filing and
recordation of appropriate merger documents as required by Delaware Law and
Pennsylvania Law and the rules of the NYSE and except where failure to obtain
such consents, approvals, authorizations or permits, or to make such filings or
notifications, would not have a Viacom Material Adverse Effect or would not
prevent or materially delay the consummation of the Merger; provided, however,
that for purposes of this Section 4.05(b), the definition of Viacom Material
Adverse Effect shall be read so as not to include clause (iii) of the definition
thereof.

                  SECTION 4.06. Permits and Licenses; Contracts. (a) Each of
Viacom and its subsidiaries is in possession of all franchises, grants,
authorizations, licenses, permits, easements, variances, exceptions, consents,
certificates, approvals and orders necessary for Viacom or any of its
subsidiaries to own, lease and operate the properties of Viacom and its
subsidiaries or to carry on their business as it is now being conducted and
contemplated to be conducted (the "Viacom Permits"), and no suspension or
cancellation of any of the Viacom Permits is pending or, to the knowledge of
Viacom, threatened, except where the failure to have, or the suspension or
cancellation of, any of the Viacom Permits would not have a Viacom Material
Adverse Effect. None of Viacom or any of its subsidiaries is in conflict with,
or in default or violation of (i) any Laws applicable to Viacom or any of its
subsidiaries or by which any property or asset of Viacom or any of its
subsidiaries is bound or affected, (ii) any of the Viacom Permits, or (iii) any
note, bond, mortgage, indenture, contract, agreement, lease, license, permit,
franchise or other instrument or obligation to which Viacom or any of its
subsidiaries is a party or by which Viacom or any of its subsidiaries or any
property or asset of Viacom or any of its subsidiaries is bound or affected,
except for any such conflicts, defaults or violations that would not have a
Viacom Material Adverse Effect.

                  (b) Except as would not have a Viacom Material Adverse Effect,
and to the knowledge of Viacom, except as would not have a material adverse
effect on the Surviving Corporation following the Effective Time, none of Viacom
or any of its subsidiaries is a party to any contracts or agreements that limits
the ability of Viacom or any of its subsidiaries to compete in any line of
business or with any person or engage in any business in any geographic area, in
each case except for competition in businesses that neither CBS nor Viacom are
currently engaged in or will reasonably foreseeably engage in.

                  (c) Viacom and its subsidiaries have operated the radio and
television stations and associated facilities for which Viacom or any of its
subsidiaries holds licenses from the FCC, in each case which are owned or
operated by Viacom and its subsidiaries (the "Viacom Licensed Facilities"), in
material compliance with the terms of the Viacom Permits issued by the FCC to
Viacom and its subsidiaries ("Viacom FCC Licenses"), and in material compliance
with the
<PAGE>

                                       23

Communications Act, and Viacom and its subsidiaries have timely filed
or made all applications, reports and other disclosures required by the FCC to
be filed or made with respect to the Viacom Licensed Facilities and have timely
paid all FCC regulatory fees with respect thereto, in each case except as would
not have a Viacom Material Adverse Effect. As of the date hereof, to Viacom's
knowledge, there is not now pending or threatened before the FCC any material
investigation, proceeding, notice of violation, order of forfeiture or complaint
against Viacom or any of its subsidiaries, relating to any of the Viacom
Licensed Facilities or FCC regulated services conducted by CBS that, if
adversely decided, would have a Viacom Material Adverse Effect.

                  SECTION 4.07. SEC Filings; Financial Statements. (a) Viacom
and Blockbuster have filed all forms, reports and documents required to be filed
by it with the SEC from December 31, 1996 to the date of this Agreement,
including: (i) Annual Reports on Form 10-K, (ii) Quarterly Reports on Form 10-Q
and (iii) proxy statements relating to Viacom's and Blockbuster's meetings of
stockholders (whether annual or special) (the forms, reports and other documents
referred to in clauses (i), (ii), (iii) and all other forms, reports and other
registration statements filed by Viacom or Blockbuster with the SEC as of the
date of this Agreement, including all amendments and supplements thereto filed
with the SEC as of the date of this Agreement, above being referred to herein,
collectively, as the "Viacom SEC Reports"). The Viacom SEC Reports, as well as
all forms, reports and documents to be filed by Viacom or Blockbuster with the
SEC after the date hereof and prior to the Effective Time, (i) were or will be
prepared in accordance with the requirements of the Securities Act, and the
Exchange Act, as the case may be, and the rules and regulations thereunder, (ii)
did not at the time they were filed, or will not at the time they are filed,
contain any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary in order to make the statements made
therein, in the light of the circumstances under which they were made, not
misleading, and (iii) did not at the time they were filed, or will not at the
time they are filed, omit any documents required to be filed as exhibits
thereto. No Viacom subsidiary, except Blockbuster, is subject to the periodic
reporting requirements of the Exchange Act.

                  (b) Each of the financial statements (including, in each case,
any notes thereto) contained in the Viacom SEC Reports and each of the financial
statements to be filed by Viacom or Blockbuster with the SEC after the date
hereof and prior to the Effective Time was or will be prepared in accordance
with United States generally accepted accounting principles applied on a
consistent basis throughout the periods indicated (except as may be indicated in
the notes thereto) and each fairly presented in all material respects or will
fairly present in all material respects the consolidated financial position,
results of operations and cash flows of Viacom and its subsidiaries as at the
respective dates thereof and for the respective periods indicated therein in
accordance with generally accepted accounting principles (subject, in the case
of unaudited statements, to normal and recurring year-end adjustments which were
not and are not expected to be material).
<PAGE>

                                       24

                  (c) Except as and to the extent set forth in the Viacom SEC
Reports, Viacom and its subsidiaries do not have any liability or obligation of
any nature (whether accrued, absolute, contingent or otherwise) other than
liabilities and obligations which, individually or in the aggregate, would not
have a Viacom Material Adverse Effect.

                  (d) Viacom has heretofore furnished to CBS complete and
correct copies of all material amendments and modifications that have not been
filed by Viacom or Blockbuster with the SEC to all agreements, documents and
other instruments that previously had been filed by Viacom or Blockbuster with
the SEC and are currently in effect.

                  SECTION 4.08. Absence of Certain Changes or Events. (a) Since
December 31, 1998, except as disclosed in any Viacom SEC Report or as
contemplated by this Agreement, there has not been any change, event or
circumstance which, when taken individually or together with all other changes,
events or circumstances, has had or would have a Viacom Material Adverse Effect,
and (b) since December 31, 1998 to the date of this Agreement, except as
disclosed in any Viacom SEC Reports (i) each of Viacom and its subsidiaries has
conducted its businesses only in the ordinary course and in a manner consistent
with past practice and (ii) there has not been (A) any material change by Viacom
or any of its subsidiaries in its material accounting policies, practices and
procedures, (B) any entry by Viacom or any of its subsidiaries into any
commitment or transaction material to Viacom and its subsidiaries taken as a
whole other than in the ordinary course of business consistent with past
practice, (C) any declaration, setting aside or payment of any dividend or
distribution in respect of any capital stock of Viacom or any of its
subsidiaries (other than cash dividends payable by any wholly owned subsidiary
to another subsidiary or Viacom), or (D) any increase in the compensation
payable or to become payable to any corporate officers or heads of divisions of
Viacom or any of its subsidiaries, except in the ordinary course of business
consistent with past practice.

                  SECTION 4.09. Absence of Litigation. Except as disclosed in
any Viacom SEC Report, there is no claim, action, proceeding or investigation
pending or, to the knowledge of Viacom, threatened against Viacom or any of its
subsidiaries, or any property or asset of Viacom or any of its subsidiaries,
before any court, arbitrator or Governmental Authority, in each case except as
would not have a Viacom Material Adverse Effect. As of the date of this
Agreement, none of Viacom, any of its subsidiaries nor any property or asset of
Viacom or any of its subsidiaries is subject to any order, writ, judgment,
injunction, decree, determination or award imposed by any court, arbitration or
Governmental Authority, in each case except as would not have a Viacom Material
Adverse Effect.

                  SECTION 4.10. Employee Benefit Plans. (a) With respect to each
employee benefit plan, program, arrangement and contract (including, without
limitation, any "employee benefit plan", as defined in Section 3(3) of ERISA),
maintained or contributed to by Viacom or any of its subsidiaries, or with
respect to which Viacom or any of its subsidiaries could incur liability under
Section 4069 of ERISA, other than multiemployer plans within the meaning of
<PAGE>

                                       25

Section 3(37) of ERISA (the "Viacom Benefit Plans"), Viacom will provide to CBS
within 15 days of this Agreement a true and correct copy of (i) the most recent
annual report (Form 5500) filed with the IRS, (ii) such Viacom Benefit Plan,
(iii) each trust agreement relating to such Viacom Benefit Plan, (iv) the most
recent summary plan description for each Viacom Benefit Plan for which a summary
plan description is required, (v) the most recent actuarial report or valuation
relating to a Viacom Benefit Plan subject to Title IV of ERISA, if any, and (vi)
the most recent determination letter, if any, issued by the IRS with respect to
any Viacom Benefit Plan qualified under Section 401(a) of the Code. Viacom will
promptly following the date of this Agreement request a copy of each Viacom
Benefit Plan that is a multiemployer plan within the meaning of Section 3(37) of
ERISA from the trustees of such multiemployer plan and Viacom shall deliver such
copy of the plan to CBS promptly upon its receipt thereof.

                  (b) Each Viacom Benefit Plan has been administered in
accordance with its terms, and in compliance with applicable laws, except as
would not have a Viacom Material Adverse Effect. Viacom and its subsidiaries
have performed all obligations required to be performed by them under, are not
in any respect in default under or in violation of, and have no knowledge of any
default or violation by any party to, any Viacom Benefit Plans, except as would
not have a Viacom Material Adverse Effect. With respect to the Viacom Benefit
Plans, no event has occurred and, to the knowledge of Viacom, there exists no
condition or set of circumstances, in connection with which Viacom or any of its
subsidiaries is reasonably likely to be subject to any liability under the terms
of such Viacom Benefit Plans, ERISA, the Code or any other applicable Law except
as would not have a Viacom Material Adverse Effect. Neither Viacom nor any of
its subsidiaries has any actual or contingent liability under Title IV of ERISA
(other than the payment of premiums to the Pension Benefit Guaranty Corporation)
except as would not have a Viacom Material Adverse Effect. Neither Viacom nor
any of its subsidiaries has any actual or contingent liability under Title IV of
ERISA (other than the payment of premiums to the Pension Benefit Guaranty
Corporation), including, without limitation, any liability in connection with
(i) the termination or reorganization of any employee benefit plan subject to
Title IV of ERISA or (ii) the withdrawal from any Multiemployer Plan or Multiple
Employer Plan, and no fact or event exists which is reasonably likely to give
rise to any such liability, except as would not, individually or in the
aggregate, have a Viacom Material Adverse Effect.

                  (c) Viacom has made available to CBS (i) copies of all
employment agreements with the top five most highly compensated executive
officers of Viacom or any of its subsidiaries; (ii) copies of all material
severance agreements, programs and policies of Viacom or any of its subsidiaries
with or relating to its or its subsidiaries' employees; and (iii) copies of all
material plans, programs, agreements and other arrangements of Viacom or any of
its subsidiaries with or relating to its or its subsidiaries' employees which
contain change in control provisions. Neither the execution and delivery of this
Agreement nor the consummation of the transactions contemplated hereby will (i)
result in any payment (including, without limitation, severance, unemployment
compensation, "golden parachute" or otherwise) becoming due to any director,
<PAGE>

                                       26

officer or employee of Viacom or any of its subsidiaries from Viacom or any of
its affiliates under any Viacom Benefit Plan or otherwise, which payment is
material in relation to the compensation previously provided to such individual
(other than payments resulting from a change in responsibilities or reporting
obligations of individual employees), (ii) materially increase any benefits
otherwise payable under any Viacom Benefit Plan, which increase is material in
relation to the benefits previously provided or (iii) result in any acceleration
of the time of payment or vesting of any material benefits.

                  (d) Each Viacom Benefit Plan that is intended to be qualified
under Section 401(a) of the Code or Section 401(k) of the Code has timely
received a favorable determination letter from the IRS covering all of the
provisions applicable to the Plan for which determination letters are currently
available that the Viacom Benefit Plan is so qualified and each trust
established in connection with any Viacom Benefit Plan which is intended to be
exempt from federal income taxation under Section 501(a) of the Code has
received a determination letter from the IRS that it is so exempt, and no fact
or event has occurred since the date of such determination letter or letters
from the IRS which is reasonably likely to adversely affect the qualified status
of any such Viacom Benefit Plan or the exempt status of any such trust.

                  SECTION 4.11. Labor Matters. There is no labor dispute, strike
or work stoppage against Viacom or any of its subsidiaries pending or, to the
knowledge of Viacom, threatened which would reasonably be expected to interfere
with the respective business activities of Viacom or any of its subsidiaries,
except for such disputes, strikes or work stoppages which would not have a
Viacom Material Adverse Effect. There is no charge or complaint against Viacom
or any of its subsidiaries by the National Labor Relations Board or any
comparable state agency pending or threatened in writing, except for such
charges or complaints (or related unfair labor practices) which would not have a
Viacom Material Adverse Effect.

                  SECTION 4.12. Environmental Matters. Except as would not,
individually or in the aggregate, have a Viacom Material Adverse Effect:

                  (a) Viacom and its subsidiaries (i) are in compliance with
         all, and are not subject to any asserted liability or, to Viacom's
         knowledge, any liability (including liability with respect to current
         or former subsidiaries or operations), in each case with respect to
         any, Environmental Laws (as defined below), (ii) hold or have applied
         for all Environmental Permits (as defined below) and (iii) are in
         compliance with their respective Environmental Permits;

                  (b) neither Viacom nor any Viacom subsidiary has received any
         written notice, demand, letter, claim or request for information
         alleging that Viacom or any of its subsidiaries is or may be in
         violation of, or liable under, any Environmental Law;
<PAGE>

                                       27

                  (c) neither Viacom nor any of its subsidiaries (i) has entered
         into or agreed to any consent decree or order or is subject to any
         judgment, decree or judicial order relating to compliance with
         Environmental Laws, Environmental Permits or the investigation,
         sampling, monitoring, treatment, remediation, removal or cleanup of
         Hazardous Materials (as defined below) and, to the knowledge of Viacom,
         no investigation, litigation or other proceeding is pending or
         threatened in writing with respect thereto, or (ii) is an indemnitor
         in connection with any threatened or asserted claim by any third-party
         indemnitee for any liability under any Environmental Law or relating to
         any Hazardous Materials; and

                  (d) none of the real property owned or leased by Viacom or any
         of its subsidiaries is listed or, to the knowledge of Viacom, proposed
         for listing on the "National Priorities List" under CERCLA, as updated
         through the date hereof, or any similar state or foreign list of sites
         requiring investigation or cleanup.

                  SECTION 4.13. Trademarks, Patents and Copyrights. Except as
would not have a Viacom Material Adverse Effect, Viacom and its subsidiaries
own, or possess adequate licenses or other valid rights to use, all material
patents, patent rights, trademarks, trademark rights, trade names, trade name
rights, copyrights, service marks, service mark rights, trade secrets,
applications to register, and registrations for, the foregoing trademarks,
service marks, know-how and other proprietary rights and information used in
connection with the business of Viacom and its subsidiaries as currently
conducted, and no assertion or claim has been made in writing challenging the
validity of any of the foregoing which would have a Viacom Material Adverse
Effect. To the knowledge of Viacom, the conduct of the business of Viacom and
its subsidiaries as currently conducted does not conflict in any way with any
patent, patent right, license, trademark, trademark right, trade name, trade
name right, service mark or copyright of any third party, except for such
conflicts which would not have a Viacom Material Adverse Effect.

                  SECTION 4.14. Taxes. Except as would not have a Viacom
Material Adverse Effect, (a) each of Viacom and each of its subsidiaries has
timely filed all federal, state, local and foreign tax returns and reports
(including extensions) required to be filed by it and has paid and discharged
all Taxes shown as due thereon and has paid all of such other Taxes as are due,
other than such payments as are being contested in good faith by appropriate
proceedings, (b) neither the IRS nor any other taxing authority or agency,
domestic or foreign, is now asserting or, to the knowledge of Viacom after due
inquiry, threatening to assert against Viacom or any of its subsidiaries any
deficiency or claim for Taxes, (c) no waiver of any statute of limitations with
respect to, or any extension of a period for the assessment of, any Tax has been
granted by Viacom or any of its subsidiaries, (d) the accruals and reserves for
Taxes reflected in the Viacom 1998 Balance Sheet and the most recent quarterly
financial statements are adequate to cover all Taxes accruable through the date
thereof in accordance with generally accepted accounting principles, (e) no
election under Section 341(f) of the Code has been made by Viacom or any of its
subsidiaries, (f) Viacom and each of its subsidiaries has withheld or collected
and paid over to
<PAGE>

                                       28

the appropriate governmental authorities or is properly holding for such payment
all Taxes required by law to be withheld or collected, (g) there are no liens
for Taxes upon the assets of Viacom or any of its subsidiaries, other than liens
for Taxes that are being contested in good faith by appropriate proceedings and
(h) Viacom has not constituted a "distributing corporation" (within the meaning
of Section 355(a)(1)(A) of the Code) in a distribution of stock qualifying for
tax-free treatment under Section 355 of the Code in the two years prior to the
date of this Agreement.

                  SECTION 4.15. Tax Matters. None of Viacom or any of its
affiliates has taken or agreed to take any action that would prevent the Merger
from constituting a transaction qualifying under Section 368(a) of the Code.
None of Viacom or any of its affiliates or agents is aware of any agreement,
plan or other circumstance that would prevent the Merger from qualifying under
Section 368(a) of the Code, that could prevent them from providing
representations required in Sections 7.02(c) or 7.03(c), or that could prevent
the opinions described in such Sections from being given and to the knowledge of
Viacom the Merger will so qualify.

                  SECTION 4.16. Year 2000 Compliance. (a) Viacom has adopted a
plan that it believes will cause Viacom Systems (as defined below) to be Viacom
Year 2000 Compliant (as defined below) (such plan, as it may be amended,
modified or supplemented from time to time being, the "Viacom Year 2000 Plan")
in all material respects. Viacom has taken, and between the date of this
Agreement and the Effective Time will continue to take, all reasonable steps to
implement the Viacom Year 2000 Plan with respect to the Viacom Systems.
Notwithstanding anything in this Section 4.16 to the contrary, Viacom does not
represent or warrant that Viacom Systems (or any other operations, systems,
equipment or software of Viacom or its subsidiaries or any of their respective
affiliates) are or will be Viacom Year 2000 Compliant at or prior to the
Effective Time, regardless of whether the Viacom Year 2000 Plan has or has not
been implemented or complied with.

                  (b) For purposes of this Section 4.16, (i) "Viacom Systems"
shall mean all computer, hardware, software, systems, and equipment (including
embedded microcontrollers in non-computer equipment) embedded within or required
to operate the current products of Viacom and its subsidiaries, and/or material
to or necessary for Viacom and its subsidiaries to carry on their respective
businesses as currently conducted; and (ii) "Viacom Year 2000 Compliant" means
that Viacom Systems will (A) manage, accept, process, store and output data
involving dates reasonably expected to be encountered in the foreseeable future
and (B) accurately process date data from, into and between the 20th and 21st
centuries and each date during the years 1999 and 2000.

                  SECTION 4.17. Opinion of Financial Advisors. Viacom has
received the written opinion of Morgan Stanley Dean Witter & Co. (the "Viacom
Financial Advisor") on or prior to the date of this Agreement, to the effect
that, as of the date of such opinion, the Exchange Ratio
<PAGE>

                                       29

is fair to the stockholders of Viacom, from a financial point of view, and
Viacom will deliver a copy of such opinion to CBS promptly after the date of
this Agreement.

                  SECTION 4.18. Vote Required. The affirmative vote of the
holders of a majority of the outstanding Viacom Class A Common Stock is the only
vote of the holders of any class or series of capital stock of Viacom necessary
to approve the transactions contemplated by this Agreement.

                  SECTION 4.19. Section 203 of Delaware Law. The Board of
Directors of Viacom has approved this Agreement and such Viacom approval is
sufficient to render inapplicable to this Agreement, the Parent Voting
Agreements and the transactions contemplated hereby and thereby the provisions
of Section 203 of Delaware Law.

                  SECTION 4.20. Brokers. No broker, finder or investment banker
(other than the Viacom Financial Advisor) is entitled to any brokerage, finder's
or other fee or commission in connection with the Merger based upon arrangements
made by or on behalf of Viacom.


                                    ARTICLE V

                     CONDUCT OF BUSINESS PENDING THE MERGER

                  SECTION 5.01. Conduct of Business by CBS Pending the Merger.
CBS covenants and agrees that, between the date of this Agreement and the
Effective Time, except (w) as contemplated by this Agreement or as set forth in
Section 5.01 of the CBS Disclosure Schedule, (x) as Viacom shall otherwise agree
in advance in writing, which agreement shall not be unreasonably withheld or
delayed, (y) for actions taken in connection with the consummation of the
acquisitions of King World, Outdoor Systems, Inc. and Gaylord Entertainment
Company (the "Pending Transactions") on substantially the same terms that have
heretofore been agreed between such parties or on such other terms and
conditions which would not be reasonably likely to have an impact that is both
material and detrimental to Circle and its subsidiaries, taken as a whole,
unless Viacom shall have consented thereto, such consent not to be unreasonably
withheld or delayed, and (z) for the exercise of options, warrants and similar
securities which would otherwise expire prior to the Effective Time, or the
exercise of any put rights, call rights, rights of first refusal and other
similar rights, in each case under agreements in existence on the date of this
Agreement and otherwise in accordance with the terms of this Agreement, the
business of CBS and its subsidiaries shall be conducted only in, and CBS and its
subsidiaries shall not take any action except in, the ordinary course of
business and in a manner consistent with past practice; and CBS and its
subsidiaries shall use their reasonable best efforts to preserve substantially
intact CBS's business organization, to keep available the services of the
current officers, employees and consultants of CBS and its subsidiaries
(provided that the foregoing covenant to use reasonable best efforts shall not
require CBS to offer retention bonuses to such
<PAGE>

                                       30

individuals) and to preserve the current relationships of CBS and its
subsidiaries with customers, distributors, dealers, suppliers and other persons
with which CBS and its subsidiaries have significant business relations. By way
of amplification and not limitation, between the date of this Agreement and the
Effective Time, CBS will not do, and will not permit any of its subsidiaries to
do, directly or indirectly, any of the following except in compliance with the
exceptions listed above:

                  (a) amend or otherwise change the Articles of Incorporation or
         By-laws of CBS or any CBS subsidiary other than Infinity if such
         amendment or change would have a CBS Material Adverse Effect;

                  (b) issue, sell, pledge, dispose of, grant, encumber, or
         authorize the issuance, sale, pledge, disposition, grant or encumbrance
         of, (i) any shares of its or its subsidiaries' capital stock, or any
         options, warrants, convertible securities or other rights of any kind
         to acquire any shares of its or its subsidiaries' capital stock or any
         other ownership interest (including any phantom interest), of CBS or
         any of its subsidiaries (except (A) for the issuance of Shares issuable
         pursuant to CBS Options or shares of Infinity common stock pursuant to
         Infinity stock options outstanding on the date hereof, (B) for the
         issuance of options, and other stock grants of CBS or Shares which do
         not provide for accelerated vesting in connection with the Merger and
         the other transactions contemplated by this Agreement (except as
         permitted under any severance arrangement established by CBS in
         accordance with Section 6.16 hereof or with respect to 1,200,000
         options to be issued to two senior executives of Kingworld upon its
         acquisition by CBS), (x) to purchase a maximum of 5,000,000 Shares, (y)
         to purchase a maximum of 17,200,000 Shares as set forth in Section 5.01
         of the CBS Disclosure Schedule and (z) to purchase a maximum of
         12,500,000 shares of Infinity common stock as set forth in Section 5.01
         of the CBS Disclosure Schedule, in each case in the ordinary course of
         business consistent with past practice and allocated to persons who are
         officers, employees, directors, independent contractors and production
         company writers and talent of CBS or Infinity, as applicable, or any of
         their respective subsidiaries (including past practice of any such
         subsidiary before its acquisition by CBS) and (C) the issuance of
         shares of CBS and Infinity stock in connection with the Pending
         Transactions) or (ii) any assets material to CBS and its subsidiaries,
         taken as a whole, except for sales in the ordinary course of business
         and in a manner consistent with past practice;

                  (c) declare, set aside, make or pay any dividend or other
         distribution, payable in cash, stock, property or otherwise, with
         respect to any of its or its subsidiaries' capital stock other than
         cash dividends payable by any wholly owned CBS subsidiary to another
         CBS subsidiary or CBS and other than dividends made or paid by
         Infinity, so long as the aggregate amount of such dividends paid by
         Infinity shall not exceed $500,000,000;
<PAGE>

                                       31

                  (d) reclassify, combine, split, subdivide or redeem, purchase
         or otherwise acquire, directly or indirectly, any of its or its
         subsidiaries' capital stock;

                  (e) (i) except in connection with the Pending Transactions and
         in connection with acquisitions which individually do not exceed
         $200,000,000 and in the aggregate do not exceed $1,000,000,000 (A)
         acquire (including by merger, consolidation, or acquisition of stock or
         assets), or otherwise make any investment in, any corporation,
         partnership, limited liability company, other business organization or
         any division thereof, or any material amount of assets; or (B) incur
         any indebtedness for borrowed money, issue any debt securities, assume,
         guarantee or endorse, or otherwise as an accommodation become
         responsible for, the obligations of any person, agree to amend or
         otherwise modify in any manner any agreement or instrument pursuant to
         which CBS has incurred indebtedness, or make any loans or advances,
         except in the ordinary course of business and consistent with past
         practice, except the refinancing of existing indebtedness, borrowings
         under commercial paper programs in the ordinary course of business or
         borrowings under existing bank lines of credit in the ordinary course
         of business, (ii) enter into any material contract, agreement or
         transaction, other than (X) in the ordinary course of business, and (Y)
         which would not be reasonably likely to prevent or materially delay the
         consummation of the Merger, (iii) authorize any capital expenditures
         which are, in the aggregate, in excess of the amounts currently
         budgeted for the fiscal year 1999 (including the applicable 1999
         capital expenditures of the companies subject to the Pending
         Transactions) and, with respect to fiscal year 2000, 10% in excess of
         such amount, in each case for CBS and its subsidiaries taken as a whole
         or (iv) enter into or amend any contract, agreement, commitment or
         arrangement which would require CBS to take any action prohibited by
         this subsection (e) and will, or will cause Infinity to, not amend in
         any material respect, or waive any material right or condition under or
         relating to the definitive agreements relating to the Pending
         Transactions, in each case except for any such amendment or waiver the
         impact of which would not be reasonably likely to be both material and
         detrimental to CBS and its subsidiaries, taken as a whole;

                  (f) increase the compensation payable or to become payable to
         its executive officers or employees, except as set forth in Section
         6.16 or as required by Law or by the terms of any collective bargaining
         agreement or other agreement currently in effect between CBS or any
         subsidiary of CBS and any executive officer or employee thereof and
         except for increases in the ordinary course of business in accordance
         with past practices, or grant any severance or termination pay to, or
         enter into any employment or severance agreement with, any director or
         executive officer of it or any of its subsidiaries, or establish,
         adopt, enter into or amend in any material respect or take action to
         accelerate any rights or benefits under any collective bargaining,
         bonus, profit sharing, thrift, compensation, stock option, restricted
         stock, pension, retirement, deferred compensation, employment,
         termination, severance or other plan, agreement, trust, fund, policy or
         arrangement for the benefit of any director, executive officer or
         employee, provided that
<PAGE>

                                       32

         this clause shall not prevent any CBS subsidiary from (i) entering into
         employment contracts with newly-hired or promoted executive officers,
         or from making severance payments, on terms substantially consistent
         with the contractual arrangements currently existing at such subsidiary
         or (ii) providing for the payment of severance to executive officers or
         employees on terms substantially consistent with the past practices of
         such subsidiary (including past practice preceding such subsidiaries'
         acquisition by CBS);

                  (g) change in any material respect (except as required by the
         SEC or changes in United States generally accepted accounting
         principles which become effective after the date of this Agreement) any
         accounting policies, practices or procedures;

                  (h) make any tax election that, individually or in the
         aggregate, would have a CBS Material Adverse Effect or settle or
         compromise any material Tax liability; or

                  (i) enter into any contract, agreement, lease, license,
         permit, franchise or other instrument or obligation which if in
         existence and known to CBS prior to the date of this Agreement would
         have resulted in a breach of Section 3.05, except to the extent the
         conflict, violation, breach, default or occurrence of the type referred
         to therein giving rise to such breach would not have a CBS Material
         Adverse Effect;

provided, that Infinity shall not be prohibited from taking any action under
this Section 5.01 which the Board of Directors of Infinity determines is
required to be taken in the exercise of the Board's fiduciary duties to the
stockholders of Infinity (other than CBS).

                  SECTION 5.02. Conduct of Business by Viacom Pending the
Merger. Viacom covenants and agrees that, between the date of this Agreement and
the Effective Time, except (w) as contemplated by this Agreement or as set forth
in Schedule 5.02 of the Viacom Disclosure Schedule, (x) as CBS shall otherwise
agree in advance in writing, which agreement shall not be unreasonably withheld
or delayed (y) for the exercise of options, warrants and similar securities
which would otherwise expire prior to the Effective Time, or the exercise of any
put rights, call rights, rights of first refusal and other similar rights, in
each case under agreements in existence on the date of this Agreement and
otherwise in accordance with the terms of this Agreement and (z) an exchange
offer of Blockbuster shares owned by Viacom for shares of Viacom Class B Common
Stock owned by the stockholders of Viacom (the "Split-off") in accordance with
the procedures set forth in Section 5.02 of the Viacom Disclosure Schedule, the
business of Viacom and its subsidiaries shall be conducted only in, and Viacom
and its subsidiaries shall not take any action except in, the ordinary course of
business and in a manner consistent with past practice; and Viacom and its
subsidiaries shall use their reasonable best efforts to preserve substantially
intact Viacom's business organization, to keep available the services of the
current officers, employees and consultants of Viacom and its subsidiaries
(provided that the foregoing covenant to use reasonable best efforts shall not
require Viacom to offer retention bonuses to such individuals) and to preserve
the current relationships of Viacom and its subsidiaries with
<PAGE>

                                       33

customers, distributors, suppliers and other persons with which Viacom and its
subsidiaries have significant business relations. By way of amplification and
not limitation, between the date of this Agreement and the Effective Time,
Viacom will not do, and will not permit any of its subsidiaries to do, directly
or indirectly, any of the following except in compliance with the exceptions
listed above:

                  (a) amend or otherwise change the Certificate of Incorporation
         or By-laws of Viacom or Blockbuster, or any other Viacom subsidiary if
         such amendment or change would have a Viacom Material Adverse Effect;

                  (b) issue, sell, pledge, dispose of, grant, encumber, or
         authorize the issuance, sale, pledge, disposition, grant or encumbrance
         of, (i) any shares of its or its subsidiaries' capital stock, or any
         options, warrants, convertible securities or other rights of any kind
         to acquire any shares of its or its subsidiaries' capital stock or any
         other ownership interest (including any phantom interest), of Viacom or
         any of its subsidiaries (except (A) for the issuance of Shares issuable
         pursuant to Viacom Options outstanding on the date hereof and (B) for
         the issuance of options, which do not provide for accelerated vesting
         or other consequences in connection with the Merger and the other
         transactions contemplated by this Agreement, to purchase a maximum of
         6,000,000 shares of Viacom Class B Common Stock in the ordinary course
         of business consistent with past practice and allocated to persons who
         are officers, employees, directors, independent contractors and
         production company writers and talent of Viacom or any of its
         subsidiaries on a basis substantially consistent with past practice),
         or (ii) any assets material to Viacom and its subsidiaries, taken as a
         whole, except for sales in the ordinary course of business and in a
         manner consistent with past practice;

                  (c) declare, set aside, make or pay any dividend or other
         distribution, payable in cash, stock, property or otherwise, with
         respect to any of its or its subsidiaries' capital stock other than
         cash dividends payable by any wholly owned Viacom subsidiary to another
         Viacom subsidiary or Viacom, other than dividends made or paid by
         Blockbuster, so long as the aggregate amount of such dividends paid by
         Blockbuster shall not exceed $50,000,000;

                  (d) reclassify, combine, split, subdivide or redeem, purchase
         or otherwise acquire, directly or indirectly, any of its or its
         subsidiaries' capital stock;

                  (e) (i) except in connection with acquisitions which
         individually do not exceed $200,000,000 and in the aggregate do not
         exceed $1,000,000,000 (A) acquire (including by merger, consolidation,
         or acquisition of stock or assets), or otherwise make any investment
         in, any corporation, partnership, limited liability company, other
         business organization or any division thereof, or any material amount
         of assets; or (B) incur any indebtedness for borrowed money, issue any
         debt securities, assume, guarantee or
<PAGE>

                                       34

         endorse, or otherwise as an accommodation become responsible for, the
         obligations of any person, agree to amend or otherwise modify in any
         manner any agreement or instrument pursuant to which Viacom has
         incurred indebtedness, or make any loans or advances, except in the
         ordinary course of business and consistent with past practice, except
         the refinancing of existing indebtedness, borrowings under commercial
         paper programs in the ordinary course of business or borrowings under
         existing bank lines of credit in the ordinary course of business, (ii)
         enter into any contract, agreement or transaction, other than (X) in
         the ordinary course of business, consistent with past practice and (Y)
         which would not be reasonably likely to prevent or materially delay the
         consummation of the Merger, (iii) authorize any capital expenditures
         which are, in the aggregate, in excess of the amount currently budgeted
         therefor (and previously disclosed to CBS) for the fiscal year ending
         December 31, 1999, and, with respect to fiscal year December 31, 2000,
         10% in excess of such amount, in each case for Viacom and its
         subsidiaries taken as a whole or (iv) enter into or amend any contract,
         agreement, commitment or arrangement which would require Viacom to take
         any action prohibited by this subsection (e);

                  (f) increase the compensation payable or to become payable to
         its executive officers or employees, except as required by Law or by
         the terms of any collective bargaining agreement or other agreement
         currently in effect between Viacom or any subsidiary of Viacom and any
         executive officer or employee thereof and except for increases in the
         ordinary course of business in accordance with past practices, or grant
         any severance or termination pay to, or enter into any employment or
         severance agreement with, any director or executive officer of it or
         any of its subsidiaries, or establish, adopt, enter into or amend in
         any material respect or take action to accelerate any rights or
         benefits under any collective bargaining, bonus, profit sharing,
         thrift, compensation, stock option, restricted stock, pension,
         retirement, deferred compensation, employment, termination, severance
         or other plan, agreement, trust, fund, policy or arrangement for the
         benefit of any director, executive officer or employee, provided that
         this clause shall not prevent any Viacom subsidiary from (i) entering
         into employment contracts with newly- hired or promoted executive
         officers on terms substantially consistent with the contractual
         arrangements currently existing at such subsidiary or (ii) providing
         for the payment of severance to executive officers or employees on
         terms substantially consistent with the past practices of such
         subsidiary;

                  (g) change in any material respect (except as required by the
         SEC or changes in United States generally accepted accounting
         principles which become effective after the date of this Agreement) any
         accounting policies, practices or procedures;

                  (h) make any tax election that, individually or in the
         aggregate, would have a Viacom Material Adverse Effect or settle or
         compromise any material Tax liability; or
<PAGE>

                                       35

                  (i) enter into any contract, agreement, lease, license,
         permit, franchise or other instrument or obligation which if in
         existence and known to Viacom prior to the date of this Agreement would
         have resulted in a breach of Section 4.05, except to the extent the
         conflict, violation breach, default or occurrence of the type referred
         to therein giving rise to such breach would not have a Viacom Material
         Adverse Effect;

provided, that Blockbuster shall not be prohibited from taking any action under
this Section 5.02 which the Board of Directors of Blockbuster determines is
required to be taken in the exercise of the Board's fiduciary duties to the
stockholders of Blockbuster (other than Viacom).

                  SECTION 5.03. Other Actions. Except as required by Law, CBS
and Viacom shall not, and shall not permit any of their respective subsidiaries
to, take any action that would, or that is reasonably likely to, result in any
of the conditions to the Merger set forth in Article VII not being satisfied.


                                   ARTICLE VI

                              ADDITIONAL AGREEMENTS

                  SECTION 6.01. Registration Statement; Joint Proxy Statement.
(a) As promptly as practicable after the execution of this Agreement, (i) Viacom
and CBS shall cooperate in preparing and each shall cause to be filed with the
SEC a joint proxy statement (together with any amendments thereof or supplements
thereto, the "Proxy Statement") relating to the meetings of Viacom's and CBS's
stockholders to be held to consider approval and adoption of this Agreement and
the Viacom Proposals and (ii) Viacom shall prepare and file with the SEC a
registration statement on Form S-4 (together with all amendments thereto, the
"Registration Statement") in which the Proxy Statement shall be included as a
prospectus, in connection with the registration under the Securities Act of the
shares of Viacom Class B Common Stock to be issued to the shareholders of CBS
pursuant to the Merger. Each of Viacom and CBS shall use its reasonable best
efforts to cause the Registration Statement to become effective as promptly as
practicable, and, prior to the effective date of the Registration Statement,
Viacom shall use reasonable best efforts to take all or any action required
under any applicable federal or state securities Laws in connection with the
issuance of shares of Viacom Class B Common Stock pursuant to the Merger. Each
of Viacom and CBS shall furnish all information concerning it as may reasonably
be requested by the other party in connection with such actions and the
preparation of the Registration Statement and Proxy Statement. As promptly as
practicable after the Registration Statement shall have become effective, each
of Viacom and CBS shall mail the Proxy Statement to its stockholders and to its
shareholders, respectively. Each of Viacom and CBS shall also promptly file, use
reasonable best efforts to cause to become effective as promptly as practicable
and, if required, mail to its stockholders and shareholders, respectively, any
<PAGE>

                                       36

amendment to the Registration Statement or Proxy Statement which may become
necessary after the date the Registration Statement is declared effective.

                  (b) (i) The Proxy Statement shall include the recommendation
of the Board of Directors of Viacom to the stockholders of Viacom in favor of
approval of the Viacom Proposals; provided, however, that the Board of Directors
of Viacom may take or disclose to its stockholders a position contemplated by
Rule 14e-2(a) promulgated under the Exchange Act or make any disclosure required
under applicable Law and may, prior to the date of its Stockholders' Meeting,
withdraw, modify, or change any such recommendation to the extent that the Board
of Directors of Viacom determines in good faith that such withdrawal,
modification or change is required in order to comply with its fiduciary duties
to Viacom's stockholders under applicable Law after receiving advice from
independent legal counsel (who may be Viacom's regularly engaged outside legal
counsel).

                  (ii) The Proxy Statement shall include the recommendation of
the Board of Directors of CBS to the shareholders of CBS in favor of adoption of
this Agreement; provided, however, that the Board of Directors of CBS may take
or disclose to its shareholders a position contemplated by Rule 14e-2(a)
promulgated under the Exchange Act or make any disclosure required under
applicable Law and may, prior to the date of its Stockholders' Meeting,
withdraw, modify, or change any such recommendation to the extent that the Board
of Directors of CBS determines in good faith that such withdrawal, modification
or change is required in order to comply with its fiduciary duties under
applicable Law after receiving advice from independent legal counsel (who may be
CBS's regularly engaged outside legal counsel).

                  (c) Notwithstanding any withdrawal, modification or change in
any approval or recommendation of the Board of Directors of CBS or Viacom, as
the case may be, each of CBS and Viacom agree to hold their respective
Stockholders Meeting in accordance with the time period specified in Section
6.02.

                  (d) No amendment or supplement to the Proxy Statement or the
Registration Statement will be made by Viacom or CBS without the approval of the
other party, which shall not be unreasonably withheld or delayed. Each of Viacom
and CBS will advise the other, promptly after it receives notice thereof, of the
time when the Registration Statement has become effective or any supplement or
amendment has been filed, the issuance of any stop order, the suspension of the
qualification of the Viacom Class B Common Stock issuable in connection with the
Merger for offering or sale in any jurisdiction, or any request by the SEC for
amendment of the Proxy Statement or the Registration Statement or comments
thereon and responses thereto or requests by the SEC for additional information.

                  (e) The information supplied by CBS for inclusion in the
Registration Statement and the Proxy Statement (including by incorporation by
reference) shall not, at (i) the time the Registration Statement is declared
effective, (ii) the time the Proxy Statement (or any
<PAGE>

                                       37

amendment thereof or supplement thereto) is first mailed to the stockholders and
shareholders of Viacom and CBS, respectively, (iii) the time of each of the
Stockholders' Meetings (as hereinafter defined), and (iv) the Effective Time,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein not misleading. If at any time prior to the Effective Time any event or
circumstance relating to CBS or any of its subsidiaries, or their respective
officers or directors, should be discovered by CBS which, pursuant to the
Securities Act or Exchange Act, should be set forth in an amendment or a
supplement to the Registration Statement or Proxy Statement, CBS shall promptly
inform Viacom. All documents that CBS is responsible for filing with the SEC in
connection with the Merger will comply as to form in all material respects with
the applicable requirements of the Securities Act and the Exchange Act.

                  (f) The information supplied by Viacom for inclusion in the
Registration Statement and the Proxy Statement (including by incorporation by
reference) shall not, at (i) the time the Registration Statement is declared
effective, (ii) the time the Proxy Statement (or any amendment thereof or
supplement thereto) is first mailed to the stockholders of Viacom and the
shareholders of CBS, (iii) the time of each of the Stockholders' Meetings, and
(iv) the Effective Time, contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary in order
to make the statements therein not misleading. If at any time prior to the
Effective Time any event or circumstance relating to Viacom or any of its
subsidiaries, or their respective officers or directors, should be discovered by
Viacom which, pursuant to the Securities Act or Exchange Act, should be set
forth in an amendment or a supplement to the Registration Statement or Proxy
Statement, Viacom shall promptly inform CBS. All documents that Viacom is
responsible for filing with the SEC in connection with the Merger will comply as
to form in all material respects with the applicable requirements of the
Securities Act and the Exchange Act.

                  (g) Viacom and CBS each hereby (i) consents to the use of its
name and, on behalf of its subsidiaries and affiliates, the names of such
subsidiaries and affiliates and to the inclusion of financial statements and
business information relating to such party and its subsidiaries and affiliates
(in each case, to the extent required by applicable securities laws) in any
registration statement or proxy statement prepared by Viacom, CBS or any person
or entity with which Viacom or CBS, consistent with their obligations under this
Agreement, has entered into, or may prior to the Effective Time enter into, a
definitive acquisition agreement, (ii) agrees to use its reasonable best efforts
to obtain the written consent of any person or entity retained by it which may
be required to be named (as an expert or otherwise) in such registration
statement or proxy statement; provided, that such party shall not be required to
make any material payment to such person or entity in connection with such
party's efforts to obtain any such consent, and (iii) agrees to cooperate, and
agrees to use its reasonable best efforts to cause its subsidiaries and
affiliates to cooperate, with any legal counsel, investment banker, accountant
or other agent or representative retained by any of the parties specified in
clause (i) in connection with the preparation of any and all information
required, as determined after consultation with each party's
<PAGE>

                                       38

counsel, to be disclosed by applicable securities laws in any such registration
statement or proxy statement.

                  (h) CBS and Viacom will use their best efforts to complete the
pro forma financial statements with respect to the Merger, in a form suitable
for filing in connection with a registration statement under the Securities Act,
as soon as possible, and in any event within 10 days after the execution of this
Agreement.

                  (i) CBS shall consult with Viacom, and provide Viacom
reasonable opportunity to review and comment on, and CBS and Viacom will use
their respective reasonable best efforts to agree on, CBS's and Infinity's
accounting for the Pending Transactions.

                  SECTION 6.02. Stockholders' Meetings. Each of Viacom and CBS
shall call and hold a meeting of its stockholders or shareholders, respectively
(collectively, the "Stockholders' Meetings"), as promptly as practicable for the
purpose of voting upon, in the case of Viacom, the Viacom Proposals, and, in the
case of CBS, the adoption of this Agreement, and CBS and Viacom shall hold the
Stockholders' Meeting as soon as practicable after the date on which the
Registration Statement becomes effective and will use reasonable best efforts to
hold the Stockholders' Meetings on the same day. Each of Viacom and CBS shall
use its reasonable best efforts to solicit from its stockholders proxies in
favor of the adoption of this Agreement, in the case of CBS, and the Viacom
Proposals, in the case of Viacom, and shall take all other action necessary or
advisable to secure the vote of its stockholders and shareholders, respectively,
required by the NYSE, Pennsylvania Law or Delaware Law, as applicable, to obtain
such approvals; provided, however, that Viacom or CBS, as applicable, shall not
be obligated to solicit proxies in favor of the adoption of this Agreement, in
the case of CBS, or in favor of the Viacom Proposals, in the case of Viacom, at
its Stockholders' Meeting to the extent that the Board of Directors of Viacom or
CBS, as applicable, determines in good faith that such failure to solicit
proxies is required in order to comply with its fiduciary duties under
applicable Law after receiving advice to such effect from independent legal
counsel (who may be such party's regularly engaged outside legal counsel);
provided, further, however, that notwithstanding anything to the contrary in the
foregoing, each of CBS and Viacom shall hold its Stockholders Meeting in
accordance with the time periods specified in the first sentence of this Section
6.02.

                  SECTION 6.03. Appropriate Action; Consents; Filings. (a) Each
of the parties hereto shall (i) make promptly its respective filings, and
thereafter make any other required submissions under the HSR Act with respect to
the transactions contemplated herein and (ii) make promptly filings with or
applications to the FCC with respect to the transactions contemplated herein.
The parties hereto will use their respective best efforts, and will take all
actions necessary, to consummate and make effective the transactions
contemplated herein and to cause the conditions to the Merger set forth in
Article VII to be satisfied, (including using best efforts, and taking all
actions necessary, to obtain all licenses, permits, consents, approvals,
authorizations, waivers, qualifications and orders of Governmental Authorities
as are necessary
<PAGE>

                                       39

for the consummation of the transactions contemplated herein),
and will do so in a manner designed to obtain such regulatory clearance and the
satisfaction of such conditions as expeditiously as possible.

                  (b) CBS and Viacom each agree to take promptly any and all
steps necessary to avoid or eliminate each and every impediment and obtain all
consents or waivers under any antitrust, competition or communications or
broadcast Law that may be asserted by any U.S. federal, state and local and
non-United States antitrust or competition authority, or by the FCC or
similar authority, so as to enable the parties to close the transactions
contemplated by this Agreement as expeditiously as possible, including
committing to or effecting, by consent decree, hold separate orders, trust, or
otherwise, the sale or disposition of such of its assets or businesses as are
required to be divested in order to obtain the consent of the FCC to or avoid
the entry of, or to effect the dissolution of, any decree, order, judgment,
injunction, temporary restraining order or other order in any suit or
proceeding, that would otherwise have the effect of preventing or materially
delaying the consummation of the Merger and the other transactions contemplated
by this Agreement. In addition, each of CBS and Viacom agree to take promptly
any and all steps necessary to obtain any consent or to vacate or lift any
order, writ, judgment, injunction, decree, stipulation, determination or award
entered by or with any Governmental Authority (each, an "Order") relating to
antitrust or communications or broadcast matters that would have the effect of
making any of the transactions contemplated by this Agreement illegal or
otherwise prohibiting or materially delaying their consummation. The parties
will expeditiously agree on a complete plan for compliance with applicable FCC
ownership requirements for inclusion in the FCC filings and will expeditiously
make such filings (including such agreed plan) with the FCC following the date
of this Agreement.

                  (c) Each of Viacom and CBS shall give (or shall cause its
respective subsidiaries to give) any notices to third parties, and Viacom and
CBS shall use, and cause each of its subsidiaries to use, its reasonable best
efforts to obtain any third party consents, necessary, proper or advisable to
consummate the Merger. Each of the parties hereto will furnish to the other such
necessary information and reasonable assistance as the other may request in
connection with the preparation of any required governmental filings or
submissions and will cooperate in responding to any inquiry from a Governmental
Authority, including immediately informing the other party of such inquiry,
consulting in advance before making any presentations or submissions to a
Governmental Authority, and supplying each other with copies of all material
correspondence, filings or communications between either party and any
Governmental Authority with respect to this Agreement.

                  SECTION 6.04. Access to Information; Confidentiality. (a) From
the date hereof to the Effective Time, to the extent permitted by applicable Law
and contracts, Viacom will provide to CBS (and its officers, directors,
employees, accountants, consultants, legal counsel, agents and other
representatives, collectively, "Representatives") access to all
<PAGE>

                                       40

information and documents which CBS may reasonably request regarding the
business, assets, liabilities, employees and other aspects of Viacom.

                  (b) From the date hereof to the Effective Time, to the extent
permitted by applicable Law and contracts, CBS will provide to Viacom and its
Representatives access to all information and documents which Viacom may
reasonably request regarding the business, assets, liabilities, employees and
other aspects of CBS.

                  (c) The parties shall comply with, and shall cause their
respective Representatives to comply with all of their respective obligations
under the Confidentiality Agreement dated August 27, 1999 (the "Confidentiality
Agreement") between CBS and Viacom.

                  (d) No investigation pursuant to this Section 6.04 shall
affect any representation or warranty in this Agreement of any party hereto or
any condition to the obligations of the parties hereto.

                  SECTION 6.05. No Solicitation of Competing Transactions. (a)
CBS shall not, directly or indirectly, through any officer, director, agent or
otherwise, initiate, solicit or knowingly encourage (including by way of
furnishing non-public information), or take any other action knowingly to
facilitate, any inquiries or the making of any proposal that constitutes, or may
reasonably be expected to lead to, any Competing Transaction (as defined below),
or enter into or maintain or continue discussions or negotiate with any person
or entity in furtherance of such inquiries or to obtain a Competing Transaction,
or agree to or endorse any Competing Transaction, or authorize any of the
officers, directors or employees of CBS or any investment banker, financial
advisor, attorney, accountant or other agent or representative of CBS to take
any such action, and CBS shall notify Viacom as promptly as practicable of all
of the relevant material details relating to all inquiries and proposals which
CBS or any such officer, director, employee, investment banker, financial
advisor, attorney, accountant or other agent or representative may receive
relating to any of such matters, provided, however, that prior to the adoption
of this Agreement by the shareholders of CBS, nothing contained in this Section
6.05 shall prohibit the Board of Directors of CBS from (i) furnishing
information to, or entering into and engaging in discussions or negotiations
with, any person that makes a bona fide unsolicited written proposal that the
Board of Directors of CBS determines in good faith, after consultation with
CBS's financial advisors and independent legal counsel, can be reasonably
expected to result in a CBS Superior Proposal; provided, that prior to
furnishing such information to, or entering into discussions or negotiations
with, such person, CBS (1) provides notice to Viacom to the effect that it is
furnishing information to, or entering into discussions or negotiations with,
such person and provides in any such notice to Viacom in reasonable detail the
identity of the person making such proposal and the material terms and
conditions of such proposal, (2) provides Viacom with all information regarding
CBS provided or to be provided to such person which Viacom has not previously
been provided, and provided, further that CBS shall keep Viacom informed, on a
prompt basis, of the status and material terms of any such proposal and
<PAGE>

                                       41

the status of any such discussions and negotiations and (3) receives from such
person or entity an executed confidentiality agreement containing customary
terms (which need not contain "standstill" or similar provisions), (ii)
complying with Rule 14e-2 promulgated under the Exchange Act with regard to a
tender or exchange offer or making any disclosure required under applicable Law
or (iii) failing to make or withdrawing or modifying its recommendation referred
to in Section 6.01 following the making of a CBS Superior Proposal if, solely in
the case of this clause (iii), the Board of Directors of CBS, after consultation
with and based upon the advice of independent legal counsel, determines in good
faith that such action is necessary for the Board of Directors of CBS to comply
with its fiduciary duties under applicable law.

                  (b) For purposes of this Agreement, "Competing Transaction"
shall mean any of the following involving CBS: (i) any merger, consolidation,
share exchange, business combination, issuance or purchase of securities or
other similar transaction other than transactions specifically permitted
pursuant to Section 5.01 of this Agreement; (ii) any sale, lease, exchange,
mortgage, pledge, transfer or other disposition of the assets of CBS in a single
transaction or series of related transactions; (iii) any tender offer or
exchange offer for CBS securities or the filing of a registration statement
under the Securities Act in connection with any such exchange offer; in the case
of clauses (i), (ii) or (iii) above, which transaction would result in a third
party (or its shareholders) acquiring more than 35% of the voting power of the
Shares then outstanding or more than 35% of the assets of CBS and its
subsidiaries, taken as a whole; or (iv) any public announcement of an agreement,
proposal, plan or intention to do any of the foregoing, either during the
effectiveness of this Agreement or at any time thereafter.

                  (c) For purposes of this Agreement, a "CBS Superior Proposal"
means any proposal made by a third party which would result in such party (or in
the case of a parent-to- parent merger, its stockholders) acquiring, directly or
indirectly, including pursuant to a tender offer, exchange offer, merger,
consolidation, share exchange, business combination, share purchase, asset
purchase, recapitalization, liquidation, dissolution, joint venture or similar
transaction, more than 50% of the voting power of the Shares then outstanding or
all or substantially all the assets of CBS and its subsidiaries, taken as a
whole, for consideration which the Board of Directors of CBS determines in its
good faith judgment to be more favorable to CBS's shareholders than the Merger.

                  SECTION 6.06. Directors' and Officers' Indemnification and
Insurance. (a) The Certificate of Incorporation and By-Laws of the Surviving
Corporation shall contain the provisions with respect to indemnification set
forth in the Certificate of Incorporation and By-laws of Viacom on the date of
this Agreement, which provisions shall not be amended, repealed or otherwise
modified after the Effective Time in any manner that would adversely affect the
rights thereunder of individuals who at any time prior to the Effective Time
were directors or officers of CBS in respect of actions or omissions occurring
at or prior to the Effective Time (including, without limitation, the
transactions contemplated by this Agreement), unless such modification is
required by law.
<PAGE>

                                       42

                  (b) The Surviving Corporation shall maintain in effect for six
years from the Effective Time directors' and officers' liability insurance
covering those persons who are currently covered by CBS's directors' and
officers' liability insurance policy on terms comparable to such existing
insurance coverage; provided, however, that in no event shall the Surviving
Corporation be required to expend pursuant to this Section 6.06 more than an
amount per year equal to 300% of current annual premiums paid by CBS for such
insurance and; provided, further that if the annual premiums exceed such amount,
Viacom shall be obligated to obtain a policy with the greatest coverage
available for an annual cost not exceeding such amount.

                  (c) This Section 6.06 shall survive the consummation of the
Merger, is intended to benefit each indemnified party, shall be binding, jointly
and severally, on all successors and assigns of the Surviving Corporation, and
shall be enforceable by the indemnified parties and their successors.

                  SECTION 6.07. Notification of Certain Matters. CBS shall give
prompt notice to Viacom, and Viacom shall give prompt notice to CBS, of (i) the
occurrence, or nonoccurrence, of any event the occurrence, or nonoccurrence, of
which would be likely to cause (x) any representation or warranty contained in
this Agreement to be untrue or inaccurate or (y) any covenant, condition or
agreement contained in this Agreement not to be complied with or satisfied and
(ii) any failure of CBS or Viacom, as the case may be, to comply with or satisfy
any covenant, condition or agreement to be complied with or satisfied by it
hereunder; provided, however, that the delivery of any notice pursuant to this
Section 6.07 shall not limit or otherwise affect the remedies available
hereunder to the party receiving such notice.

                  SECTION 6.08. Tax Treatment. (a) The Agreement is intended to
constitute a "plan of reorganization" within the meaning of Section 1.368-2(g)
of the income tax regulations promulgated under the Code.

                  (b) Between the date of this Agreement and the Effective Time,
neither CBS nor Viacom nor their affiliates shall directly or indirectly take
any action that could prevent the Merger from qualifying as a reorganization
under Section 368(a) of the Code, that could prevent each of them from providing
representations required from them in Sections 7.02(c) or 7.03(c), or that could
prevent the opinions described in such Sections from being provided. Each of
them shall use all reasonable efforts to cause the opinions described in such
Sections to be provided, and to cause similar opinions to be provided at the
date of filing of the Registration Statement.

                  (c) Neither CBS nor Viacom shall (without the consent of the
other) take any action, except as specifically contemplated by this Agreement,
that could adversely affect the intended tax treatment of the Pending
Transactions.

                  SECTION 6.09. Stock Exchange Listing. Viacom shall as promptly
as reasonably practicable prepare and submit to NYSE a listing application
covering the shares of
<PAGE>

                                       43

Viacom Class B Common Stock to be issued in the Merger and the shares of Viacom
Class B Common Stock underlying the CBS Options outstanding immediately prior to
the Effective Time and shall use its best efforts to cause such shares to be
approved for listing on the NYSE prior to the Effective Time.

                  SECTION 6.10. Public Announcements. Viacom and CBS shall
consult with each other before issuing any press release or otherwise making any
public statements with respect to this Agreement and shall not issue any such
press release or make any such public statement without the prior consent of the
other (which consent shall not be unreasonably withheld or delayed), except as
may be required by Law or any listing agreement with the NYSE to which Viacom or
CBS is a party. The parties have agreed on the text of a joint press release by
which Viacom and CBS will announce the execution of this Agreement.

                  SECTION 6.11. Viacom's Directors. The Board of Directors of
Viacom shall take all such action as may be necessary to cause the number of
directors on the Board of Directors of Viacom to be increased to eighteen as of
the Effective Time and to cause to be appointed to the Board of Directors of
Viacom as of the Effective Time eight designees of CBS, one of whom shall be Mel
Karmazin (unless Mel Karmazin shall no longer be available to serve in such
capacity) and the other seven of whom shall consist of CBS directors designated
in writing by CBS to Viacom prior to the mailing of the Proxy Statement as set
forth in Exhibit A-1 hereto.

                  SECTION 6.12. Rights Agreement. The Board of Directors of CBS
shall take such action as is necessary to render the Rights inapplicable to the
Merger and the other transactions contemplated by this Agreement.

                  SECTION 6.13. Assumption of Debt and Leases. (a) With respect
to debt issued by CBS under indentures qualified under the Trust Indenture Act
of 1939, and any other debt of CBS the terms of which require Viacom to assume
such debt in order to avoid default thereunder (collectively, the "CBS
Indentures"), Viacom shall execute and deliver to the trustees or other
representatives in accordance with the terms of the respective CBS Indentures,
Supplemental Indentures, in form satisfactory to the respective trustees or
other representatives, expressly assuming the obligations of CBS with respect to
the due and punctual payment of the principal of (and premium, if any) and
interest, if any, on all debt securities issued by CBS under the respective
Indentures and the due and punctual performance of all the terms, covenants and
conditions of the respective CBS Indentures to be kept or performed by CBS and
shall deliver such Supplemental Indentures to the respective trustees or other
representatives under the CBS Indentures.

                  (b) Viacom shall, promptly upon the reasonable request of CBS,
provide CBS with a letter which states that Viacom agrees that, as the Surviving
Corporation in the Merger, as
<PAGE>

                                       44

of and following the Effective Time, it will succeed to, honor, and satisfy all
obligations and liabilities of CBS.

                  SECTION 6.14. Affiliates of CBS. CBS represents and warrants
to Viacom that prior to the date of the CBS Stockholders' Meeting CBS will
deliver to Viacom a letter identifying all persons who may be deemed affiliates
of CBS under Rule 145 of the Securities Act, including, without limitation, all
directors and executive officers of CBS, and CBS represents and warrants to
Viacom that CBS has advised the persons identified in such letter of the resale
restrictions imposed by applicable securities laws. CBS shall use its reasonable
best efforts to obtain from each person identified in such letter a written
agreement, substantially in the form of Exhibit 6.14. CBS shall use its
reasonable best efforts to obtain as soon as practicable from any person who may
be deemed to have become an affiliate of CBS after CBS's delivery of the letter
referred to above and prior to the Effective Time, a written agreement
substantially in the form of Exhibit 6.14.

                  SECTION 6.15. Prior Service. With respect to any medical and
dental benefits provided to Continuing Employees as of or following the
Effective Time under Viacom's benefit plans, Viacom agrees that it will waive
waiting periods and pre-existing condition requirements under such plans (to the
extent waived under CBS's plans), and will give Continuing Employees credit for
any co-payments and deductibles actually paid by such employees under CBS's
medical and dental plans during the calendar year in which the Effective Time
occurs. In addition, service with CBS shall be recognized for all purposes under
Viacom's compensation and benefit plans, programs, policies and arrangements,
except where crediting such service would result in a duplication of benefits.
Without limiting the generality of the foregoing, Viacom shall honor all
vacation, personal and sick days accrued by Continuing Employees under CBS's
plans, policies, programs and arrangements immediately prior to the Effective
Time.

                  SECTION 6.16. Employee Matters. (a) Viacom may establish
retention and severance arrangements for its officers or employees consistent
with the terms and conditions set forth in Section 6.16 of the Viacom Disclosure
Schedule (the "Viacom Employee Arrangements").

                  (b) CBS may establish retention and severance and similar
compensation arrangements for its officers and employees; provided that the
aggregate amount expended pursuant to such arrangements does not materially
exceed the estimated value of the Viacom Employee Arrangements.

                  (c) Each of CBS and Viacom shall consult with the other on the
design and implementation of the retention arrangements and the allocations of
the payments thereunder.
<PAGE>

                                       45

                                   ARTICLE VII

                            CONDITIONS TO THE MERGER

                  SECTION 7.01. Conditions to the Obligations of Each Party. The
obligations of CBS and Viacom to consummate the Merger are subject to the
satisfaction or waiver of the following conditions:

                  (a) (i) this Agreement shall have been adopted by the
         affirmative vote of a majority of the votes cast by all shareholders
         entitled to vote at the CBS Stockholders' Meeting in accordance with
         Pennsylvania Law and CBS's Articles of Incorporation and (ii) the
         Viacom Proposals shall have been approved by the affirmative vote of
         the holders of a majority of the Viacom Class A Common Stock;

                  (b) any applicable waiting period under the HSR Act relating
         to the Merger shall have expired or been terminated;

                  (c) no Governmental Authority or court of competent
         jurisdiction shall have enacted, issued, promulgated, enforced or
         entered any Law, rule, regulation, executive order or Order which is
         then in effect and has the effect of making the Merger illegal or
         otherwise prohibiting consummation of the Merger;

                  (d) the Registration Statement shall have been declared
         effective, and no stop order suspending the effectiveness of the
         Registration Statement shall be in effect and no proceedings for such
         purpose shall be pending before or threatened by the SEC;

                  (e) (i) all authorizations, consents, waivers, orders or
         approvals for the Merger required to be obtained and all conditions
         precedent to such authorizations, consents, waivers, orders or
         approvals shall have been satisfied, and all filings, notices or
         declarations required to be made, by Viacom and CBS prior to the
         consummation of the Merger and the transactions contemplated hereunder,
         shall have been obtained from, and made with, the FCC and competition
         and antitrust Governmental Authorities in Canada and either the
         European Union or the United Kingdom, as applicable, and (ii) all other
         authorizations, consents, waivers, orders or approvals for the Merger
         required to be obtained, and all other filings, notices or declarations
         required to be made, by Viacom and CBS prior to the consummation of the
         Merger and the transactions contemplated hereunder, shall have been
         obtained from, and made with, all required Governmental Entities,
         except for such authorizations, consents, waivers, orders, approvals,
         filings, notices or declarations the failure to obtain or make which
         would not have a material adverse effect, at or after the Effective
         Time, on the business, results of operations or financial condition of
         CBS and its subsidiaries and Viacom and its subsidiaries, collectively
         taken as a whole; and
<PAGE>

                                       46

                  (f) the shares of Viacom Class B Common Stock issuable to
         CBS's shareholders in the Merger and to holders of CBS Options
         outstanding immediately prior to the Effective Time shall have been
         authorized for listing on the NYSE, subject to official notice of
         issuance.

                  SECTION 7.02. Conditions to the Obligations of Viacom. The
obligations of Viacom to consummate the Merger are subject to the satisfaction
or waiver of the following further conditions:

                  (a) each of the representations and warranties of CBS
         contained in this Agreement shall be true and correct as of the
         Effective Time as though made on and as of the Effective Time (except
         to the extent expressly made as of an earlier date, in which case as of
         such date), except where the failure to be so true and correct would
         not have, individually or in the aggregate, a CBS Material Adverse
         Effect, and Viacom shall have received a certificate of an officer of
         CBS to such effect;

                  (b) CBS shall have performed or complied in all material
         respects with all material agreements and covenants required by this
         Agreement to be performed or complied with by it on or prior to the
         Effective Time, and Viacom shall have received a certificate of an
         officer of CBS to that effect; and

                  (c) Viacom shall have received the opinion of Paul, Weiss,
         Rifkind, Wharton & Garrison, in form and substance reasonably
         satisfactory to Viacom, to the effect that the Merger will be treated
         for federal income tax purposes as a reorganization qualifying under
         the provisions of section 368(a) of the Code, and Viacom and CBS will
         each be a party to the reorganization within the meaning of Section
         368(b) of the Code. In rendering such opinion, counsel may require and
         rely upon representations contained in certificates of officers of CBS
         and Viacom.

                  SECTION 7.03. Conditions to the Obligations of CBS. The
obligations of CBS to consummate the Merger are subject to the satisfaction or
waiver of the following further conditions:

                  (a) each of the representations and warranties of Viacom
         contained in this Agreement shall be true and correct as of the
         Effective Time as though made on and as of the Effective Time (except
         to the extent expressly made as of an earlier date, in which case as of
         such date), except where failure to be so true and correct would not
         have, individually or in the aggregate, a Viacom Material Adverse
         Effect, and CBS shall have received a certificate of an officer of
         Viacom to such effect;

                  (b) Viacom shall have performed or complied in all material
         respects with all material agreements and covenants required by this
         Agreement to be performed or
<PAGE>

                                       47

         complied with by it on or prior to the Effective Time, and CBS shall
         have received a certificate of an officer of Viacom to that effect; and

                  (c) CBS shall have received the opinion of Cravath, Swaine &
         Moore, in form and substance reasonably satisfactory to CBS, to the
         effect that the Merger will be treated for federal income tax purposes
         as a reorganization qualifying under the provisions of section 368(a)
         of the Code, and Viacom and CBS will each be a party to such
         reorganization within the meaning of Section 368(b) of the Code. In
         rendering such opinion, counsel may require and rely upon
         representations contained in certificates of officers of Viacom and
         CBS.


                                  ARTICLE VIII

                        TERMINATION, AMENDMENT AND WAIVER

                  SECTION 8.01. Termination. This Agreement may be terminated
and the Merger may be abandoned at any time prior to the Effective Time,
notwithstanding any requisite approval and adoption of this Agreement, as
follows:

                  (a) by mutual written consent duly authorized by the Boards of
         Directors of each of Viacom and CBS;

                  (b) by either Viacom or CBS, if the Effective Time shall not
         have occurred on or before August 31, 2000; provided, however, that the
         right to terminate this Agreement under this Section 8.01(b) shall not
         be available to any party whose failure to fulfill any obligation under
         this Agreement has been the cause of, or resulted in, the failure of
         the Effective Time to occur by such time;

                  (c) by CBS upon delivery to Viacom of written notice that a
         Competing Proposal constitutes a CBS Superior Proposal; provided,
         however, that such termination pursuant to this subsection (c) shall
         not be effective until two business days have elapsed following
         delivery to Viacom of such written notice (which written notice will
         inform Viacom of the material terms and conditions of the CBS Superior
         Proposal); provided, further, however, that such termination under this
         subsection (c) shall not be effective until CBS has made payment to
         Viacom of the amounts required to be paid pursuant to Section 8.05;

                  (d) by either CBS or Viacom, if this Agreement shall fail to
         receive the requisite vote for adoption at the CBS Stockholders'
         Meeting;
<PAGE>

                                       48

                  (e) by CBS, upon a breach of any representation, warranty,
         covenant or agreement on the part of Viacom set forth in this
         Agreement, or if any representation or warranty of Viacom shall have
         become untrue, in either case such that the conditions set forth in
         Section 7.03(a) or (b) are not capable of being satisfied on or before
         August 31, 2000 (a "Terminating Viacom Breach");

                  (f) by Viacom, upon breach of any representation, warranty,
         covenant or agreement on the part of CBS set forth in this Agreement,
         or if any representation or warranty of CBS shall have become untrue,
         in either case such that the conditions set forth in Sections 7.02(a)
         or (b) are not capable of being satisfied on or before August 31, 2000
         ("Terminating CBS Breach"); or

                  (g) by either Viacom or CBS, if any Governmental Authority
         shall have issued an Order or taken any other action permanently
         restraining, enjoining or otherwise prohibiting the transactions
         contemplated by this Agreement, and such Order or other action shall
         have become final and nonappealable.

                  SECTION 8.02. Effect of Termination. Subject to Section 8.05
hereof, in the event of termination of this Agreement pursuant to Section 8.01,
this Agreement shall forthwith become void, there shall be no liability under
this Agreement on the part of Viacom or CBS or any of their respective officers
or directors and all rights and obligations of each party hereto shall cease;
provided, however, that nothing herein shall relieve any party from liability
for the willful breach of any of its representations, warranties, covenants or
agreements set forth in this Agreement.

                  SECTION 8.03. Amendment. This Agreement may be amended by the
parties hereto by action taken by or on behalf of their respective Boards of
Directors at any time prior to the Effective Time; provided, however, that,
after the approval and adoption of this Agreement by either the stockholders of
Viacom or shareholders of CBS, there shall not be any amendment that by Law
requires further approval by the stockholders of Viacom or shareholders of CBS
without the further approval of such stockholders or such shareholders. This
Agreement may not be amended except by an instrument in writing signed by the
parties hereto.

                  SECTION 8.04. Waiver. At any time prior to the Effective Time,
any party hereto may (a) extend the time for the performance of any obligation
or other act of any other party hereto, (b) waive any inaccuracy in the
representations and warranties contained herein or in any document delivered
pursuant hereto and (c) subject to the proviso of Section 8.03, waive compliance
with any agreement or condition contained herein. Any such extension or waiver
shall be valid if set forth in an instrument in writing signed by the party or
parties to be bound thereby.
<PAGE>

                                       49

                  SECTION 8.05. Expenses. (a) Except as set forth in this
Section 8.05, all Expenses (as defined below) incurred in connection with this
Agreement and the transactions contemplated by this Agreement shall be paid by
the party incurring such expenses, whether or not the Merger or any other
transaction is consummated, except that CBS and Viacom each shall pay one-half
of all Expenses relating to (i) printing, filing and mailing the Registration
Statement and the Proxy Statement and all SEC and other regulatory filing fees
incurred in connection with the Registration Statement and the Proxy Statement,
(ii) any filing with the FCC or similar authority and (iii) any filing with
antitrust authorities. "Expenses" as used in this Agreement shall include all
reasonable out-of-pocket expenses (including all fees and expenses of counsel,
accountants, investment bankers, experts and consultants to a party hereto and
its affiliates) incurred by a party or on its behalf in connection with or
related to the authorization, preparation, negotiation, execution and
performance of this Agreement, the preparation, printing, filing and mailing of
the Registration Statement and the Proxy Statement, the solicitation of
stockholder and shareholder approvals, the filing of any required notices under
the HSR Act or other similar regulations and all other matters related to the
closing of the Merger and the other transactions contemplated by this Agreement.

                  (b) CBS agrees that:

                      (i) if CBS shall terminate this Agreement pursuant to
         Section 8.01(c); or

                      (ii) if (A) Viacom or CBS shall terminate this Agreement
         pursuant to Section 8.01(d) due to the failure of CBS's shareholders to
         approve this Agreement, (B) at or prior to the time of such failure to
         so approve this Agreement a Competing Transaction with respect to CBS
         shall have been made public and (C) within twelve months after such
         termination (i) a Competing Transaction is consummated or (ii) a
         binding agreement to enter into a Competing Transaction is entered into
         by CBS (solely for purposes of this Section 8.05(b)(ii), the term
         "Competing Transaction" shall have the meaning assigned to such term in
         Section 6.05(b) except that references to "35%" in the definition of
         "Competing Transaction" in Section 6.05(b) shall be deemed to be
         references to 50%),

then CBS shall pay to Viacom an amount equal to $1,000,000,000 (the "CBS
Alternative Transaction Fee").

                  (c) Each of CBS and Viacom agrees that the agreements
contained in Section 8.05(b) are an integral part of the transactions
contemplated by this Agreement.

                  (d) All payments to Viacom under this Section 8.05 shall be
made by wire transfer of immediately available funds to an account designated by
Viacom.
<PAGE>

                                       50

                                   ARTICLE IX

                               GENERAL PROVISIONS

                  SECTION 9.01. Non-Survival of Representations, Warranties and
Agreements. The representations, warranties and agreements in this Agreement and
any certificate delivered pursuant hereto by any person shall terminate at the
Effective Time or upon the termination of this Agreement pursuant to Section
8.01, as the case may be, except that this Section 9.01 shall not limit any
covenant or agreement of the parties which by its terms contemplates performance
after the Effective Time or after termination of this Agreement.

                  SECTION 9.02. Notices. All notices, requests, claims, demands
and other communications hereunder shall be in writing and shall be given or
made (and shall be deemed to have been duly given or made upon receipt) by
delivery in person, by facsimile, by courier service or by registered or
certified mail (postage prepaid, return receipt requested) to the respective
parties at the following addresses (or at such other address for a party as
shall be specified in a notice given in accordance with this Section 9.02):

                  if to Viacom:

                           Viacom Inc.
                           1515 Broadway
                           New York, New York  10036
                           Telecopier: (212) 258-6134
                           Attention:  Senior Vice President,
                                       General Counsel

                  with a copy to:

                           Shearman & Sterling
                           599 Lexington Avenue
                           New York, New York 10022
                           Telecopier No.: (212) 848-7179
                           Attention:  Creighton O'M. Condon, Esq.  and
                                       Stephen R. Volk, Esq.
<PAGE>

                                       51

                  if to CBS:

                           CBS Corporation
                           51 West 52nd Street
                           35th Floor
                           New York, New York  10019
                           Telecopier No.:  (212) 597-4031
                           Attention:  Louis J. Briskman, Esq.
                                       Executive Vice President and
                                       General Counsel

                  with copies to:

                           Cravath, Swaine & Moore
                           825 Eighth Avenue
                           New York, New York  10019
                           Telecopier No.:  (212) 474-3700
                           Attention:  Allen Finkelson, Esq. and
                                       Scott A. Barshay, Esq.

                  SECTION 9.03. Interpretation, Certain Definitions. When a
reference is made in this Agreement to an Article, Section or Exhibit, such
reference shall be to an Article or Section of, or an Exhibit to, this Agreement
unless otherwise indicated. The table of contents and headings for this
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement. Whenever the words "include",
"includes" or "including" are used in this Agreement, they shall be deemed to be
followed by the words "without limitation". The words "hereof", "herein" and
"hereunder" and words of similar import when used in this Agreement shall refer
to this Agreement as a whole and not to any particular provision of this
Agreement. All terms defined in this Agreement shall have the defined meanings
when used in any certificate or other document made or delivered pursuant hereto
unless otherwise defined therein. The definitions contained in this Agreement
are applicable to the singular as well as the plural forms of such terms and to
the masculine as well as to the feminine and neuter genders of such term. Any
statute defined or referred to herein or in any agreement or instrument that is
referred to herein means such statute as from time to time amended, modified or
supplemented, including (in the case of statutes) by succession of comparable
successor statutes. References to a person are also its permitted successors and
assigns.

                  For purposes of this Agreement, the term:
<PAGE>

                                       52

                  (a) "affiliate" of a specified person means a person who
         directly or indirectly through one or more intermediaries controls, is
         controlled by, or is under common control with, such specified person;

                  (b) "beneficial owner" with respect to any shares means a
         person who shall be deemed to be the beneficial owner of such shares
         (i) which such person or any of its affiliates or associates (as such
         term is defined in Rule 12b-2 promulgated under the Exchange Act)
         beneficially owns, directly or indirectly, (ii) which such person or
         any of its affiliates or associates has, directly or indirectly, (A)
         the right to acquire (whether such right is exercisable immediately or
         subject only to the passage of time), pursuant to any agreement,
         arrangement or understanding or upon the exercise of consideration
         rights, exchange rights, warrants or options, or otherwise, or (B) the
         right to vote pursuant to any agreement, arrangement or understanding
         or (iii) which are beneficially owned, directly or indirectly, by any
         other persons with whom such person or any of its affiliates or
         associates or any person with whom such person or any of its affiliates
         or associates has any agreement, arrangement or understanding for the
         purpose of acquiring, holding, voting or disposing of any such shares;

                  (c) "business day" means any day on which the principal
         offices of the SEC in Washington, D.C. are open to accept filings, or,
         in the case of determining a date when any payment is due, any day on
         which banks are not required or authorized to close in the City of New
         York;

                  (d) "control" (including the terms "controlled by" and "under
         common control with") means the possession, directly or indirectly or
         as trustee or executor, of the power to direct or cause the direction
         of the management and policies of a person, whether through the
         ownership of voting securities, as trustee or executor, by contract or
         credit arrangement or otherwise;

                  (e) "Governmental Authority" means any United States (federal,
         state or local) or foreign government, or governmental, regulatory or
         administrative authority, agency or commission;

                  (f) "knowledge" means the actual knowledge of the following
         officers and employees of CBS and Viacom, without benefit of an
         independent investigation of any matter, as to (i) CBS: Mel Karmazin,
         Leslie Moonves, Louis Briskman and Robert Freedline, and (ii) Viacom:
         Sumner Redstone, Philippe Dauman, Thomas Dooley, Michael Fricklas,
         George Smith and Susan Gordon;

                  (g) "person" means an individual, corporation, limited
         liability company, partnership, limited partnership, syndicate, person
         (including, without limitation, a
<PAGE>

                                       53

         "person" as defined in Section 13(d)(3) of the Exchange Act), trust,
         association or entity or government, political subdivision, agency or
         instrumentality of a government; and

                  (h) "subsidiary" or "subsidiaries" of any person means any
         corporation, partnership, joint venture or other legal entity of which
         such person (either above or through or together with any other
         subsidiary), owns, directly or indirectly, more than 50% of the stock
         or other equity interests, the holders of which are generally entitled
         to vote for the election of the board of directors or other governing
         body of such corporation or other legal entity.

                  SECTION 9.04. Severability. If any term or other provision of
this Agreement is invalid, illegal or incapable of being enforced by any rule of
Law, or public policy, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of the Merger is not affected in any manner materially adverse
to any party. Upon such determination that any term or other provision is
invalid, illegal or incapable of being enforced, the parties hereto shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in a mutually acceptable manner in
order that the Merger be consummated as originally contemplated to the fullest
extent possible.

                  SECTION 9.05. Entire Agreement; Assignment. This Agreement
(including the Exhibits, the CBS Disclosure Schedule and the Viacom Disclosure
Schedule which are hereby incorporated herein and made a part hereof for all
purposes as if fully set forth herein), the Parent Voting Agreements and the
Confidentiality Agreement constitutes the entire agreement among the parties
with respect to the subject matter hereof and supersede all prior agreements and
undertakings, both written and oral, among the parties, or any of them, with
respect to the subject matter hereof. The parties agree to comply with all
covenants and agreements set forth on the CBS Disclosure Schedule and the Viacom
Disclosure Schedule as if such covenants and agreements were fully set forth in
this Agreement. This Agreement shall not be assigned by operation of law or
otherwise.

                  SECTION 9.06. Parties in Interest. This Agreement shall be
binding upon and inure solely to the benefit of each party hereto, and nothing
in this Agreement, express or implied, is intended to or shall confer upon any
other person any right, benefit or remedy of any nature whatsoever under or by
reason of this Agreement, other than Article II and Section 6.06 (which are
intended to be for the benefit of the persons covered thereby and may be
enforced by such persons).

                  SECTION 9.07. Specific Performance. The parties hereto agree
that irreparable damage would occur in the event any provision of this Agreement
was not performed in accordance with the terms hereof and that the parties shall
be entitled to specific performance of the terms hereof, in addition to any
other remedy at law or equity.
<PAGE>

                                       54

                  SECTION 9.08. Governing Law. This Agreement shall be governed
by, and construed in accordance with the laws of the State of Delaware, except
for such provisions where Pennsylvania Law is mandatorily applicable, which
provisions shall be governed by and construed in accordance with the laws of the
Commonwealth of Pennsylvania.

                  SECTION 9.09. Consent to Jurisdiction. (a) Each of Viacom and
CBS hereby irrevocably submits to the exclusive jurisdiction of the courts of
the State of Delaware and to the jurisdiction of the United States District
Court for the State of Delaware, for the purpose of any action or proceeding
arising out of or relating to this Agreement and each of Viacom and CBS hereby
irrevocably agrees that all claims in respect to such action or proceeding may
be heard and determined exclusively in any Delaware state or federal court. Each
of Viacom and CBS agrees that a final judgment in any action or proceeding shall
be conclusive and may be enforced in other jurisdictions by suit on the judgment
or in any other manner provided by law.

                  (b) Each of Viacom and CBS irrevocably consents to the service
of the summons and complaint and any other process in any other action or
proceeding relating to the transactions contemplated by this Agreement, on
behalf of itself or its property, by personal delivery of copies of such process
to such party. Nothing in this Section 9.09 shall affect the right of any party
to serve legal process in any other manner permitted by law.

                  SECTION 9.10. Counterparts. This Agreement may be executed and
delivered (including by facsimile transmission) in one or more counterparts, and
by the different parties hereto in separate counterparts, each of which when
executed and delivered shall be deemed to be an original but all of which taken
together shall constitute one and the same agreement.

                  SECTION 9.11. WAIVER OF JURY TRIAL. EACH OF VIACOM AND CBS
HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING
OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR
RELATING TO THIS AGREEMENT OR THE ACTIONS OF VIACOM OR CBS IN THE NEGOTIATION,
ADMINISTRATION, PERFORMANCE AND ENFORCEMENT THEREOF.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]
<PAGE>

                  IN WITNESS WHEREOF, Viacom and CBS have caused this Agreement
to be executed as of the date first written above by their respective officers
thereunto duly authorized.

                                           VIACOM INC.


                                           By:  /s/ Sumner M. Redstone
                                                ------------------------------
                                                Name:
                                                Title:


                                           CBS CORPORATION


                                           By:  /s/ Fredric Reynolds
                                                ------------------------------
                                                Name:
                                                Title:











































































                    Exhibit A-1 to the Merger Agreement is
                       attached as Annex B to the Joint
                          Proxy Statement/Prospectus






























































































                    Exhibit A-2 to the Merger Agreement is
                          attached as Annex C to the
                       Joint Proxy Statement/Prospectus
<PAGE>

                                                                 EXHIBIT 6.14 TO
                                                            THE MERGER AGREEMENT


                            FORM OF AFFILIATE LETTER


Viacom Inc.
1515 Broadway
New York, New York 10036


Ladies and Gentlemen:

                   I have been advised that as of the date of this letter I may
be deemed to be an "affiliate" of CBS Corporation, a Pennsylvania corporation
(the "Company"), as the term "affiliate" is defined for purposes of paragraphs
(c) and (d) of Rule 145 of the rules and regulations (the "Rules and
Regulations") of the Securities and Exchange Commission (the "Commission") under
the Securities Act of 1933, as amended (the "Act"). Pursuant to the terms of the
Agreement and Plan of Merger dated as of September , 1999 (the "Agreement"),
between Viacom Inc., a Delaware corporation ("Viacom"), and the Company, the
Company will be merged with and into Viacom (the "Merger").

                   As a result of the Merger, I may receive (i) shares of Class
B common stock, par value $.01 per share, of Viacom (the "Viacom Class B Common
Stock"), or (ii) an option (a "Substituted Option") to purchase a number of
shares of Viacom Class B Common Stock (the Viacom Class B Common Stock and the
Substituted Options collectively referred to as the "Viacom Securities"). In
respect of shares of Viacom Class B Common Stock, I would receive such shares in
exchange for shares owned by me of common stock, par value $1.00 per share, of
the Company (the "Company Common Stock"). In respect of the Substituted Options,
I would receive such options in exchange for options to purchase Company Common
Stock held by me under the CBS Stock Option Plans (as defined in the Agreement).

                   I represent, warrant and covenant to Viacom that in the event
I receive any Viacom Securities as a result of the merger:

                   A. I shall not make any sale, transfer or other disposition
          of the Viacom Securities in violation of the Act or the Rules and
          Regulations.

                   B. I have carefully read this letter and the Agreement and
          discussed the requirements of such documents and other applicable
          limitations upon my ability to sell, transfer or otherwise dispose of
          Viacom Securities to the extent I felt necessary, with my counsel or
          counsel for the Company.

                   C. I have been advised that the issuance of Viacom Securities
          to me pursuant to the Merger has been registered with the Commission
          under the Act on a Registration
<PAGE>

                                        2

          Statement Form S-4. However, I have also been advised that, because at
          the time the Merger is submitted for a vote of the stockholders of the
          Company, (a) I may be deemed to be an affiliate of the Company and (b)
          the distribution by me of the Viacom Securities has not been
          registered under the Act, I may not sell, transfer or otherwise
          dispose of Viacom Securities issued to me in the Merger unless (i)
          such sale, transfer or other disposition is made in conformity with
          the volume and other limitations of Rule 145 promulgated by the
          Commission under the Act, (ii) such sale, transfer or other
          disposition has been registered under the Act or (iii) in the opinion
          of counsel reasonably acceptable to Viacom, such sale, transfer or
          other disposition is otherwise exempt from registration under the Act.

                   D. I understand that Viacom is under no obligation to
          register the sale, transfer or other disposition of the Viacom
          Securities by me or on my behalf under the Act or to take any other
          action necessary in order to make compliance with an exemption from
          such registration available solely as a result of the Merger.

                   E. I also understand that there will be placed on the
          certificates for the Viacom Securities issued to me, or any
          substitutions therefor, a legend stating in substance:

                   "THE [SHARES] [OPTIONS] REPRESENTED BY THIS CERTIFICATE WERE
                   ISSUED IN A TRANSACTION TO WHICH RULE 145 PROMULGATED UNDER
                   THE SECURITIES ACT OF 1933 APPLIES. THE [SHARES] [OPTIONS]
                   REPRESENTED BY THIS CERTIFICATE MAY ONLY BE TRANSFERRED IN
                   ACCORDANCE WITH THE TERMS OF AN AGREEMENT DATED __________
                   BETWEEN THE REGISTERED HOLDER HEREOF AND VIACOM, A COPY OF
                   WHICH AGREEMENT IS ON FILE AT THE PRINCIPAL OFFICES OF
                   VIACOM."

                   F. I also understand that unless a sale or transfer is made
          in conformity with the provisions of Rule 145, or pursuant to a
          registration statement, Viacom reserves the right to put the following
          legend on the certificates issued to my transferee:

                   "THE [SHARES] [OPTIONS] REPRESENTED BY THIS CERTIFICATE HAVE
                   NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND WERE
                   ACQUIRED FROM A PERSON WHO RECEIVED SUCH SHARES IN A
                   TRANSACTION TO WHICH RULE 145 PROMULGATED UNDER THE
                   SECURITIES ACT OF 1933 APPLIES. THE [SHARES] [OPTIONS] HAVE
                   BEEN ACQUIRED BY THE HOLDER NOT WITH A VIEW TO, OR FOR RESALE
                   IN
<PAGE>

                                        3

                   CONNECTION WITH, ANY DISTRIBUTION THEREOF WITHIN THE MEANING
                   OF THE SECURITIES ACT OF 1933 AND MAY NOT BE SOLD, PLEDGED OR
                   OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH AN EXEMPTION
                   FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OF
                   1933."

                   It is understood and agreed that the legends set forth in
paragraphs E and F above shall be removed by delivery of substitute certificates
without such legend if the undersigned shall have delivered to Viacom a copy of
a letter from the staff of the Commission, or an opinion of counsel reasonably
satisfactory to Viacom in form and substance reasonably satisfactory to Viacom,
to the effect that such legend is not required for purposes of the Act.

                   Execution of this letter should not be considered an
admission on my part that I am an "affiliate" of the Company as described in the
first paragraph of this letter, or as a waiver of any rights I may have to
object to any claim that I am such an affiliate on or after the date of this
letter.

                                            Very truly yours,


                                            ------------------------------------
                                            Name:


Accepted this ____ day of
__________, ____, by

VIACOM INC.


By:
   -------------------------------------
    Name:
    Title:
<PAGE>

                                                                        ANNEX B
                      RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                                   VIACOM INC.

(Originally incorporated on November 10, 1986 under the name Arsenal Holdings,
Inc.)

                                    ARTICLE I

                                      NAME

   The name of this Corporation is Viacom Inc.

                                   ARTICLE II

                   REGISTERED OFFICE AND AGENT FOR SERVICE

   The registered office of the Corporation in the State of Delaware is located
at 1013 Centre Road, City of Wilmington, County of New Castle. The name and
address of the Corporation's registered agent for service of process in Delaware
is:

                           Corporation Service Company
                                1013 Centre Road
                         Wilmington, Delaware 19805-1297

                                   ARTICLE III

                               CORPORATE PURPOSES

   The purpose of the Corporation is to engage in any lawful act or activity for
which corporations may be organized under the General Corporation Law of the
State of Delaware.

                                   ARTICLE IV

                                  CAPITAL STOCK

   (1)   Shares, Classes and Series Authorized.

      (a) The total number of shares of all classes of capital stock which the
   Corporation shall have authority to issue is 3,700,000,000 shares. The
   classes and the aggregate number of shares of stock of each class which the
   Corporation shall have authority to issue are as follows:

         (i) 500,000,000 shares of Class A Common Stock, $0.01 par value ("Class
      A Common Stock").

         (ii) 3,000,000,000 shares of Class B Common Stock, $0.01 par value
      ("Class B Common Stock").
<PAGE>

         (iii) 200,000,000 shares of Preferred Stock, $0.01 par value
      ("Preferred Stock").

      (b) The number of authorized shares of Class B Common Stock may be
   increased or decreased (but not below the number of shares thereof then
   outstanding) from time to time by the affirmative vote of the holders of a
   majority of the stock of the Corporation entitled to vote.

   (2)   Powers and Rights of the Class A Common Stock and the Class B Common
         Stock.

   Except as otherwise expressly provided in this Restated Certificate of
Incorporation, all issued and outstanding shares of Class A Common Stock and
Class B Common Stock shall be identical and shall entitle the holders thereof to
the same rights and privileges.

      A. Voting Rights and Powers. Except as otherwise provided in this Restated
   Certificate of Incorporation or required by law, with respect to all matters
   upon which stockholders are entitled to vote, the holders of the outstanding
   shares of Class A Common Stock shall vote together with the holders of any
   other outstanding shares of capital stock of the Corporation entitled to
   vote, without regard to class, and every holder of outstanding shares of
   Class A Common Stock shall be entitled to cast thereon one vote in person or
   by proxy for each share of Class A Common Stock standing in his name. The
   holders of shares of Class A Common Stock shall have the relevant class
   voting rights set forth in Article IX. Except as otherwise required by law,
   the holders of outstanding shares of Class B Common Stock shall not be
   entitled to any votes upon any questions presented to stockholders of the
   Corporation, including but not limited to, whether to increase or decrease
   (but not below the number of shares then outstanding) the number of
   authorized shares of Class B Common Stock.

      B. Dividends. Subject to the rights and preferences of the Preferred Stock
   set forth in this Article IV and in any resolution or resolutions providing
   for the issuance of such stock as set forth in Section (3) of this Article
   IV, the holders of Class A Common Stock and Class B Common Stock shall be
   entitled to receive ratably such dividends as may from time to time be
   declared by the Board of Directors out of funds legally available therefor.


                                      2
<PAGE>

      C. Distribution of Assets Upon Liquidation. In the event the Corporation
   shall be liquidated, dissolved or wound up, whether voluntarily or
   involuntarily, after there shall have been paid or set aside for the holders
   of all shares of the Preferred Stock then outstanding the full preferential
   amounts to which they are entitled under the resolutions authorizing the
   issuance of such Preferred Stock, the net assets of the Corporation remaining
   thereafter shall be divided ratably among the holders of Class A Common Stock
   and Class B Common Stock.

      D. Split, Subdivision or Combination. If the Corporation shall in any
   manner split, subdivide or combine the outstanding shares of Class A Common
   Stock or Class B Common Stock, the outstanding shares of the other class of
   Common Stock shall be proportionally split, subdivided or combined in the
   same manner and on the same basis as the outstanding shares of the other
   class of Common Stock have been split, subdivided or combined.

      E. Conversion. So long as there are 10,000 shares of Class A Common Stock
   outstanding, each record holder of shares of Class A Common Stock or Class B
   Common Stock may convert any or all of such shares into an equal number of
   shares of Class B Common Stock by surrendering the certificates for such
   shares, accompanied by payment of documentary, stamp or similar issue or
   transfer taxes, if any, along with a written notice by such record holder to
   the Corporation stating that such record holder desires to convert such
   shares into the same number of shares of Class B Common Stock and requesting
   that the Corporation issue all of such Class B Common Stock to the persons
   named therein, setting forth the number of shares of Class B Common Stock to
   be issued to each such person and the denominations in which the certificates
   therefor are to be issued.

   (3)Powers and Rights of the Preferred Stock.

   Subject to Article XIII of this Restated Certificate of Incorporation, the
Preferred Stock may be issued from time to time in one or more series, with such
distinctive serial designations as may be stated or expressed in the resolution
or resolutions providing for the issue of such stock adopted from time to time
by the Board of Directors; and in such resolution or resolutions providing for
the issuance of shares of each particular series, the Board of Directors is also
expressly authorized to fix; the right to vote, if any; the consideration for
which the shares of such series are to be issued; the number of shares
constituting such series, which number may be increased (except as otherwise
fixed by the

                                       3
<PAGE>

Board of Directors) or decreased (but not below the number of shares thereof
then outstanding) from time to time by action of the Board of Directors; the
rate of dividends upon which and the times at which dividends on shares of such
series shall be payable and the preference, if any, which such dividends shall
have relative to dividends on shares of any other class or classes or any other
series of stock of the Corporation; whether such dividends shall be cumulative
or noncumulative, and, if cumulative, the date or dates from which dividends on
shares of such series shall be cumulative; the rights, if any, which the holders
of shares of such series shall have in the event of any voluntary or involuntary
liquidation, merger, consolidation, distribution or sale of assets, dissolution
or winding up of the affairs of the Corporation; the rights, if any, which the
holders of shares of such series shall have to convert such shares into or
exchange such shares for shares of any other class or classes or any other
series of stock of the Corporation or for any debt securities of the Corporation
and the terms and conditions, including, without limitation, price and rate of
exchange, of such conversion or exchange, whether shares of such series shall be
subject to redemption, and the redemption price or prices and other terms of
redemption, if any, for shares of such series including, without limitation, a
redemption price or prices payable in shares of Class A Common Stock or Class B
Common Stock; the terms and amounts of any sinking fund for the purchase or
redemption of shares of such series; and any and all other powers, preferences
and relative, participating, optional or other special rights and
qualifications, limitations or restrictions thereof pertaining to shares of such
series permitted by law.

   (4)Issuance of Class A Common Stock, Class B Common Stock and Preferred
Stock.

   Subject to Article XIII of this Restated Certificate of Incorporation, the
Board of Directors of the Corporation may from time to time authorize by
resolution the issuance of any or all shares of Class A Common Stock, Class B
Common Stock and Preferred Stock herein authorized in accordance with the terms
and conditions set forth in this Restated Certificate of Incorporation for such
purposes, in such amounts, to such persons, corporations, or entities, for such
consideration, and in the case of the Preferred Stock, in one or more series,
all as the Board of Directors in its discretion may determine and without any
vote or other action by any of the stockholders of the Corporation, except as
otherwise required by law.

                                       4
<PAGE>

                                    ARTICLE V

                                    DIRECTORS

   (1) Power of the Board of Directors. Subject to Article XIII of this Restated
Certificate of Incorporation, the property and business of the Corporation shall
be controlled and managed by or under the direction of its Board of Directors.
In furtherance, and not in limitation of the powers conferred by the laws of the
State of Delaware, the Board of Directors is expressly authorized, subject in
all cases to Article XIII of this Restated Certificate of Incorporation:

      (a) To make, alter, amend or repeal the By-Laws of the Corporation;
   provided that no By-Laws hereafter adopted shall invalidate any prior act of
   the Directors that would have been valid if such By-Laws had not been
   adopted;

      (b) To determine the rights, powers, duties, rules and procedures that
   affect the power of the Board of Directors to manage and direct the property,
   business and affairs of the Corporation, including, without limitation, the
   power to designate and empower committees of the Board of Directors, to
   elect, appoint and empower the officers and other agents of the Corporation,
   and to determine the time and place of, and the notice requirements for Board
   meetings, as well as the manner of taking Board action; and

      (c) To exercise all such powers and do all such acts as may be exercised
   by the Corporation, subject to the provisions of the laws of the State of
   Delaware, this Restated Certificate of Incorporation, and the By-Laws of the
   Corporation.

   (2) Number and Qualifications of Directors. The number of directors
constituting the entire Board of Directors shall be fixed from time to time by
resolution of the Board of Directors but shall not be less than three nor more
than twenty. Directors shall be elected to hold office for a term of one year.
As used in this Restated Certificate of Incorporation, the term "entire Board of
Directors" means the total number of Directors fixed in the manner provided in
this Article V Section (2) and in the By-Laws.

                                       5
<PAGE>

                                   ARTICLE VI

                          INDEMNIFICATION OF DIRECTORS,
                               OFFICERS AND OTHERS

   (1)Action Not By or on Behalf of Corporation. The Corporation shall indemnify
any person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative (other than an action by or in the
right of the Corporation) by reason of the fact that he is or was a Director,
officer, employee or agent of the Corporation, or is or was serving at the
request of the Corporation as a director, officer, employee or agent (including,
without limitation, a trustee) of another corporation, partnership, joint
venture, trust or other enterprise, against judgments, fines, amounts paid in
settlement and expenses (including, without limitation, attorneys' fees),
actually and reasonably incurred by him in connection with such action, suit or
proceeding if he acted in good faith and in a manner reasonably believed to be
in or not opposed to the best interests of the Corporation, and with respect to
any criminal action or proceeding, had no reasonable cause to believe his
conduct was unlawful. The termination of any action, suit or proceeding by
judgment, order, settlement, conviction, or upon a plea of nolo contendere or
its equivalent, shall not, of itself, create a presumption that the person did
not act in good faith and in a manner which he reasonably believed to be in or
not opposed to the best interests of the Corporation, and, with respect to any
criminal action or proceeding, had reasonable cause to believe that his conduct
was unlawful.

   (2)Action By or on Behalf of Corporation. The Corporation shall indemnify any
person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action or suit by or in the right of the
Corporation to procure a judgment in its favor by reason of the fact that he is
or was a Director, officer, employee or agent of the Corporation, or is or was
serving at the request of the Corporation as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust, or other
enterprise against expenses (including, without limitation, attorneys' fees)
actually and reasonably incurred by him in connection with the defense or
settlement of such action or suit if he acted in good faith and in a manner he
reasonably believed to be in or not opposed to the best interests of the
Corporation, except that no indemnification shall be made in respect of any
claim, issue or matter as to which such person shall have been adjudged to be
liable to the Corporation unless and only to the extent that the court in

                                       6
<PAGE>

which such action or suit was brought shall determine upon application that,
despite the adjudication of liability and in view of all of the circumstances of
the case, such person is fairly and reasonably entitled to indemnity for such
expenses which the court shall deem proper.

   (3)Successful Defense. To the extent that a present or former Director,
officer, employee or agent of the Corporation has been successful on the merits
or otherwise in defense of any action, suit or proceeding referred to in Section
1 or 2 of this Article VI, or in defense of any claim, issue or matter therein,
he shall be indemnified against expenses (including, without limitation,
attorneys' fees) actually and reasonably incurred by him in connection
therewith.

   (4) Determination of Right to Indemnification in Certain Circumstances. Any
indemnification under Section 1 or 2 of this Article VI (unless ordered by a
court) shall be made by the Corporation only as authorized in the specific case
upon a determination that indemnification of the present or former Director,
officer, employee or agent is proper in the circumstances because he has met the
applicable standard of conduct set forth in Section 1 or 2 of this Article IV.
Such determination shall be made, with respect to a person who is a Director or
officer at the time of such determination, (1) by a majority vote of the
Directors who are not parties to such action, suit or proceeding, even though
less than a quorum, or (2) by a committee of such Directors designated by a
majority vote of such Directors, even though less than a quorum, or (3) if there
are no such Directors, or if such Directors so direct, by independent legal
counsel in a written opinion, or (4) by the stockholders of the Corporation
entitled to vote thereon.

   (5)  Advance Payment of Expenses.

      (a) Expenses (including attorneys' fees) incurred by a Director or officer
in defending any civil, criminal, administrative or investigative action, suit
or proceeding shall be paid by the Corporation in advance of the final
disposition of such action, suit or proceeding upon receipt of an undertaking by
or on behalf of such Director or officer, to repay such amount if it shall
ultimately be determined that he is not entitled to be indemnified by the
Corporation as authorized in this Article.

      (b) Expenses (including attorneys' fees) incurred by any other employee or
agent in defending any civil, criminal, administrative or investigative action,
suit or proceeding may be paid by the Corporation in advance of the final
disposition

                                       7
<PAGE>

of such action, suit or proceeding upon such terms and conditions, if any, as
the Corporation deems appropriate.

   (6)Not Exclusive. The indemnification and advancement of expenses provided
by, or granted pursuant to, the other sections of this Article VI shall not be
deemed exclusive of any other rights to which a person seeking indemnification
or advancement of expenses may be entitled under any statute, by-law, agreement,
vote of stockholders or disinterested Directors or otherwise, both as to action
in his official capacity and as to action in another capacity while holding such
office. Without limiting the foregoing, the Corporation is authorized to enter
into an agreement with any Director, officer, employee or agent of the
Corporation providing indemnification for such person against expenses,
including, without limitation, attorneys' fees, judgments, fines and amounts
paid in settlement that result from any threatened, pending or completed action,
suit, or proceeding, whether civil, criminal, administrative or investigative,
including, without limitation, any action by or in the right of the Corporation,
that arises by reason of the fact that such person is or was a Director,
officer, employee or agent of the Corporation, or is or was serving at the
request of the Corporation as a director, officer, employee or agent of another
corporation, partnership, joint venture, trust or other enterprise, to the full
extent allowed by law, except that no such agreement shall provide for
indemnification for any actions that constitute fraud, actual dishonesty or
willful misconduct.

   (7)Insurance. The Corporation may purchase and maintain insurance on behalf
of any person who is or was a Director, officer, employee or agent of the
Corporation, or is or was serving as the request of the Corporation as a
director, officer, employee or agent of another corporation, partnership, joint
venture, trust or other enterprise against any liability asserted against him
and incurred by him in any such capacity, or arising out of his status as such,
whether or not the Corporation would have the power to indemnify him against
such liability under the provisions of this Article VI.

   (8)Certain Definitions. For the purposes of this Article VI, (A) any
Director, officer, employee or agent of the Corporation who shall serve as a
director, officer, employee or agent of any other corporation, joint venture,
trust or other enterprise of which the Corporation, directly or indirectly, is
or was a stockholder or creditor, or in which the Corporation is or was in any
way interested, or (B) any director, officer, employee or agent of any
subsidiary corporation, joint venture, trust or other enterprise wholly

                                       8
<PAGE>

owned by the Corporation, shall be deemed to be serving as such director,
officer, employee or agent at the request of the Corporation, unless the Board
of Directors of the Corporation shall determine otherwise. In all other
instances where any person shall serve as a director, officer, employee or agent
of another corporation, joint venture, trust or other enterprise of which the
Corporation is or was a stockholder or creditor, or in which it is or was
otherwise interested, if it is not otherwise established that such person is or
was serving as such director, officer, employee or agent at the request of the
Corporation, the Board of Directors of the Corporation may determine whether
such service is or was at the request of the Corporation, and it shall not be
necessary to show any actual or prior request for such service. For purposes of
this Article VI, references to a corporation include all constituent
corporations absorbed in a consolidation or merger as well as the resulting or
surviving corporation so that any person who is or was a director, officer,
employee or agent of such a constituent corporation or is or was serving at the
request of such constituent corporation as a director, officer, employee or
agent of another corporation, joint venture, trust or other enterprise shall
stand in the same position under the provisions of this Article VI with respect
to the resulting or surviving corporation as he would if he had served the
resulting or surviving corporation in the same capacity. For purposes of this
Article VI, references to "other enterprises" shall include employee benefit
plans; references to "fines" shall include any excise taxes assessed on a person
with respect to an employee benefit plan; and references to "serving at the
request of the Corporation" shall include any service as a director, officer,
employee or agent of the Corporation which imposes duties on, or involves
services by, such director, officer, employee, or agent with respect to an
employee benefit plan, its participants, or beneficiaries, and a person who
acted in good faith and in a manner he reasonably believed to be in the interest
of the participants and beneficiaries of an employee benefit plan shall be
deemed to have acted in a manner "not opposed to the best interests of the
Corporation" as referred to in this Article VI.

   (9)The indemnification and advancement of expenses provided by, or granted
pursuant to, this Article VI shall, unless otherwise provided when authorized or
ratified, continue as to a person who has ceased to be a director, officer,
employee or agent and shall inure to the benefit of the heirs, executors and
administrators of such a person.

                                       9
<PAGE>

                                   ARTICLE VII

                      DIRECTOR LIABILITY TO THE CORPORATION

   (a)A Director's liability to the Corporation for breach of duty to the
Corporation or its stockholders shall be limited to the fullest extent permitted
by Delaware law as now in effect or hereafter amended. In particular no Director
of the Corporation shall be liable to the Corporation or any of its stockholders
for monetary damages for breach of fiduciary duty as a director, except for
liability (i) for any breach of the Director's duty of loyalty to the
Corporation or its stockholders, (ii) for acts or omissions not in good faith or
which involve intentional misconduct or a knowing violation of law, (iii) under
Section 174 of the Delaware General Corporation Law, as the same exists or
hereafter may be amended, or (iv) for any transaction from which the Director
derived an improper personal benefit.

   (b)Any repeal or modification of the foregoing paragraph (a) by the
stockholders of the Corporation entitled to vote thereon shall not adversely
affect any right or protection of a director of the Corporation existing at the
time of such repeal or modification.

   (c)If the General Corporation Law of the State of Delaware is amended to
authorize corporate action further eliminating or limiting the liability of
directors, then a director of the Corporation, in addition to the circumstances
in which he is not now liable, shall be free of liability to the fullest extent
permitted by the General Corporation Law of the State of Delaware, as so
amended.

                                  ARTICLE VIII

                          RESERVATION OF RIGHT TO AMEND
                          CERTIFICATE OF INCORPORATION

   Subject to Article XIII of this Restated Certificate of Incorporation, the
Corporation reserves the right to amend, alter, change or repeal any provision
contained in this Restated Certificate of Incorporation in the manner now or
hereafter prescribed by law, and all the provisions of this Restated Certificate
of Incorporation and all rights and powers conferred in this Restated
Certificate of Incorporation on stockholders, directors and officers are subject
to this reserved power.

   Each reference in the Restated Certificate of Incorporation to "the Restated
Certificate of Incorporation", "hereunder", "hereof", or words of like import
and each reference to the

                                       10
<PAGE>

Restated Certificate of Incorporation set forth in any amendment to the Restated
Certificate of Incorporation shall mean and be a reference to the Restated
Certificate of Incorporation as supplemented and amended through such amendment
to the Restated Certificate of Incorporation.

                                   ARTICLE IX

                                  VOTING RIGHTS

   (1)Class A Common Stock. In addition to any other approval required by law or
by this Restated Certificate of Incorporation, the affirmative vote of a
majority of the then outstanding shares of Class A Common Stock, voted
separately as a class, shall be necessary to approve any consolidation of the
Corporation with another corporation, any merger of the Corporation into another
corporation or any merger of any other corporation into the Corporation pursuant
to which shares of Common Stock are converted into or exchanged for any
securities or any other consideration.

   (2)Preferred Stock. Subject to Article XIII of this Restated Certificate of
Incorporation, in addition to any other approval required by law or by this
Restated Certificate of Incorporation, each particular series of any class of
Preferred Stock shall have such right to vote, if any, as shall be fixed in the
resolution or resolutions, adopted by the Board of Directors, providing for the
issuance of shares of such particular series.

                                    ARTICLE X

                                 STOCK OWNERSHIP
                       AND THE FEDERAL COMMUNICATIONS LAWS

   (1)Requests for Information. So long as the Corporation or any of its
subsidiaries holds any authorization from the Federal Communications Commission
(or any successor thereto), if the Corporation has reason to believe that the
ownership, or proposed ownership, of shares of capital stock of the Corporation
by any stockholder or any person presenting any shares of capital stock of the
Corporation for transfer into his name (a "Proposed Transferee") may be
inconsistent with, or in violation of, any provision of the Federal
Communications Laws (as hereinafter defined), such stockholder or Proposed
Transferee, upon request of the Corporation, shall furnish promptly to the
Corporation such information (including, without limitation, information with
respect to citizenship, other ownership interests and affiliations) as the
Corporation shall reasonably request to determine whether the ownership of, or
the exercise of any rights with respect


                                       11
<PAGE>

to, shares of capital stock of the Corporation by such stockholder or Proposed
Transferee is inconsistent with, or in violation of, the Federal Communications
Laws. For purposes of this Article X, the term "Federal Communications Laws"
shall mean any law of the United States now or hereafter in effect (and any
regulation thereunder) pertaining to the ownership of, or the exercise of the
rights of ownership with respect to, capital stock of corporations holding,
directly or indirectly, Federal Communications Commissions authorizations,
including, without limitation, the Communications Act of 1934, as amended (the
"Communications Act"), and regulations thereunder pertaining to the ownership,
or the exercise of the rights of ownership, of capital stock of corporations
holding, directly or indirectly, Federal Communications Commission
authorizations, by (i) aliens, as defined in or under the Communications Act, as
it may be amended from time to time, (ii) persons and entities having interests
in television or radio stations, daily newspapers and cable television systems
or (iii) persons or entities, unilaterally or otherwise, seeking direct or
indirect control of the Corporation, as construed under the Communications Act,
without having obtained any requisite prior Federal regulatory approval to such
control.

   (2)Denial of Rights, Refusal to Transfer. If any stockholder or Proposed
Transferee from whom information is requested should fail to respond to such
request pursuant to Section (1) of this Article or the Corporation shall
conclude that the ownership of, or the exercise of any rights of ownership with
respect to, shares of capital stock of the Corporation, by such stockholder or
Proposed Transferee, could result in any inconsistency with, or violation of,
the Federal Communications Laws, the Corporation may refuse to permit the
transfer of shares of capital stock of the Corporation to such Proposed
Transferee, or may suspend those rights of stock ownership the exercise of which
would result in any inconsistency with, or violation of, the Federal
Communications Laws, such refusal of transfer or suspension to remain in effect
until the requested information has been received and the Corporation has
determined that such transfer, or the exercise of such suspended rights, as the
case may be, is permissible under the Federal Communications Laws, and the
Corporation may exercise any and all appropriate remedies, at law or in equity,
in any court of competent jurisdiction, against any such stockholder or Proposed
Transferee, with a view towards obtaining such information or preventing or
curing any situation which would cause any inconsistency with, or violation of,
any provision of the Federal Communications Laws.

                                       12
<PAGE>

   (3)Legends. The Corporation may note on the certificates of its capital stock
that the shares represented by such certificates are subject to the restrictions
set forth in this Article.

   (4)Certain Definitions. For purposes of this Article, the word "person" shall
include not only natural persons but partnerships, associations, corporations,
joint ventures and other entities, and the word "regulation" shall include not
only regulations but rules, published policies and published controlling
interpretations by an administrative agency or body empowered to administer a
statutory provision of the Federal Communications Laws.

                                   ARTICLE XI

                  TRANSACTIONS WITH DIRECTORS AND OFFICERS

   No contract or transaction between the Corporation and one or more of its
directors or officers, or between the Corporation and any other corporation,
partnership, association, or other organization in which one or more of its
directors or officers are directors or officers, or have a financial interest,
shall be void or voidable solely for this reason, or solely because the director
or officer is present at or participates in the meeting of the board or
committee thereof which authorizes the contract or transaction, or solely
because his or their votes are counted for such purpose if (a) the material
facts as to his relationship or interest and as to the contract or transaction
are disclosed or are known to the Board of Directors or the committee, and the
Board of Directors or the committee in good faith authorizes the contract or
transaction by the affirmative votes of a majority of the disinterested
directors, even though the disinterested directors be less than a quorum, or (b)
the material facts as to his relationship or interest and as to the contract or
transaction are disclosed or are known to the stockholders entitled to vote
thereon, and the contract or transaction is specifically approved in good faith
by vote of such stockholders, or (c) the contract or transaction is fair as to
the Corporation as of the time it is authorized, approved or ratified by the
Board of Directors, a committee thereof, or the stockholders entitled to vote
thereon. Common or interested directors may be counted in determining the
presence of a quorum at a meeting of the Board of Directors or of a committee
which authorizes the contract or transaction.

                                       13
<PAGE>

                                   ARTICLE XII

                          COMPROMISE AND REORGANIZATION

   Whenever a compromise or arrangement is proposed between this Corporation and
its creditors or any class of them and/or between this Corporation and its
stockholders or any class of them, any court of equitable jurisdiction within
the State of Delaware may, on the application in a summary way of this
Corporation or of any creditor or stockholder thereof or on the application of
any receiver or receivers appointed for this Corporation under the provisions of
Section 291 of Title 8 of the Delaware Code or on the application of trustees in
dissolution or of any receiver or receivers appointed for this Corporation under
the provisions of Section 279 of Title 8 of the Delaware Code order a meeting of
the creditors or class of creditors, and/or of the stockholders or class of
stockholders of this Corporation, as the case may be, to be summoned in such
manner as the said court directs. If a majority in number representing
three-fourths in value of the creditors or class of creditors, and/or of the
stockholders or class of stockholders of this Corporation, as the case may be,
agrees to any compromise or arrangement and to any reorganization of the
Corporation as a consequence of such compromise or arrangement, the said
compromise or arrangement and the said reorganization shall, if sanctioned by
the court to which the said application has been made, be binding on all the
creditors or class of creditors, and/or on all the stockholders or class of
stockholders, of this Corporation, as the case may be, and also on this
Corporation.

                                  ARTICLE XIII

                          GOVERNANCE OF THE CORPORATION
                             DURING SPECIFIED PERIOD

(1) Definitions. As used in this Article XIII, the following terms shall have
the following meanings:

(a) "CBS" shall mean CBS Corporation, a Pennsylvania corporation, immediately
prior to the Effective Time.

(b) "CBS Directors" shall mean (i) eight (8) of those directors serving as
members of the Board of Directors of CBS on September 6, 1999 (or any
Independent Directors elected or appointed prior to the Effective Time to serve
as a CBS Director) who are designated as such by the Board of Directors of CBS
prior to the Effective Time and (ii) any Replacement CBS Director (as defined in
Section 2(b) of this Article XIII).

                                       14
<PAGE>

(c) "CEO" shall mean the Chief Executive Officer.

(d) "COO" shall mean the President and Chief Operating Officer.

(e) "Effective Time" shall mean the time of filing of the Certificate of Merger
to which this Certificate of Incorporation is attached.

(f) "Independent Director" shall mean a disinterested, independent person
(determined in accordance with customary standards for independent directors
applicable to U.S. public companies).

(g) "NAI" shall mean National Amusements, Inc., a Maryland corporation, and its
successors or assigns.

(h) "Specified Independent Directors" shall mean the directors of
the Corporation first elected after 1993 and who are not management of the
Corporation or NAI (together with any replacements of such persons).

(i) "Specified Period" shall mean the period of three years commencing at the
Effective Time.

(j) "Stockholder Agreement" shall mean the Stockholder
Agreement dated as of September 6, 1999, by and between NAI and CBS, relating to
Corporation governance matters.

(k) "Viacom Directors" shall mean the ten (10) directors of the Corporation
serving as the Board of Directors of the Corporation immediately prior to the
Effective Time (including the Specified Independent Directors).

(2) Directors.

(a) Effective immediately at the Effective Time, the Board of Directors shall
consist of eighteen (18) directors. The number of directors may be fixed by
resolution of the Board from time to time, provided, however, that the size of
the Board of Directors may not be changed during the Specified Period without
the approval of at least fourteen (14) directors. At the Effective Time, ten
(10) directors shall be Viacom Directors and eight (8) directors shall be CBS
Directors.

(b) Until the expiration of the Specified Period, the Board of Directors
(subject to the fiduciary duties of the directors) shall take all action
necessary to ensure that any seat on the Board of Directors held by (i) a CBS
Director which becomes vacant is filled promptly by a person qualifying

                                       15
<PAGE>

as an Independent Director and designated to fill such seat by a majority of the
CBS Directors remaining on the Board of Directors (a "Replacement CBS Director")
and (ii) a Specified Independent Director which becomes vacant is filled
promptly by an Independent Director who is the chief executive officer, chief
operating officer or chief financial officer or former chief executive officer
of a Fortune 500 company or a non-U.S. public company of comparable size.

(c) During the Specified Period, all committees of the Board of Directors (other
than the Compensation Committee and the Officers Nominating Committee) shall
have such number of CBS Directors as equals the total number of members of the
Committee multiplied by a fraction, the numerator of which is eight (8) and the
denominator of which is eighteen (18), rounded to the closest whole number;
provided that in no event shall any committee have (x) fewer than one (1) CBS
Director or (y) less than a majority of Viacom Directors.

(d) During the Specified Period, the Board of Directors shall not take any
action or fail to take any action which would have the effect of eliminating,
limiting, restricting, avoiding or otherwise modifying the effect of the
provisions set forth in this Article XIII (e.g., by creating a holding company
structure if the certificate of incorporation or similar document of such
holding company does not contain equivalent provisions).

(3) Chairman and Chief Executive Officer.

(a) At the Effective Time, Sumner Redstone shall remain the Chairman and CEO. In
the event that Sumner Redstone is not the CEO at the Effective Time or ceases to
be the CEO at any time during the Specified Period, then Mel Karmazin, if he is
COO at such time, shall succeed to the position of CEO for the remainder of the
Specified Period. During any such period of succession, Mel Karmazin shall
continue to exercise the powers, rights, functions and responsibilities of the
COO in addition to exercising those of the CEO.

(b) The Chairman shall chair all meetings of the Board of Directors and
stockholders at which he is present.

(c) The CEO shall be responsible, in consultation with the COO, for corporate
policy and strategy and the COO shall consult on all major decisions with, and
shall report directly to, the CEO, during the Specified Period; provided,
however, that the CEO shall not exercise any powers, rights, functions or
responsibilities of the COO unless Mel Karmazin is the CEO.

                                       16
<PAGE>

(4)      President and Chief Operating Officer.

(a) At the Effective Time, the President and Chief Operating Officer of the
Corporation shall be Mel Karmazin. During the Specified Period, Mel Karmazin may
not be terminated or demoted from the position of COO (or, in the event that
Sumner Redstone is not the CEO, from the position of CEO) and no COO Functions
(as defined below) may be changed without the affirmative vote of at least
fourteen (14) directors.

(b) Subject to the requirement that the COO consult with the CEO on all major
decisions, the powers, rights, functions and responsibilities of the COO
(collectively, the "COO Functions") shall include, without limitation, the
following:

     (i) supervising, coordinating and managing the Corporation's business,
   operations, activities, operating expenses and capital allocation;

     (ii) matters relating to officers (other than the Chairman, CEO and COO)
   and employees, including, without limitation, hiring (subject to (A) the
   specific Board of Directors authority described below with respect to the
   CFO, the General Counsel and the Controller and (B) Section 5 below),
   terminating, changing positions and allocating responsibilities of such
   officers and employees; and

     (iii) substantially all of the powers, rights, functions and
   responsibilities typically exercised by a chief operating officer.

      All officers (other than the Chairman, CEO and COO) will report, directly
or indirectly, to the COO (this reporting relationship will be deemed a COO
Function).

(c) In the event that Mel Karmazin is not COO or CEO, the Board may terminate
the COO's employment, eliminate the COO position and the Officers Nominating
Committee and reallocate the COO Functions without regard to the other
provisions of this Article XVIII.

(5) Officers Nominating Committee; Compensation Committee.

   (a) Subject to the powers of the Compensation Committee set forth below,
during the Specified Period, all powers of the Board of Directors, including,
without limitation, the right to hire, elect, terminate, change positions,
allocate responsibilities or determine non-equity compensation, with respect to
officers and employees, shall be exercised, subject

                                       17
<PAGE>

to clauses (b) and (c) below, by, and delegated to, the Officers Nominating
Committee of the Board of Directors. The Officers Nominating Committee shall
consist solely of the member of the Board of Directors who is the COO, except
that in the event Mel Karmazin succeeds to the position of CEO, the sole member
of the Officers Nominating Committee shall be the member of the Board of
Directors who is the CEO.

(b) The Officers Nominating Committee shall have no powers with respect to the
Chairman, CEO and COO, and shall not have the power to fill the positions of
Chief Financial Officer, Controller or General Counsel of the Corporation
without the approval of the Board of Directors; provided that this provision
shall in no way affect the other powers and authorities of the Officers
Nominating Committee with respect to the Chief Financial Officer, Controller and
General Counsel positions, including, without limitation, the power to terminate
employment of persons holding such positions.

(c) The Compensation Committee shall not be required to, or have any power to,
approve the annual compensation of (i) any employee if the total value of such
employee's annual cash compensation (assuming for this purpose that the actual
bonus of each officer and employee is equal to his or her target bonus) is less
than $1 million or (ii) talent (as such term is commonly used in the media or
entertainment industries), in each such case which power shall be delegated to
the Officers Nominating Committee. The annual compensation of all other officers
and employees and any equity or equity-based compensation of any officer or
employee must be approved by the Compensation Committee.

(d) The Compensation Committee shall consist of three CBS Directors who are
Independent Directors and three non-CBS Directors, two of whom will be the
Specified Independent Directors and the other of whom will be an Independent
Director.

(e) Any decision or determination of the Officers Nominating
Committee may be reversed or overridden by (and only by) the affirmative vote of
at least fourteen (14) directors.

(6)      Stockholder Agreement.

      The Stockholder Agreement may not be amended, and no provision thereof may
be modified or waived, except with the approval of at least fourteen (14)
directors.

                                       18
<PAGE>

(7)      Issuance of Voting Stock.

      During the Specified Period, in addition to any other approval required by
law or by this Restated Certificate of Incorporation, the Corporation may not
issue (i) additional shares of Class A Common Stock or (ii) any shares of
Preferred Stock or any other class or series of stock or securities, in each
case with, or convertible into or exchangeable or exercisable for stock or other
securities with, the right to vote on any matter on which stockholders are
entitled to vote if the result would be that parties bound by the Stockholder
Agreement could fail to own at least a majority of the outstanding shares of
voting stock of the Corporation.

(8)      Voting

      During the Specified Period, except for those actions set forth on Annex I
to this Restated Certificate of Incorporation, which shall require the approval
of the Board of Directors, all action by the Board of Directors shall require
the affirmative vote of at least fourteen (14) directors. At all meetings of the
Board of Directors a majority of the full Board of Directors shall constitute a
quorum for the transaction of business and the act of a majority of the
Directors present at any meeting at which there is a quorum shall be the act of
the Board of Directors, except as may be otherwise specifically provided by
statute or this Restated Certificate of Incorporation. If a quorum shall not be
present at any meeting of the Board of Directors, the Directors present thereat
may adjourn the meeting from time to time, without notice other than
announcement at the meeting, until a quorum shall be present.

(9)      Amendment.

      Until the expiration of the Specified Period the provisions of any Article
of this Restated Certificate which refer to this Article XIII, the provisions of
this Article XIII, and the provisions of Article VIII of the by-laws of the
Corporation, may not be amended, altered, repealed or waived in any respect
without the approval of at least fourteen (14) directors.

(10)      Successors.

      During the Specified Period, the provisions of this Article XIII shall be
applicable to (i) any successor to the Corporation as the result of a merger,
consolidation or other business combination, whether or not the Corporation is
the surviving company in such transaction, or otherwise and (ii) any corporation
or other entity with respect to which the

                                       19
<PAGE>

Corporation or its successor is or becomes a direct or indirect subsidiary, the
Board of Directors shall not permit the Corporation to be a party to any
transaction which would not comply with the foregoing without the approval of at
least fourteen (14) directors.

(11)      Subsidiaries.

      The Board of Directors shall have the right, following consultation with
the COO or, if Mel Karmazin is the CEO, the CEO, with respect to any public
company which is a subsidiary of the Corporation, to take such steps as the
Board of Directors reasonably determines are necessary to implement corporate
governance arrangements applicable to such subsidiary in a manner as consistent
as practicable with the provisions contained in this Restated Certificate of
Incorporation; provided that any such steps shall not vest in the Board of
Directors greater power or provide the COO with fewer rights than those provided
for in this Restated Certificate of Incorporation.




                                       20
<PAGE>

                                                                         ANNEX I
                                                         TO VIACOM INC. RESTATED
                                                    CERTIFICATE OF INCORPORATION


      The provisions of this Annex I shall form a part of, and be incorporated
in all respects in, the Restated Certificate of Incorporation to which this
Annex I is attached. The following actions shall require the approval of a
majority of the directors:

A. Acquisitions, Divestitures, Joint Ventures, Guarantees

   *  Any acquisition, equity investment or joint venture (each an
      "Acquisition") by the Corporation or any of its subsidiaries for more than
      $25 million.
   *  Any divestiture or other sale of assets (each a "Divestiture") (not in the
      ordinary course) by the Corporation or any of its subsidiaries for more
      than $25 million (based on purchase price or net book value of assets).
   *  Any real estate purchase, sale or lease by the Corporation or any of
      its subsidiaries for more than $25 million.
   *  Any guarantee by the Corporation or any of its subsidiaries of an
      obligation of a third party where the obligation guaranteed is more than
      $25 million.
   *  Notwithstanding the above, any Acquisition or Divestiture by the
      Corporation or any of its subsidiaries  of (a) internet or internet
      related businesses for more than $25 million but less than $100
      million, with the value thereof represented by multi-year commitments
      for advertising, promotion and content licensing, is excluded, so long
      as the aggregate of such Acquisitions or Divestitures, in each case,
      does not exceed $550 million and (b) radio or outdoor advertising
      businesses for more than $25 million but less than $100 million, is
      excluded, so long as the aggregate of such Acquisitions or
      Divestitures, in each case, does not exceed $300 million; provided
      that (i) any Divestiture of shares of a publicly traded internet or
      internet related business with a value of up to $75 million is
      excluded and shall not be included in the calculation of any of the
      threshold amounts set forth above, (ii) Board approval may be secured
      (but is not required) for any transaction of more than $25 million but
      less than $100 million where the regular meeting schedule of the Board
      so permits (and shall not otherwise be required), (iii) the Board will
      be provided with information about and a status report on such
      transactions completed without Board approval and (iv) this limit of
      authority will be reviewed in 12 months from the Effective Time (as
      defined in Article XIII of the Restated Certificate) and may be
      amended only with the approval of 14 members of the Board of Directors.
<PAGE>

   *  Any contract of the Corporation or any of its subsidiaries not in the
      ordinary course with a value in excess of $25 million.
   *  Notwithstanding the above, any of the foregoing transactions that is
      approved by the Board shall not be included in the calculation of any of
      the threshold amounts set forth above.

B. Employee Matters

   *  Employee benefit plans (at the Corporation or a subsidiary):
      (a) creating a new plan, (b) suspending or terminating an existing
      plan, (c) any amendment that materially increases cost to the
      Corporation or subsidiary
   *  Entering into any modifications or amendments to the employment
      agreements with the CEO or the COO.

C. General

   *  The Annual Report on Form 10-K
   *  Proxy statement and notice of meeting (including annual or special
      meeting date, location, record date for voting)
   *  Any issuance of Corporation stock, or options, warrants or other similar
      rights (including stock appreciation rights) or debt or other securities
      convertible into or exchangeable for Corporation stock
   *  Any issuance of debt unless such debt is short term and is within the
      spending limits of the annual operating budget or is replacing
      existing debt
   *  Annual capital expenditure and annual operating budgets and individual
      capital expenditure transactions in excess of $25 million for the
      Corporation or any of its subsidiaries
   *  Any Corporation or subsidiary pays a dividend or repurchases stock
      from a third party
   *  Review and approve any action or transaction where Board action is
      required by law (other than ss. 141(a) of the Delaware General Corporation
      Law) or by the terms of the transaction (in all cases other than as
      specifically set forth in the Restated Certificate of Incorporation)
   *  Review and approve Board minutes
   *  Subject to Article XIII of the Restated Certificate of Incorporation,
      determine Board administration, including number of directors, meeting
      schedule, nominees, committees, director compensation, D&O insurance
      authorization, internal investigations and retention of advisors in
      connection therewith, and decisions regarding indemnification of
      individuals

                                       2
<PAGE>

   *  Subject to Article XIII of the Restated Certificate of Incorporation,
      amendments to the Restated Certificate of Incorporation and by-laws of
      the Corporation
   *  Commencement and settlement of major litigation
   *  Selection of independent auditors
   *  All matters on which the Corporation Board of Directors has
      historically taken action other than (1) matters relating to the subject
      matters addressed in this Annex I and not requiring approval of the Board
      of Directors hereunder and (2) those matters delegated to the COO,
      including all of the COO Functions (as defined in Article XIII of this
      Restated Certificate of Incorporation).


                                       3
<PAGE>

                                                                         ANNEX C










                                   VIACOM INC.

                              AMENDED AND RESTATED

                                  B Y - L A W S


                                    ARTICLE I
                                     OFFICES

                   Section 1. The registered office shall be in the City of
Wilmington, County of New Castle, State of Delaware.

                   Section 2. The Corporation may also have offices at such
other places both within and without the state of Delaware as the board of
directors may from time to time determine or the business of the Corporation may
require.

                                   ARTICLE II
                            MEETINGS OF STOCKHOLDERS

                   Section 1. Meetings of stockholders may be held at such time
and place, within or without the State of Delaware, as shall be stated in the
notice of the meeting or in a duly executed waiver of notice thereof. The annual
meeting of stockholders may be held at such place, within or without the State
of Delaware, as shall be designated by the board of directors and stated in the
notice of the meeting or in a duly executed waiver of notice thereof.
<PAGE>

                                        2

                   Section 2. The annual meeting of stockholders for the purpose
of electing directors and for the transaction of such other business as may
properly come before the meeting shall be held at such date and hour as shall be
determined by the board of directors or, in the absence of such determination,
on the third Thursday of the ninth month after the month end most nearly
coinciding with the close of the fiscal year of the Corporation.

                   Section 3. Written notice of the annual meeting stating the
place, date and hour of the meeting shall be given to each stockholder entitled
to vote at such meeting not less than ten nor more than sixty days before the
date of the meeting.

                   Section 4. The officer who has charge of the stock ledger of
the Corporation shall prepare and make, at least ten days before every meeting
of stockholders, a complete list of the stockholders entitled to vote at the
meeting, arranged in alphabetical order and showing the address of each
stockholder and the number of shares registered in the name of each stockholder.
Such list shall be open to the examination of any stockholder, for any purpose
germane to the meeting, during ordinary business hours, for a period of at least
ten days prior to the meeting, either at a place within the city where the
meeting is to be held, which place shall be specified in the notice
<PAGE>

                                        3

of the meeting, or, if not so specified, at the place where the meeting is to be
held. The list shall also be produced and kept open at the time and place of the
meeting during the whole time thereof, and may be inspected by any stockholder
who is present.

                   Section 5. Special meetings of the stockholders, for any
purpose or purposes, unless otherwise prescribed by statute or by the Restated
Certificate of Incorporation, may be called by the affirmative vote of a
majority of the board of directors, the Chairman of the Board, the Chief
Executive Officer, the Vice Chairman of the Board or the President and Chief
Operating Officer and shall be called by the Chairman of the Board, the Chief
Executive Officer, the Vice Chairman of the Board, the President and Chief
Operating Officer or Secretary at the request in writing of the holders of
record of at least 50.1% of the aggregate voting power of all outstanding shares
of capital stock of the Corporation entitled to vote generally in the election
of Directors, acting together as a single class. Such request shall state the
purpose or purposes of the proposed meeting.

                   Section 6. Written notice of a special meeting stating the
place, date and hour of the meeting and the purpose or purposes for which the
meeting is called, shall be given not less than ten nor more than sixty days
before
<PAGE>

                                        4

the date of the meeting to each stockholder of record entitled to vote at such
meeting.

                   Section 7. Business transacted at any special meeting of
stockholders shall be limited to the purposes stated in the notice.

                   Section 8. The holders of a majority of the aggregate voting
power of the shares of the capital stock issued and outstanding and entitled to
vote thereat, present in person or represented by proxy, shall constitute a
quorum at all meetings of the stockholders for the transaction of business
except as otherwise provided by statute or by the Restated Certificate of
Incorporation. If, however, such quorum shall not be present or represented at
any meeting of the stockholders, the stockholders entitled to vote thereat,
present in person or represented by proxy, shall have the power to adjourn the
meeting from time to time, without notice other than announcement at the
meeting, until a quorum shall be present or represented. At such adjourned
meeting at which a quorum shall be present or represented, any business may be
transacted which might have been transacted at the meeting as originally
notified. If the adjournment is for more than thirty days, or if after the
adjournment a new record date is fixed for the adjourned meeting, a notice of
the adjourned meeting shall be given to each stockholder of record entitled to
vote at the meeting.
<PAGE>

                                        5


                   Section 9. When a quorum is present at any meeting, the vote
of the holders of a majority of the aggregate voting power of the shares of the
capital stock having voting power present in person or represented by proxy
shall decide any question brought before such meeting, unless the question is
one upon which, by provision of applicable law or of the Restated Certificate of
Incorporation, a different vote is required in which case such express provision
shall govern and control the decision of such question.

                   Section 10. At every meeting of the stockholders, each
stockholder shall be entitled to vote, in person or by proxy executed in writing
by the stockholder or his duly authorized attorney-in-fact, each share of the
capital stock having voting power held by such stockholder in accordance with
the provisions of the Restated Certificate of Incorporation and, if applicable,
the certificate of designations relating thereto, but no proxy shall be voted or
acted upon after three years from its date, unless the proxy provides for a
longer period.

                   Section 11. Any action required to be taken at any annual or
special meeting of stockholders of the Corporation, or any action which may be
taken at any annual or special meeting of such stockholders, may be taken
<PAGE>

                                        6

without a meeting, without prior notice and without a vote, if a consent in
writing, setting forth the action so taken, shall be signed by stockholders
representing not less than the minimum number of votes that would be necessary
to authorize or take such actions at a meeting at which all shares entitled to
vote thereon were present and voted. Prompt notice of the taking of such action
without a meeting by less than unanimous written consent shall be given to those
stockholders who have not consented in writing. The Secretary shall file such
consents with the minutes of the meetings of the stockholders.

                   Section 12. At all meetings of stockholders, the chairman of
the meeting shall have absolute authority over matters of procedure, and there
shall be no appeal from the ruling of the chairman.

                   Section 13. Attendance of a stockholder, in person or by
proxy, at any meeting shall constitute a waiver of notice of such meeting,
except where the stockholder, in person or by proxy, attends a meeting for the
express purpose of objecting to the transaction of any business because the
meeting is not lawfully called or convened.
<PAGE>

                                        7

                                   ARTICLE III

                                    DIRECTORS


                   Section 1. The number of directors which shall constitute the
entire Board of Directors shall be fixed as set forth in Article XIII of the
Restated Certificate of Incorporation, and shall not be less than three nor more
than eighteen. Directors shall have such qualifications as may be prescribed by
these by-laws. Directors need not be stockholders. If required by regulations of
the Federal Communications Commission, each director shall be a citizen of the
United States of America

                   Section 2. Subject to the rights of the holders of any series
of Preferred Stock or any other class of capital stock of the corporation then
outstanding (other than the Common Stock), and subject to Article XIII of the
Restated Certificate of Incorporation, vacancies in the board of directors for
any reason, including by reason of an increase in the authorized number of
directors, shall, if occurring prior to the expiration of the term of office in
which the vacancy occurs, be filled by a majority of the directors then in
office, though less than a quorum, or by a sole remaining director, and the
directors so chosen shall hold office until the next annual meeting of
stockholders of the Corporation or until their successors are duly elected and
shall qualify, unless sooner displaced. Subject to
<PAGE>

                                        8

Article XIII of the Restated Certificate of Incorporation, if there are no
directors in office, then an election of directors may be held in the manner
provided by statute.

                   Section 3. The property and business of the Corporation shall
be controlled and managed in accordance with the terms of the Restated
Certificate of Incorporation by its board of directors which may, subject to
Article XIII of the Restated Certificate of Incorporation, exercise all such
powers of the Corporation and do all such lawful acts and things as are not by
statute or by the Restated Certificate of Incorporation or by these by-laws
directed or required to be exercised or done by the stockholders.

                       MEETINGS OF THE BOARD OF DIRECTORS


                   Section 4. The board of directors of the Corporation, or any
committees thereof, may hold meetings, both regular and special, either within
or without the State of Delaware.

                   Section 5. A regular annual meeting of the board of
directors, including newly elected directors, shall be held immediately after
each annual meeting of stockholders at the place of such stockholders' meeting,
and no notice of such meeting to the directors shall be necessary in order
legally to constitute the meeting, provided a quorum shall be present. If such
meeting is held at any other time or
<PAGE>

                                        9

place, notice thereof must be given or waived as hereinafter provided for
special meetings of the board of directors.

                   Section 6. Additional regular meetings of the board of
directors shall be held on such dates and at such times and at such places as
shall from time to time be determined by the board of directors.

                   Section 7. The Chairman of the Board, the Chief Executive
Officer, Vice Chairman of the Board or the President and Chief Operating Officer
of the Corporation and the Secretary may call a special meeting of the board of
directors at any time by giving notice, specifying the business to be transacted
at and the purpose or purposes of the meeting, to each member of the board at
least twenty-four (24) hours before the time appointed.

                   Section 8. At all meetings of the board a majority of the
full board of directors shall constitute a quorum for the transaction of
business and the act of a majority of the directors present at any meeting at
which there is a quorum shall be the act of the board of directors, except as
may be otherwise specifically provided by statute, the Restated Certificate of
Incorporation or these by-laws. If a quorum shall not be present at any meeting
of the board of directors, the directors present thereat may adjourn the meeting
from time to time, without
<PAGE>

                                       10

notice other than announcement at the meeting, until a quorum shall be present.

                   Section 9. Any action required or permitted to be taken at
any meeting of the board of directors or of any committee thereof may be taken
without a meeting if all members of the board or committee, as the case may be,
consent thereto in writing, setting forth the action so taken, and the writing
or writings are filed with the minutes of proceedings of the board or committee.

                   Section 10. Unless otherwise restricted by the Restated
Certificate of Incorporation or these by-laws, members of the board of
directors, or any committee thereof, may participate in a meeting of the board
of directors, or any committee, by means of conference telephone or similar
communications equipment whereby all persons participating in the meeting can
hear each other, and such participation in a meeting shall constitute presence
in person at the meeting.

                             COMMITTEES OF DIRECTORS


                   Section 11. Designation of Committees. Subject to Article
XIII of the Restated Certificate of Incorporation, the board of directors may,
by resolution passed by a majority of the whole board, designate one or more
committees, each committee to consist of one or more of
<PAGE>

                                       11

the directors of the Corporation. Subject to Article XIII of the Restated
Certificate of Incorporation, the board of directors may designate one or more
directors as alternate members of any committee, who may replace any absent or
disqualified member at any meeting of the committee.

                   Section 12. Vacancies. Subject to Article XIII of the
Restated Certificate of Incorporation, in the absence or disqualification of a
member of a committee, the member or members thereof present at any meeting and
not disqualified from voting, whether or not he or they constitute a quorum, may
unanimously appoint another member of the board of directors to act at the
meeting in the place of any such absent or disqualified member.

                   Section 13. Powers. Subject to Article XIII of the Restated
Certificate of Incorporation, any such committee, to the extent provided in the
resolution of the board of directors, shall have and may exercise all the powers
and authority of the board of directors to the extent provided by Section 141(c)
of the General Corporation Law of the State of Delaware as it exists now or may
hereafter be amended.

                   Section 14. Each committee of the board of directors shall
keep regular minutes of its meetings and report the same to the board of
directors when required.
<PAGE>

                                       12


                            COMPENSATION OF DIRECTORS


                   Subject to Article XIII of the Restated Certificate of
Incorporation:

                   Section 15. Unless otherwise restricted by the Restated
Certificate of Incorporation or these by-laws, the board of directors shall have
the authority to fix the compensation of directors. All directors may be paid
their expenses, if any, of attendance at each meeting of the board of directors,
and directors who are not full-time employees of the Corporation may be paid a
fixed sum for attendance at each meeting of the board of directors and/or a
stated salary as director. No such payment shall preclude any director from
serving the Corporation in any other capacity and receiving compensation
therefor. Members of special or standing committees may be allowed like
compensation and expenses for attending committee meetings.

                              REMOVAL OF DIRECTORS


                   Subject to Article XIII of the Restated Certificate of
Incorporation:

                   Section 16. Subject to the rights of the holders of any
series of Preferred Stock or any other class of capital stock of the Corporation
(other than the Common Stock) then outstanding, (a) any director, or the entire
<PAGE>

                                       13

board of directors, may be removed from office at any time prior to the
expiration of his term of office, with or without cause, only by the affirmative
vote of the holders of record of outstanding shares representing at least a
majority of all of the aggregate voting power of outstanding shares of capital
stock of the Corporation then entitled to vote generally in the election of
directors, voting together as a single class at a special meeting of
stockholders called expressly for that purpose; provided that, any director may
be removed from office by the affirmative vote of a majority of the entire board
of directors, at any time prior to the expiration of his term of office, as
provided by law, in the event a director fails to meet the qualifications stated
in these by-laws for election as a director or in the event such director is in
breach of any agreement between such director and the Corporation relating to
such director's service as a director or employee of the Corporation.

                          INDEMNIFICATION OF DIRECTORS

                   Section 17. The Corporation shall have the right to indemnify
directors, officers and agents of the Corporation to the fullest extent
permitted by the General Corporation Law of Delaware and by the Restated
Certificate of Incorporation, as both may be amended from time to time.
<PAGE>

                                       14


                                   ARTICLE IV
                                     NOTICES

                   Section 1. Whenever, under the provisions of applicable law
or of the Restated Certificate of Incorporation or of these by-laws, notice is
required to be given to any director or stockholder, it shall be construed to
mean written or printed notice given either personally or by mail or wire
addressed to such director or stockholder, at his address as it appears on the
records of the Corporation, with postage or other charges thereon prepaid, and
such notice shall be deemed to be given at the time when the same shall be
deposited in the United States mail or at the appropriate office for
transmission by wire. Notice to directors may also be given by telephone.

                   Section 2. Whenever any notice is required to be given under
the provisions of applicable law or of the Restated Certificate of Incorporation
or of these by-laws, a waiver thereof in writing, signed by the person or
persons entitled to said notice, whether before or after the time stated
therein, shall be deemed equivalent thereto.

                   Section 3. Attendance at a meeting shall constitute a waiver
of notice except where a director or shareholder attends a meeting for the
express purpose of
<PAGE>

                                       15

objecting to the transaction of any business because the meeting is not lawfully
called or convened.

                   Section 4. Neither the business to be transacted at, nor the
purpose of, any regular meeting of the board of directors need be specified in
the notice or waiver of notice of such meeting.

                                    ARTICLE V
                                    OFFICERS

                   Subject to Article XIII of the Restated Certificate of
Incorporation:

                   Section 1. The officers of the Corporation shall be elected
by the board of directors at its first meeting after each annual meeting of the
stockholders and shall be a President and Chief Operating Officer, a Treasurer
and a Secretary. The board of directors may also elect a Chairman of the Board,
a Chief Executive Officer, one or more Vice Chairmen of the Board and Vice
Presidents and one or more Assistant Treasurers and Assistant Secretaries. Any
number of offices may be held by the same person, except that the offices of
President and Chief Operating Officer and Secretary shall not be held by the
same person. Vice Presidents may be given distinctive designations such as
Executive Vice President or Senior Vice President. Every officer shall be a
citizen of the United States of America.
<PAGE>

                                       16


                   Section 2. The board of directors may elect such other
officers and agents as it shall deem necessary who shall hold their offices for
such terms and shall exercise such powers and perform such duties as shall be
determined from time to time by the board of directors.

                   Section 3. The officers of the Corporation shall hold office
until their successors are elected or appointed and qualify or until their
earlier resignation or removal. Any officer elected or appointed by the board of
directors may be removed at any time with or without cause by the affirmative
vote of a majority of the whole board of directors. Any vacancy occurring in any
office of the Corporation shall be filled by the board of directors.

                              CHAIRMAN OF THE BOARD


                   Section 4. The Chairman of the Board, if any shall be
elected, shall preside at all meetings of the board of directors and the
stockholders and shall have such other powers and perform such other duties as
may from time to time be assigned to him by the board of directors.

                           VICE CHAIRMAN OF THE BOARD


                   Section 5. The Vice Chairman of the Board, if any shall be
elected, or if there be more than one, the Vice Chairmen of the Board in order
of their election, shall, in
<PAGE>

                                       17

the absence of the Chairman of the Board, or in the case the Chairman of the
Board shall resign, retire, become deceased or otherwise cease or be unable to
act, perform the duties and exercise the powers of the Chairman of the Board. In
addition, the Vice Chairman of the Board shall have such other powers and
perform such other duties as may from time to time be assigned to him by the
board of directors.

                           THE CHIEF EXECUTIVE OFFICER

                   Section 6. The Chief Executive Officer shall be responsible,
in consultation with the President and Chief Operating Officer, for corporate
policy and strategy. The President and Chief Operating Officer shall consult on
all major decisions with, and shall report directly to, the Chief Executive
Officer; provided, however, that the Chief Executive Officer shall not exercise
any powers, rights, functions or responsibilities of the President and Chief
Operating Officer unless Mel Karmazin is the Chief Executive Officer.

                    THE PRESIDENT AND CHIEF OPERATING OFFICER

                   Section 7. Subject to Article XIII of the Restated
Certificate of Incorporation and to the requirement that the President and Chief
Operating Officer consult with the Chief Executive Officer on all major
decisions, the
<PAGE>

                                       18

President and Chief Operating Officer shall be responsible for:

                            (i)  supervising, coordinating and managing
                   the Corporation's business, operations and
                   activities, operating expenses and capital
                   allocation;

                            (ii) matters relating to officers (other than the
                   Chairman, the Chief Executive Officer and the President and
                   Chief Operating Officer) and employees, including, without
                   limitation, hiring, terminating, changing positions and
                   allocation of responsibilities of such officers and
                   employees;

                            (iii) substantially all of the powers, rights,
                   functions and responsibilities typically exercised
                   by a chief operating officer; and

                            (iv) all officers (other than the Chairman, the
                   Chief Executive Officer and the President and Chief Operating
                   Officer) will report, directly or indirectly, to the
                   President and Chief Operating Officer.

                               THE VICE-PRESIDENTS

                   Section 8. The Vice-Presidents shall have such powers and
perform such duties as may from time to time be assigned to them by the board of
directors or the President and Chief Operating Officer.
<PAGE>

                                       19


                      THE SECRETARY AND ASSISTANT SECRETARY


                   Section 9. The Secretary shall attend all meetings of the
board of directors and all meetings of the stockholders and record all the
proceedings of the meetings of the Corporation and of the board of directors in
a book to be kept for that purpose and shall perform like duties for the
standing committees of the board of directors when required. He shall give, or
cause to be given, notice of all meetings of the stockholders and special
meetings of the board of directors, and shall perform such other duties as may
be prescribed by the board of directors or the President and Chief Operating
Officer, under whose supervision he shall be. He shall have custody of the
corporate seal of the Corporation and he, or an Assistant Secretary, shall have
authority to affix the same to any instrument requiring it and when so affixed,
it may be attested by his signature or by the signature of such Assistant
Secretary. The board of directors may give general authority to any other
officer to affix the seal of the Corporation and to attest the affixing by his
signature.

                   Section 10. The Assistant Secretary, if any shall be elected,
or if there be more than one, the Assistant
<PAGE>

                                       20

Secretaries in the order determined by the board of directors (or if there be no
such determination, then in the order of their election), shall, in the absence
of the Secretary or in the event of his inability or refusal to act, perform the
duties and exercise the powers of the Secretary and shall have such other powers
and perform such other duties as may from time to time be assigned to them by
the board of directors or the President and Chief Operating Officer.

                     THE TREASURER AND ASSISTANT TREASURERS


                   Section 11. The Treasurer, under the supervision of the
President and Chief Operating Officer, shall have charge of the corporate funds
and securities and shall keep or cause to be kept full and accurate accounts of
receipts and disbursements in books belonging to the Corporation and shall
deposit all moneys and other valuable effects in the name and to the credit of
the Corporation in such depositaries as may be designated by or at the direction
of the board of directors.

                   Section 12. The Treasurer shall disburse or cause to be
disbursed the funds of the Corporation as may be ordered by or at the direction
of the President and Chief Operating Officer or the board of directors, taking
proper vouchers for such disbursements, and subject to the
<PAGE>

                                       21

supervision of the President and Chief Operating Officer, shall render to the
board of directors, when they or either of them so require, an account of his
transactions as Treasurer and of the financial condition of the Corporation.

                   Section 13. If required by the board of directors, the
Treasurer shall give the Corporation a bond in such sum and with such surety or
sureties as shall be satisfactory to the board of directors for the faithful
performance of the duties of his office and for the restoration to the
Corporation, in case of his death, resignation, retirement or removal from
office, of all books, papers, vouchers, money and other property of whatever
kind in his possession or under his control belonging to the Corporation.

                   Section 14. The Assistant Treasurer, if any shall be elected,
or if there shall be more than one, the Assistant Treasurers in the order
determined by the board of directors (or if there be no such determination, then
in the order of their election), shall, in the absence of the Treasurer or in
the event of his inability or refusal to act, perform the duties and exercise
the powers of the Treasurer and shall have such other powers and perform such
other duties as may from time to time be assigned to them by the board of
directors.
<PAGE>

                                       22

                   Section 15. In addition to the corporate officers elected by
the board of directors pursuant to this Article V, the President and Chief
Operating Officer may, from time to time, appoint one or more other persons as
appointed officers who shall not be deemed to be corporate officers, but may,
respectively, be designated with such titles as the President and Chief
Operating Officer may deem appropriate. The President and Chief Operating
Officer may prescribe the powers to be exercised and the duties to be performed
by each such appointed officer, may designate the term for which each such
appointment is made, and may, from time to time, terminate any or all of such
appointments. Such appointments and termination of appointments shall be
reported to the board of directors.

                                   ARTICLE VI
                              CERTIFICATES Of STOCK

                   Section 1. Every holder of shares of capital stock in the
Corporation shall be entitled to have a certificate sealed with the seal of the
Corporation and signed by, or in the name of the Corporation by, the Chairman of
the Board, the Chief Executive Officer, Vice Chairman of the Board or the
President and Chief Operating Officer and by the Treasurer or an Assistant
Treasurer or the Secretary or an Assistant Secretary of the Corporation,
certifying the number of shares owned by him in the
<PAGE>

                                       23

Corporation. If the Corporation shall be authorized to issue more than one class
of stock or more than one series of any class, the designations, preferences and
relative, participating, optional or other special rights of each class of stock
or series thereof and the qualifications, limitations or restrictions of such
preferences and/or rights shall be set forth in full or summarized on the face
or back of the certificate which the Corporation shall issue to represent such
class or series of stock, provided that, except as otherwise provided in section
202 of the General Corporation Law of Delaware, in lieu of the foregoing
requirements, there may be set forth on the face or back of the certificate
which the Corporation shall issue to represent such class or series of stock, a
statement that the Corporation will furnish without charge to each stockholder
who so requests the designations, preferences and relative, participating,
optional or other special rights of each class of stock or series thereof and
the qualifications, limitations or restrictions of such preferences and/or
rights.

                   Section 2. Any or all of the signatures on the certificate
may be facsimile. In case any officer, transfer agent or registrar who has
signed or whose facsimile signature has been placed upon a certificate shall
have ceased to be such officer, transfer agent or registrar
<PAGE>

                                       24

before such certificate is issued, it may be issued by the Corporation with the
same effect as if he were such officer, transfer agent or registrar at the date
of issue.

                                LOST CERTIFICATES


                   Section 3. The board of directors may direct a new
certificate or certificates to be issued in place of any certificate or
certificates theretofore issued by the Corporation alleged to have been lost,
stolen or destroyed, upon the making of an affidavit of that fact by the person
claiming the certificate of capital stock to be lost, stolen or destroyed. When
authorizing such issue of a new certificate or certificates, the board of
directors may, in its discretion and as a condition precedent to the issuance
thereof, require the owner of such lost, stolen or destroyed certificate or
certificates, or his legal representative, to advertise the same in such manner
as it shall require and/or to give the Corporation a bond in such sum as it may
direct as indemnity against any claim that may be made against the Corporation
with respect to the certificate alleged to have been lost, stolen or destroyed.

                               TRANSFERS OF STOCK


                   Section 4.  Upon surrender to the Corporation or
the transfer agent of the Corporation of a certificate for
shares duly endorsed or accompanied by proper evidence of
<PAGE>

                                       25

succession, assignation or authority to transfer, it shall be the duty of the
Corporation to issue a new certificate to the person entitled thereto, cancel
the old certificate and record the transaction upon its books.

                               FIXING RECORD DATE


                   Section 5. In order that the Corporation may determine the
stockholders entitled to notice of or to vote at any meeting of stockholders or
any adjournment thereof, or to express consent to corporate action in writing
without a meeting, or entitled to receive payment of any dividend or other
distribution, or allotment of any rights, or entitled to exercise any rights in
respect of any change, conversion or exchange of stock or for the purpose of any
other lawful action, the board of directors may fix, in advance, a record date,
which shall not be more than sixty nor less than ten days before the date of
such meetings, nor more than sixty days prior to any other action. A
determination of stockholders of record entitled to notice of or to vote at a
meeting of stockholders shall apply to any adjournment of the meeting; provided,
however, that the board of directors may fix a new record date for the adjourned
meeting.
<PAGE>

                                       26

                             REGISTERED STOCKHOLDERS


                   Section 6. The Corporation shall be entitled to recognize the
exclusive right of a person registered on its books as the owner of shares to
receive dividends, and to vote as such owner, and to hold liable for calls and
assessments a person registered on its books as the owner of shares, and shall
not be bound to recognize any equitable or other claim to or interest in such
share or shares on the part of any other person, whether or not it shall have
express or other notice thereof, except as otherwise provided by the laws of
Delaware.

                                   ARTICLE VII
                               GENERAL PROVISIONS
                                    DIVIDENDS

                   Section 1. Dividends upon the capital stock of the
Corporation, subject to the provisions of the certificate of incorporation, if
any, may be declared by the board of directors at any regular or special
meeting, pursuant to law. Dividends may be paid in cash, in property or in
shares of the capital stock, subject to the provisions of any statute, the
Restated Certificate of Incorporation and these by-laws.

                   Section 2. Before payment of any dividend, there may be set
aside out of any funds of the Corporation
<PAGE>

                                       27

available for dividends such sum or sums as the directors from time to time, in
their absolute discretion, think proper as a reserve or reserves to meet
contingencies, or for equalizing dividends, or for repairing or maintaining any
property of the Corporation, or for such other purposes as the directors shall
think conducive to the interest of the Corporation, and the directors may modify
or abolish any such reserve in the manner in which it was created.

                                ANNUAL STATEMENT


                   Section 3. The board of directors shall present at each
annual meeting, and at any special meeting of the stockholders when called for
by vote of the stockholders, a full and clear statement of the business and
condition of the Corporation.

                                     CHECKS


                   Section 4. All checks or demands for money of the Corporation
shall be signed by such officer or officers or such other person or persons as
the board of directors may from time to time designate.

                                   FISCAL YEAR


                   Section 5. The fiscal year of the Corporation shall be as
specified by the board of directors.
<PAGE>

                                       28

                                      SEAL


                   Section 6. The corporate seal shall have inscribed thereon
the name of the Corporation, the year of its organization and the words
"Corporate Seal, Delaware". The seal may be used by causing it or a facsimile
thereof to be impressed or affixed or reproduced or otherwise.

                                    CONTRACTS


                   Section 7. An Officer of the Corporation may sign any note,
bond, or mortgage of the Corporation in furtherance of the Corporation's
ordinary business and in order to implement any action authorized by these
by-laws.

                                  ARTICLE VIII
                      RESTATED CERTIFICATE OF INCORPORATION

                   In addition to all other provisions of the Restated
Certificate of Incorporation, and notwithstanding that these by-laws may contain
any provision contrary thereto, these by-laws shall be subject in all respects
to Article XIII of the Restated Certificate of Incorporation.

                                   ARTICLE IX
                                   AMENDMENTS

                   In furtherance of and not in limitation of the powers
conferred by statute, the board of directors of the
<PAGE>

                                       29

Corporation from time to time may make, amend, alter, change or repeal the
by-laws of the Corporation; provided, that any by-laws made, amended, altered,
changed or repealed by the board of directors or the stockholders of the
Corporation may be amended, altered, changed or repealed, and that any by-laws
may be made, by the stockholders of the Corporation. Notwithstanding any other
provisions of the Restated Certificate of Incorporation of the Corporation or
these by-laws (and notwithstanding the fact that a lesser percentage may be
specified by law, the Restated Certificate of Incorporation or these by-laws),
the affirmative vote of not less than a majority of the aggregate voting power
of all outstanding shares of capital stock of the Corporation then entitled to
vote generally in this election of Directors, voting together as a single class,
shall be required for the stockholders of the Corporation to amend, alter,
change, repeal or adopt any by-laws of the Corporation.
<PAGE>

                                                                         ANNEX D

================================================================================






                                VOTING AGREEMENT


                                       By


                            NATIONAL AMUSEMENTS, INC.
                                  (Stockholder)

                                       and

                                 CBS CORPORATION




                          Dated as of September 6, 1999







================================================================================
<PAGE>

                                VOTING AGREEMENT


                   VOTING AGREEMENT, dated as of September 6, 1999 (this
"Agreement"), by NATIONAL AMUSEMENTS, INC., a Maryland corporation (the
"Stockholder"), to and for the benefit of CBS CORPORATION, a Pennsylvania
corporation ("CBS").

                   WHEREAS, as of the date hereof, the Stockholder owns of
record and beneficially 93,658,988 shares of Class A Common Stock (the "Viacom
Class A Common Stock"; such shares, together with any shares of Viacom Class A
Common Stock and any other shares of voting stock of Viacom acquired by the
Stockholder prior to the termination of this Agreement being referred to herein
as the "Stockholder's Shares"), par value $.01 per share, of VIACOM, INC., a
Delaware corporation ("Viacom");

                   WHEREAS, concurrently with the execution of this Agreement,
CBS and Viacom are entering into an Agreement and Plan of Merger, dated as of
the date hereof (the "Merger Agreement"; capitalized terms used and not
otherwise defined herein shall have the respective meanings assigned to them in
the Merger Agreement), pursuant to which, upon the terms and subject to the
conditions thereof, CBS will be merged with and into Viacom (the "Merger"); and

                   WHEREAS, as a condition to the willingness of Viacom and CBS
to enter into the Merger Agreement, CBS has requested the Stockholder to agree,
and in order to induce CBS to enter into the Merger Agreement, the Stockholder
is willing to agree, to vote in favor of the Viacom Proposals (as defined in the
Merger Agreement), upon the terms and subject to the conditions set forth
herein.

                   NOW, THEREFORE, in consideration of the foregoing and the
mutual covenants and agreements contained herein, and intending to be legally
bound hereby, the parties hereby agree as follows:

                   Section 1. Voting of Stockholder's Shares. Until the
termination of this Agreement in accordance with the terms hereof, the
Stockholder hereby agrees that, at the Viacom Stockholders' Meeting or any other
meeting of the stockholders of Viacom, however called, and in any action by
written consent of the stockholders of Viacom, the Stockholder will vote all of
the Stockholder's Shares (i) in favor of the Viacom Proposals and (ii) against
any action, proposal or agreement that would or could reasonably be expected to
result in a breach of any covenant, representation or warranty or any other
obligation or agreement of Viacom under the Merger Agreement or which would or
could reasonably be expected to result in any of the conditions to the Merger
Agreement not being fulfilled.

                   Section 2. No Inconsistent Agreements. The Stockholder hereby
covenants and agrees that, except as contemplated by this Agreement and the
Merger Agreement, the Stockholder shall not enter into any voting agreement or
grant a proxy or power of attorney with respect to the Stockholder's Shares
which is inconsistent with this Agreement.
<PAGE>

                                        2

                   Section 3. Transfer of Stockholder's Shares. The Stockholder
hereby covenants and agrees that the Stockholder shall not transfer record or
beneficial ownership of any of the Stockholder's Shares unless the transferee
unconditionally agrees in writing to be bound by the terms and conditions of
this Agreement.

                   Section 4. Representations and Warranties of Stockholder. The
Stockholder hereby represents and warrants to CBS as follows:

                   (a) Authority Relative to This Agreement. The Stockholder has
          all necessary power and authority to execute and deliver this
          Agreement, to perform its obligations hereunder and to consummate the
          transactions contemplated hereby. The execution and delivery of this
          Agreement by the Stockholder and the consummation by the Stockholder
          of the transactions contemplated hereby have been duly and validly
          authorized by the Board of Directors of the Stockholder, and no other
          corporate proceedings on the part of the Stockholder are necessary to
          authorize this Agreement or to consummate such transactions. This
          Agreement has been duly and validly executed and delivered by the
          Stockholder and, assuming the due authorization, execution and
          delivery by CBS, constitutes a legal, valid and binding obligation of
          the Stockholder, enforceable against the Stockholder in accordance
          with its terms.

                   (b) No Conflict. (i) The execution and delivery of this
          Agreement by the Stockholder do not, and the performance of this
          Agreement by the Stockholder shall not, (A) conflict with or violate
          the Certificate of Incorporation or By-laws or equivalent
          organizational documents of the Stockholder, (B) conflict with or
          violate any law, rule, regulation, order, judgment or decree
          applicable to the Stockholder or by which the Stockholder's Shares are
          bound or affected or (C) result in any breach of or constitute a
          default (or an event that with notice or lapse of time or both would
          become a default) under, or give to others any rights of termination,
          amendment, acceleration or cancellation of, or result in the creation
          of a lien or encumbrance on any of the Stockholder's Shares pursuant
          to, any note, bond, mortgage, indenture, contract, agreement, lease,
          license, permit, franchise or other instrument or obligation to which
          the Stockholder is a party or by which the Stockholder or the
          Stockholder's Shares are bound or affected, except, in the case of
          clauses (B) and (C), for any such conflicts, violations, breaches,
          defaults or other occurrences which would not prevent or delay the
          performance by the Stockholder of its obligations under this
          Agreement.

                   (ii) The execution and delivery of this Agreement by the
          Stockholder do not, and the performance of this Agreement by the
          Stockholder shall not, require any consent, approval, authorization or
          permit of, or filing with or notification to, any Governmental Entity
          except for applicable requirements, if any, of the Securities Exchange
          Act of 1934, as amended, and except where the failure to obtain such
          consents, approvals,
<PAGE>

                                        3

          authorizations or permits, or to make such filings or notifications,
          would not prevent or delay the performance by the Stockholder of its
          obligations under this Agreement.

                   (c) Title to the Shares. As of the date hereof, the
          Stockholder is the record and beneficial owner of 93,658,988 shares of
          Viacom Class A Common Stock. The Stockholder's Shares are all the
          voting securities of Viacom owned, either of record or beneficially,
          by the Stockholder. The Stockholder's Shares are owned free and clear
          of all security interests, liens, claims, pledges, options, rights of
          first refusal, agreements, limitations on the Stockholder's voting
          rights, charges and other encumbrances of any nature whatsoever. The
          Stockholder has not appointed or granted any proxy, which appointment
          or grant is still effective, with respect to the Stockholder's Shares.

                   Section 5. Termination. This Agreement shall terminate upon
the earlier to occur of (a) the Effective Time and (b) the termination of the
Merger Agreement in accordance with the terms thereof. No such termination of
this Agreement shall relieve any party hereto from any liability for any breach
of this Agreement prior to termination.

                   Section 6. Notices. All notices, requests, claims, demands
and other communications hereunder shall be in writing and shall be given or
made (and shall be deemed to have been duly given or made upon receipt) by
delivery in person, by facsimile, by courier service or by registered or
certified mail (postage prepaid, return receipt requested) to the respective
parties at the following addresses (or at such other address for a party as
shall be specified in a notice given in accordance with this Section 6):

                   if to the Stockholder:

                            National Amusements, Inc.
                            200 Elm Street
                            Dedham, Massachusetts 02026
                            Telecopier No.:  (781) 461-1412
                            Attention:  General Counsel

                   with a copy to:

                            Shearman & Sterling
                            599 Lexington Avenue
                            New York, New York 10022
                            Telecopier No.:  (212) 848-7179
                            Attention: Creighton O'M. Condon, Esq. and
                                       Stephen R. Volk, Esq.
<PAGE>

                                        4

                   if to CBS:

                            CBS Corporation
                            51 West 52nd Street
                            35th Floor
                            New York, New York 10019
                            Telecopier No.:  (212) 597-4031
                            Attention:  Louis J. Briskman, Esq.
                                        Executive Vice President and
                                        General Counsel

                   with copies to:

                            Cravath, Swaine & Moore
                            825 Eighth Avenue
                            New York, New York 10019
                            Telecopier No.:  (212) 474-3700
                            Attention:  Allen Finkelson, Esq. and
                                        Scott A. Barshay, Esq.

                   Section 7. Severability. If any term or other provision of
this Agreement is invalid, illegal or incapable of being enforced by any rule of
Law, or public policy, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of this Agreement is not affected in any manner materially
adverse to any party. Upon such determination that any term or other provision
is invalid, illegal or incapable of being enforced, the parties hereto shall
negotiate in good faith to modify this Agreement so as to effect the original
intent of the parties as closely as possible in a mutually acceptable manner in
order that the transactions contemplated by this Agreement be consummated as
originally contemplated to the fullest extent possible.

                   Section 8. Entire Agreement; Assignment. This Agreement and
the Merger Agreement constitute the entire agreement among the parties with
respect to the subject matter hereof and supersede all prior agreements and
undertakings, both written and oral, among the parties, or any of them, with
respect to the subject matter hereof. Neither this Agreement nor any of the
rights, interests or obligations under this Agreement shall be assigned, in
whole or in part, by operation of law or otherwise, by either of the parties
hereto without the prior written consent of the other party hereto. Any
purported assignment in violation of this Section 8 shall be void. Subject to
the preceding sentences of this Section 8, this Agreement will be binding upon,
inure to the benefit of, and be enforceable by, the parties hereto and their
respective successors and assigns.
<PAGE>

                                        5

                   Section 9. Parties in Interest; Certain Events. This
Agreement shall be binding upon and inure solely to the benefit of each party
hereto, and nothing in this Agreement, express or implied, is intended to or
shall confer upon any other person any right, benefit or remedy of any nature
whatsoever under or by reason of this Agreement. The Stockholder agrees that
this Agreement and the obligations hereunder shall attach to the Stockholder's
Shares and shall be binding upon any person or entity to which legal or
beneficial ownership of the Stockholder's Shares shall pass, whether by
operation of law or otherwise. In the event of any stock split, stock dividend,
merger, reorganization, recapitalization or other change in the capital
structure of Viacom affecting the capital stock of Viacom, or the acquisition of
additional shares of Viacom Class A Common Stock or other voting securities of
Viacom by the Stockholder, the number of Stockholder's Shares shall be adjusted
appropriately and this Agreement and the obligations hereunder shall attach to
any additional shares of Viacom Class A Common Stock or other voting securities
of Viacom issued to or acquired by the Stockholder.

                   Section 10. Specific Performance. The parties hereto agree
that irreparable damage would occur in the event any provision of this Agreement
was not performed in accordance with the terms hereof and that the parties shall
be entitled to specific performance of the terms hereof, in addition to any
other remedy at law or equity.

                   Section 11. Governing Law. This Agreement shall be governed
by and construed in accordance with the laws of the State of Delaware, without
regard to any principles of conflicts of laws of such State.

                   Section 12. Consent to Jurisdiction. (a) Each of the
Stockholder and CBS hereby irrevocably submits to the exclusive jurisdiction of
the courts of the State of Delaware and to the jurisdiction of the United States
District Court for the State of Delaware, for the purpose of any action or
proceeding arising out of or relating to this Agreement and each of CBS and the
Stockholder hereby irrevocably agrees that all claims in respect to such action
or proceeding shall be heard and determined exclusively in any Delaware state or
federal court. Each of CBS and the Stockholder agrees that a final judgment in
any action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.

                   (b) Each of CBS and the Stockholder irrevocably consents to
the service of the summons and complaint and any other process in any other
action or proceeding relating to the transactions contemplated by this
Agreement, on behalf of itself or its property, by personal delivery of copies
of such process to such party. Nothing in this Section 12 shall affect the right
of any party to serve legal process in any other manner permitted by law.

                   Section 13. Headings. The descriptive headings contained in
this Agreement are included for convenience of reference only and shall not
affect in any way the meaning or interpretation of this Agreement.
<PAGE>

                                        6

                   Section 14. Amendments. This Agreement may be amended or
modified, and the terms and conditions hereof may be waived, only by a written
instrument signed by the parties hereto or, in the case of a waiver, by each
party waiving compliance.

                   Section 15. Counterparts. This Agreement may be executed and
delivered (including by facsimile transmission) in one or more counterparts, and
by the different parties hereto in separate counterparts, each of which when
executed and delivered shall be deemed to be an original but all of which taken
together shall constitute one and the same agreement.

                   Section 16. WAIVER OF JURY TRIAL. EACH OF CBS AND THE
STOCKHOLDER HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION,
PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE)
ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE ACTIONS OF CBS AND THE
STOCKHOLDER IN THE NEGOTIATION, ADMINISTRATION, PERFORMANCE AND ENFORCEMENT
THEREOF.
<PAGE>

                   IN WITNESS WHEREOF, each of the parties hereto has caused
this Agreement to be executed as of the date first written above by their
respective officers thereunto duly authorized.

                                        NATIONAL AMUSEMENTS, INC.


                                        By  /s/ Sumner M. Redstone
                                          --------------------------------------
                                            Name:  Sumner M. Redstone
                                            Title: Chairman, President
                                                   & Chief Executive Officer


                                        CBS CORPORATION


                                        By  /s/ Fredric G. Reynolds
                                          --------------------------------------
                                            Name:  Fredric G. Reynolds
                                            Title: Executive Vice President,
                                                   Chief Financial Officer
<PAGE>

                                                                         ANNEX E

================================================================================











                              STOCKHOLDER AGREEMENT


                                       By


                            NATIONAL AMUSEMENTS, INC.
                                  (Stockholder)

                                       and

                                 CBS CORPORATION


                          Dated as of September 6, 1999









================================================================================
<PAGE>

                              STOCKHOLDER AGREEMENT


          STOCKHOLDER AGREEMENT, dated as of September 6, 1999 (this
"Agreement"), by NATIONAL AMUSEMENTS, INC., a Maryland corporation (the
"Stockholder"), to and for the benefit of CBS CORPORATION, a Pennsylvania
corporation ("CBS"), and its assigns by operation of law.

          WHEREAS, as of the date hereof, the Stockholder owns of record and
beneficially 93,658,988 shares of Class A Common Stock (the "Viacom Class A
Common Stock"; such shares, together with any shares of Viacom Class A Common
Stock and any other shares of voting stock of Viacom (together with the Viacom
Class A Common Stock, the "Voting Stock") acquired by the Stockholder during the
Specified Period (as defined in Section 1 of this Agreement) being collectively
referred to herein as the "Stockholder's Shares"), par value $.01 per share, of
VIACOM INC., a Delaware corporation ("Viacom");

          WHEREAS, concurrently with the execution of this Agreement, CBS and
Viacom are entering into an Agreement and Plan of Merger, dated as of the date
hereof (the "Merger Agreement"; capitalized terms used and not otherwise defined
herein shall have the respective meanings assigned to them in the Merger
Agreement), pursuant to which, upon the terms and subject to the conditions
thereof, CBS will be merged with and into Viacom (the "Merger"); and

          WHEREAS, as a condition to the willingness of Viacom and CBS to enter
into the Merger Agreement, CBS has requested the Stockholder to enter into this
Agreement.

          NOW, THEREFORE, in consideration of the foregoing and the mutual
covenants and agreements contained herein, and intending to be legally bound
hereby, the parties hereby agree as follows:

          Section 1.  Definitions.  As used in this Agreement, the following
terms shall have the following meanings:

          (a) "CBS Directors" shall mean (i) eight (8) of those directors
serving as members of the Board of Directors of CBS on the date of this
Agreement (or any Independent Directors elected or appointed prior to the
Effective Time to serve as a CBS Director) who are designated as such by the
Board of Directors of CBS prior to the Effective Time and (ii) any Replacement
CBS Director.

          (b) "Independent Director" shall mean a disinterested, independent
person (determined in accordance with customary standards for independent
directors applicable to U.S. public companies).

          (c) "Replacement CBS Director" shall mean a person qualifying as an
Independent Director and designated by a majority of the CBS Directors remaining
on the Board of Directors of Viacom to fill a seat on the Board of Directors of
Viacom vacated by a CBS Director or such a seat with respect to which a CBS
Director does not seek reelection.


                                        2
<PAGE>

          (d) "Specified Independent Directors" shall mean the directors of
Viacom first elected after 1993 and who are not management of Viacom or the
Stockholder (together with any replacements of such persons).

          (e) "Specified Period" shall mean the period of three years commencing
at the Effective Time.

          Section 2.  Covenants of the Stockholder.

          (a) The Stockholder shall cause to be nominated and elected each CBS
Director, including any Replacement CBS Director, so that there are eight CBS
Directors on the Board of Directors of Viacom at all times;

          (b) the Stockholder shall take all action necessary to ensure that any
seat on the Board of Directors of Viacom vacated by a CBS Director or such a
seat with respect to which a CBS Director elects not to seek reelection is
filled by a Replacement CBS Director immediately following the designation of
such person as such and notice thereof to the Stockholder;

          (c) the Stockholder shall take all action necessary to ensure that no
CBS Director is removed as a director of Viacom unless such removal is for cause
and is approved by at least 14 members of the Board of Directors of Viacom;

          (d) in the event that any Specified Independent Director shall resign,
vacate his directorship, fail to stand as a director, fail to be elected as a
director, or otherwise be removed as or for any reason cease to be a director of
Viacom, the Stockholder shall take all necessary action to cause such Specified
Independent Director to be replaced by an Independent Director; provided that
any such replacement Specified Independent Director shall be the chief executive
officer, chief operating officer or chief financial officer or former chief
executive officer of a Fortune 500 company or a non-U.S. public company of
comparable size;

          (e) unless approved by a vote of at least 14 members of the Board of
Directors of Viacom, the Stockholder shall not take any action to amend, modify
or repeal Article XIII of the Restated Certificate of Incorporation of Viacom
(in the form attached as Exhibit A-1 of the Merger Agreement) or Article VIII of
the By-laws of Viacom (in the form attached as Exhibit A-2 of the Merger
Agreement), or otherwise vote in favor of or take any action or fail to take any
action which would have the effect of eliminating, limiting, restricting,
avoiding or otherwise modifying the effect of any provision contained therein
(e.g., by creating a holding company structure if the certificate of
incorporation or similar document of such holding company does not contain
equivalent provisions). Without limiting the generality of the foregoing, the
Stockholder further agrees to take all necessary action to ensure that such
provisions shall be applicable to (i) any successor to Viacom as the result of a
merger, consolidation or other business combination, whether or not Viacom is
the surviving corporation in such transaction, or otherwise and (ii) any
corporation or other entity with respect to which Viacom or its successor is or
becomes a direct or indirect subsidiary, and the Stockholder shall take all
necessary action to ensure that Viacom shall not be a party to any transaction
which would not comply with the provisions of this paragraph (e) unless such
transaction is approved by a vote of at least 14 members of the Board of
Directors of Viacom;

          (f) the Stockholder shall take all necessary action, including without
limitation by voting and/or holding the Stockholder's Shares, to ensure that the
Stockholder or transferees

                                        3
<PAGE>

thereof (in accordance with Section 4 of this Agreement) owns, beneficially and
of record, on an outstanding and fully diluted basis, a majority of the shares
of Voting Stock, at all times (and refrain from taking any action that would
have the opposite result); and

          (g) each of the CBS Directors are intended third-party beneficiaries
of this Agreement and shall have the right to enforce the provisions of this
Agreement.

          Section 3. No Inconsistent Agreements. The Stockholder hereby
covenants and agrees that the Stockholder shall not enter into any voting
agreement or grant a proxy or power of attorney with respect to the
Stockholder's Shares which is inconsistent with this Agreement.

          Section 4. Transfer of Stockholder's Shares. The Stockholder hereby
covenants and agrees that the Stockholder shall not transfer record or
beneficial ownership of any of the Stockholder's Shares unless the transferee
unconditionally agrees in writing to be bound by the terms and conditions of
this Agreement.

          Section 5.  Representations and Warranties of Stockholder.  The
Stockholder hereby represents and warrants to CBS as follows:

          (a) Authority Relative to This Agreement. The Stockholder has all
     necessary power and authority to execute and deliver this Agreement, to
     perform its obligations hereunder and to consummate the transactions
     contemplated hereby. The execution and delivery of this Agreement by the
     Stockholder and the consummation by the Stockholder of the transactions
     contemplated hereby have been duly and validly authorized by the Board of
     Directors of the Stockholder, and no other corporate proceedings on the
     part of the Stockholder are necessary to authorize this Agreement or to
     consummate such transactions. This Agreement has been duly and validly
     executed and delivered by the Stockholder and, assuming the due
     authorization, execution and delivery by CBS, constitutes a legal, valid
     and binding obligation of the Stockholder, enforceable against the
     Stockholder in accordance with its terms.

          (b) No Conflict. (i) The execution and delivery of this Agreement by
     the Stockholder do not, and the performance of this Agreement by the
     Stockholder shall not, (A) conflict with or violate the Certificate of
     Incorporation or By-laws or equivalent organizational documents of the
     Stockholder, (B) conflict with or violate any law, rule, regulation, order,
     judgment or decree applicable to the Stockholder or by which the
     Stockholder's Shares are bound or affected or (C) result in any breach of
     or constitute a default (or an event that with notice or lapse of time or
     both would become a default) under, or give to others any rights of
     termination, amendment, acceleration or cancelation of or result in the
     creation of a lien or encumbrance on any of the Stockholder's Shares
     pursuant to, any note, bond, mortgage, indenture, contract, agreement,
     lease, license, permit, franchise or other instrument or obligation to
     which the Stockholder is a party or by which the Stockholder or the
     Stockholder's Shares are bound or affected, except, in the case of clauses
     (B) and (C), for any such conflicts, violations, breaches, defaults or
     other occurrences which would not prevent or delay the performance by the
     Stockholder of its obligations under this Agreement.

          (ii) The execution and delivery of this Agreement by the Stockholder
     do not, and the performance of this Agreement by the Stockholder shall not,
     require any consent, approval, authorization or permit of, or filing with
     or notification to, any Governmental

                                        4
<PAGE>

     Entity except for applicable requirements, if any, of the Securities
     Exchange Act of 1934, as amended, and except where the failure to obtain
     such consents, approvals, authorizations or permits, or to make such
     filings or notifications, would not prevent or delay the performance by the
     Stockholder of its obligations under this Agreement.

          (c) Title to the Shares. As of the date hereof, the Stockholder is the
     record and beneficial owner of 93,658,988 shares of Viacom Class A Common
     Stock. The Stockholder's Shares are all the voting securities of Viacom
     owned, either of record or beneficially, by the Stockholder. The
     Stockholder's Shares are owned free and clear of all security interests,
     liens, claims, pledges, options, rights of first refusal, agreements,
     limitations on the Stockholders voting rights, charges and other
     encumbrances of any nature whatsoever. The Stockholder has the sole right
     to vote and transfer the Stockholder's Shares, and the Stockholder has not
     appointed or granted any proxy, which appointment or grant is still
     effective, with respect to the Stockholder's Shares.

          Section 6. Effectiveness; Termination. This Agreement shall become
effective as of the date of this Agreement, provided that the Stockholder shall
have no obligation under Section 2(a), (b), (c) and (e) until the commencement
of the Specified Period. This Agreement shall terminate at the close of business
on the final day of the Specified Period.

          Section 7. Notices. All notices, requests, claims, demand and other
communications under this Agreement shall be in writing and shall be given or
made (and shall be deemed to have been duly given or made upon receipt) by
delivery in Person, by facsimile, by courier service or by registered or
certified mail (postage prepaid, return receipt requested) to the respective
parties at the following addresses (or at such other address for a party as
shall be specified in a notice given in accordance with this Section 7):

          if to Stockholder

          National Amusements, Inc.
          200 Elm Street
          Dedham, MA 02026
          Telecopier No.:  (781) 461-1412
          Attention:  General Counsel

          with copies to:

          Shearman & Sterling
          599 Lexington Avenue
          New York, Now York 10022
          Telecopier No.: (212) 848-7179
          Attention: Creighton O'M. Condon, Esq. and
                     Stephen R. Volk, Esq.


                                        5
<PAGE>

          if to CBS:

          CBS Corporation
          51 West 52nd Street
          35th Floor
          New York, New York 10019
          Telecopier No.: (212) 597-4031
          Attention: Louis J. Briskman, Esq.
                     Executive Vice President
                     and General Counsel

          with copies to:

          Cravath, Swaine & Moore
          825 Eighth Avenue
          New York, New York 10019
          Telecopier No.: (212) 474-3700
          Attention: Allen Finkelson, Esq. and
                     Scott A. Barshay, Esq.

          Section 8. Severability. If any term or other provision of this
Agreement is invalid, illegal or incapable of being enforced by any rule of Law,
or public policy, all other conditions and provisions of this Agreement shall
nevertheless remain in full force and effect so long as the economic or legal
substance of this Agreement is not affected in any manner materially adverse to
any party. Upon such determination that any term or other provision is invalid,
illegal or incapable of being enforced, the parties hereto shall negotiate in
good faith to modify this Agreement so as to effect the original intent of the
parties as closely as possible in a mutually acceptable manner in order that the
transactions contemplated by this Agreement be consummated as originally
contemplated to the fullest extent possible.

          Section 9. Entire Agreement; Assignment. This Agreement and the Merger
Agreement constitute the entire agreement among the parties with respect to the
subject matter hereof and supersede all prior agreements and undertakings, both
written and oral, among the parties, or any of them, with respect to the subject
matter hereof. Neither this Agreement nor any of the rights, interests or
obligations under this Agreement shall be assigned, in whole or in part, by
either of the parties hereto without the prior written consent of the other
party hereto, except that CBS may assign, its rights, interests and obligations
under this Agreement to Viacom by operation of law. Any purported assignment in
violation of this Section 9 shall be void.

          Section 10. Parties in Interest; Certain Events. This Agreement shall
be binding upon and inure solely to the benefit of each party hereto, and
nothing in this Agreement, express or implied, is intended to or shall confer
upon any other person any right, benefit or remedy of any nature whatsoever
under or by reason of this Agreement except as set forth in Section 2(g). The
Stockholder agrees that this Agreement and the obligations hereunder shall
attach to the Stockholder's Shares and shall be binding upon any person or
entity to which legal or beneficial ownership of the Stockholder's Shares shall
pass, whether by operation of law or otherwise, including the Stockholder's
heirs, guardians, administrators or successors. In the event of any stock split,
stock dividend, merger, reorganization, recapitalization or other change in the
capital structure of Viacom affecting the capital stock of Viacom, or the
acquisition of additional shares of Viacom Class A Common Stock or other voting
securities of Viacom by the Stockholder, the

                                        6
<PAGE>

number of Stockholder's Shares shall be adjusted appropriately and this
Agreement and the obligations hereunder shall attach to any additional shares of
Viacom Class A Common Stock or other voting securities of Viacom issued to or
acquired by the Stockholder.

          Section 11. Specific Performance. The parties hereto agree that
irreparable damage would occur in the event any provision of this Agreement was
not performed in accordance with the terms hereof and that the parties shall be
entitled to specific performance of the terms hereof, in addition to any other
remedy at law or equity.

          Section 12. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, without regard
to any principles of conflicts of laws of such State.

          Section 13. Consent to Jurisdiction. (a) Each of the Stockholder and
CBS hereby irrevocably submits to the exclusive jurisdiction of the courts of
the State of Delaware and to the jurisdiction of the United States District
Court for the State of Delaware, for the purpose of any action or proceeding
arising out of or relating to this Agreement and each of CBS and the Stockholder
hereby irrevocably agrees that all claims in respect to such action or
proceeding shall be heard and determined exclusively in any Delaware state or
federal court. Each of CBS and the Stockholder agrees that a final judgment in
any action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.

          (b) Each of CBS and the Stockholder irrevocably consents to the
service of the summons and complaint and any other process in any other action
or proceeding relating to the transactions contemplated by this Agreement, on
behalf of itself or its property, by personal delivery of copies of such process
to such party. Nothing in this Section 13 shall affect the right of any party to
serve legal process in any other manner permitted by law.

          Section 14. Headings. The descriptive headings contained in this
Agreement are included for convenience of reference only and shall not affect in
any way the meaning or interpretation of this Agreement.

          Section 15. Amendments. This Agreement may be amended or modified, and
the terms and conditions hereof may be waived, only (i) by a written instrument
signed by the parties hereto or, in the case of a waiver, by each party waiving
compliance and (ii) after the Effective Time if any such amendment or waiver is
concurred in by at least 14 members of the Board of Directors of Viacom.

          Section 16. Counterparts. This Agreement may be executed and delivered
(including by facsimile transmission) in one or more counterparts, and by the
different parties hereto in separate counterparts, each of which when executed
and delivered shall be deemed to be an original but all of which taken together
shall constitute one and the same agreement.

          Section 17. WAIVER OF JURY TRIAL. EACH OF CBS AND THE STOCKHOLDER
HEREBY IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION, PROCEEDING
OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR
RELATING TO THIS AGREEMENT OR THE ACTIONS OF CBS AND THE STOCKHOLDER IN THE
NEGOTIATION, ADMINISTRATION, PERFORMANCE AND ENFORCEMENT THEREOF.

                                        7
<PAGE>

          IN WITNESS WHEREOF, each of the parties hereto has caused this
Agreement to be executed as of the date first written above by their respective
officers thereunto duly authorized.


                                        NATIONAL AMUSEMENTS, INC.

                                           by  /s/  Sumner M. Redstone
                                             -----------------------------------
                                             Name:  Sumner M. Redstone
                                             Title: Chairman, President
                                                    & Chief Executive Officer



                                        CBS CORPORATION


                                           by  /s/ Fredric G. Reynolds
                                             -----------------------------------
                                             Name: Fredric G. Reynolds
                                             Title:Executive Vice President,
                                                   Chief Financial Officer


                                        8
<PAGE>

                                                                         ANNEX F




                                   VIACOM INC.


                                September 6, 1999


Sumner M. Redstone
The Carlyle Hotel
Suite 3201
35 East 76th Street
New York, New York 10021


Dear Mr. Redstone:

                  This is to confirm our agreement that, effective as of the
Effective Time (as defined in the Agreement and Plan of Merger (the "Merger
Agreement") between Viacom Inc. ("Viacom") and CBS Corporation ("CBS"), dated as
of the date hereof) (the "Effective Date"), you shall be paid the following
compensation by Viacom, in addition to any compensation, benefits and
perquisites you have heretofore received from Viacom.

                  As the sole compensation for services to be rendered by you in
all capacities to Viacom, its subsidiaries and affiliates, you will receive the
following compensation.

                  (a) Salary: For all the services rendered by you in any
capacity to Viacom, its subsidiaries and affiliates, Viacom agrees to pay you a
base salary at the rate of $1,000,000 per annum ("Salary"), payable in
accordance with Viacom's then effective payroll practices.

                  (b) Bonus Compensation: In addition to your Salary, you shall
be entitled to receive bonus compensation for each of the calendar years during
your employment with Viacom, determined and payable as follows ("Bonus"):

                  (i)      Your Bonus for each of the calendar years during your
                           employment with Viacom will be based upon a
                           measurement of performance against objectives in
                           accordance with Viacom's Short-Term Incentive Plan
                           and its Senior Executive Short-Term Incentive Plan,
                           as the same may be amended from time to time
                           (collectively, the "STIP"), which objectives shall be
                           no less favorable to you than the objectives used to
                           determine the amount of bonus payable to any other
                           executive of Viacom whose bonus is based in
<PAGE>

Sumner M. Redstone                      2                      September 6, 1999



                           whole or in part on corporate performance and who
                           participates in the STIP.

                  (ii)     Your Target Bonus and Maximum Bonus opportunity for
                           each calendar year (prorated for calendar year 2000
                           by multiplying such amount by a fraction, the
                           numerator of which is the number of days in 2000
                           following the Effective Date, and the denominator of
                           which is 365) during your employment with Viacom
                           shall be as follows:

                           Year              Target               Maximum
                           --------------    ----------------     -----------
                           2000              $5,000,000           $10,000,000

                           2001              $5,500,000           $11,000,000

                           2002              $6,050,000           $12,100,000

                           2003 and          $6,655,000           $13,310,000
                           thereafter

                  (iii)    Your Bonus for any calendar year shall be payable by
                           February 28 of the following year.

                  (c) Deferred Compensation: In addition to your Salary and
Bonus, you shall earn, in respect of calendar year 2000 and each calendar year
thereafter during your employment with Viacom, an additional amount ("Deferred
Compensation"), the payment of which (together with the return thereon as
provided in this paragraph (c)) shall be deferred until January of the first
calendar year following the year in which you cease to be an "executive officer"
of Viacom, as defined for purposes of the Securities Exchange Act of 1934, as
amended. The amount of Deferred Compensation for calendar year 2000 shall be
$2,000,000, prorated by multiplying such amount by a fraction, the numerator of
which is the number of days in 2000 following the Effective Date, and the
denominator of which is 365. The amount of Deferred Compensation for calendar
years 2001 through 2003 shall be subject to annual increases each January 1st,
commencing January 1, 2001, in an amount equal to 10% of the sum of your Salary
and Deferred Compensation for the preceding year. Deferred Compensation shall be
credited to a bookkeeping account maintained by Viacom on your behalf, the
balance of which account shall periodically be credited (or debited) with deemed
positive (or negative) return calculated in the same manner, and at the same
times, as the deemed return on your account under the excess 401(k) plan of
Viacom (as such plan may be amended from time to time) is determined or, if you
do not participate in such plan, with a return to be mutually agreed by the
Company and you. Viacom's obligation to pay the Deferred Compensation (including
the return thereon provided for in this paragraph (c)) shall be an unfunded
obligation to be satisfied from the general funds of Viacom.
<PAGE>

Sumner M. Redstone                     3                       September 6, 1999


                  (d) Grant: You will be awarded a grant (the "Grant") under
Viacom's 1997 Long-Term Management Incentive Plan (the "1997 LTMIP") of stock
options to purchase 2,000,000 shares of Viacom's Class B Common Stock, effective
as of the Effective Date, with an exercise price equal to the fair-market value
of Viacom's Class B Common Stock on the date of the Grant. The Grant shall vest
in three equal installments on the first, second and third anniversaries of the
Effective Date. Such stock options shall be subject to terms identical in all
material respects to those applicable to the grant to be made to Mr. Karmazin as
of the Effective Date.

                  If you agree with the foregoing terms, please execute this
letter in the space provided below and return a copy to the undersigned.


                                               VIACOM INC.


                                               By: /s/ Philippe P. Dauman
                                                   ------------------------
                                                   Philippe P. Dauman
                                                   Deputy Chairman



ACCEPTED AND AGREED:

/s/ Sumner M. Redstone
- ------------------------
Sumner M. Redstone
September 6, 1999
<PAGE>

                                                                         ANNEX G


                                   VIACOM INC.


                                September 6, 1999


Mel Karmazin
1 Central Park West
New York, New York 10023


Dear Mel:

                  Viacom Inc. ("Viacom"), having an address at 1515 Broadway,
New York, New York 10036, agrees to employ you and you agree to accept such
employment upon the following terms and conditions:

                  1. Term. The term of your employment hereunder shall commence
on the Effective Time (as defined in the Agreement and Plan of Merger between
Viacom and CBS Corporation ("CBS"), dated as of the date hereof (the "Merger
Agreement"), pursuant to which CBS shall merge with and into Viacom) (the
"Effective Date") and, unless terminated by Viacom or you pursuant to paragraph
8 hereof, shall continue through and until December 31, 2003. The period from
the Effective Date through December 31, 2003 shall hereinafter be referred to as
the "Employment Term," notwithstanding any earlier termination pursuant to
paragraph 9. In the event that the Merger Agreement is terminated or otherwise
abandoned, this Agreement shall be void ab initio.

                  2. Duties. During the Employment Term, you agree to devote
your entire business time, attention and energies to the business of Viacom and
its subsidiaries. This is not intended to prevent you from engaging in other
activities that do not conflict with or interfere with the performance of your
duties and responsibilities hereunder. You will be President and Chief Operating
Officer of Viacom reporting directly and solely to Sumner M. Redstone, the
Chairman of the Board and Chief Executive Officer of Viacom (the "Chairman"),
and, upon the termination of the Chairman's service as Chief Executive Officer
during the Employment Term, you shall be appointed the Chief Executive Officer.
You will perform such duties and have such responsibilities set forth in Article
XIII of the Amended and Restated Certificate of Incorporation of Viacom to be
effective as of the Effective Date (the "Certificate of Incorporation"), a copy
of which is attached hereto as Exhibit A. You will have such authority as is
necessary for the performance of your obligations hereunder. You shall serve as
a member of the Boards of Directors of Viacom and Circular. Your principal place
of business shall be at Viacom's headquarters in the New York City metropolitan
area and you shall not be required to relocate
<PAGE>

                                        2

outside of the New York City metropolitan area. You shall be entitled to
continue to serve on the corporate, charitable and educational boards of which
you are a member as of the date hereof.

                  3. Compensation. As the sole compensation for services to be
rendered by you during the Employment Term in all capacities to Viacom, its
subsidiaries and affiliates, you will receive the following compensation.

                  (a) Salary: For all the services rendered by you in any
capacity to Viacom, its subsidiaries and affiliates, Viacom agrees to pay you a
base salary at the rate of $1,000,000 per annum ("Salary"), payable in
accordance with Viacom's then effective payroll practices.

                  (b) Bonus Compensation: In addition to your Salary, you shall
be entitled to receive bonus compensation for each of the calendar years during
the Employment Term, determined and payable as follows ("Bonus"):

                  (i)   Your Bonus for each of the calendar years during the
                        Employment Term will be based upon a measurement of
                        performance against objectives in accordance with
                        Viacom's Short-Term Incentive Plan and its Senior
                        Executive Short-Term Incentive Plan, as the same may be
                        amended from time to time (collectively, the "STIP"),
                        which objectives shall be no less favorable to you than
                        the objectives used to determine the amount of bonus
                        payable to any other executive of Viacom whose bonus is
                        based in whole or in part on corporate performance and
                        who participates in the STIP.

                  (ii)  Your Target Bonus and Maximum Bonus opportunity for each
                        calendar year (prorated for calendar year 2000 by
                        multiplying such amount by a fraction, the numerator of
                        which is the number of days in 2000 following the
                        Effective Date, and the denominator of which is 365)
                        during the Employment Term shall be as follows:

                        Year              Target                    Maximum
                        ------------      --------------------      ------------
                        2000              $5,000,000                $10,000,000
                        2001              $5,500,000                $11,000,000
                        2002              $6,050,000                $12,100,000
                        2003              $6,655,000                $13,310,000

                  (iii) Your Bonus for any calendar year shall be payable by
                        February 28 of the following year (even if not during
                        the Employment Term).
<PAGE>

                                        3

                  (c) Deferred Compensation: In addition to your Salary and
Bonus, you shall earn, in respect of calendar year 2000 and each calendar year
during the Employment Term after 2000, an additional amount ("Deferred
Compensation"), the payment of which (together with the return thereon as
provided in this paragraph 3(c)) shall be deferred until January of the first
calendar year following the year in which you cease to be an "executive officer"
of Viacom, as defined for purposes of the Securities Exchange Act of 1934, as
amended. The amount of Deferred Compensation for calendar year 2000 shall be
$2,000,000, prorated by multiplying such amount by a fraction, the numerator of
which is the number of days in 2000 following the Effective Date, and the
denominator of which is 365. The amount of Deferred Compensation for calendar
years 2001 through 2003 shall be subject to annual increases each January 1st,
commencing January 1, 2001, in an amount equal to 10% of the sum of your Salary
and Deferred Compensation for the preceding year. Deferred Compensation shall be
credited to a bookkeeping account maintained by Viacom on your behalf, the
balance of which account shall periodically be credited (or debited) with deemed
positive (or negative) return calculated in the same manner, and at the same
times, as the deemed return on your account under the excess 401(k) plan of
Viacom (as such plan may be amended from time to time) is determined (it being
understood and agreed that if at any time during which the Deferred Compensation
remains payable your excess 401(k) account balance is distributed in full to
you, your Deferred Compensation account shall continue to be credited or debited
with a deemed return based on the investment portfolio in which your excess
401(k) account was notionally invested immediately prior to its distribution).
Viacom's obligation to pay the Deferred Compensation (including the return
thereon provided for in this paragraph 3(c)) shall be an unfunded obligation to
be satisfied from the general funds of Viacom.

                  (d) Grant: You will be awarded a grant (the "Grant") under
Viacom's 1997 Long-Term Management Incentive Plan (the "1997 LTMIP") of stock
options to purchase 2,000,000 shares of Viacom's Class B Common Stock (such
number to be adjusted for any stock split, stock dividend or other similar
transaction that would result in an adjustment under the terms of the 1997 LTMIP
if such options were granted on the date hereof), effective as of the Effective
Date, with an exercise price equal to the fair-market value of Viacom's Class B
Common Stock on the Effective Date. Except as provided herein, the Grant shall
be made in accordance with the standard terms of stock option awards under the
1997 LTMIP (a copy of the standard form of such stock option awards is attached
hereto as Exhibit B), shall vest in three equal installments on the first,
second and third anniversaries of the Effective Date and shall be for a ten-year
term. In the event you cease to be employed by the Company for any reason upon
the expiration of the Employment Term, you shall be able to exercise the Grant
for two years following such termination.
<PAGE>

                                       4

                  4.  Benefits.

                  (a) You shall be entitled to participate in such medical,
dental and life insurance, 401(k), pension and other plans as Viacom may have or
establish from time to time and in which any other Viacom executives are
eligible to participate. The foregoing, however, shall not be construed to
require Viacom to establish any such plans or to prevent the modification or
termination of such plans once established, and no such action or failure
thereof shall affect this Agreement; provided, however, that no modification of
any plans in which you participate shall be made which results in treating you
less favorably than other senior executives of Viacom. It is further understood
and agreed that all benefits (including without limitation, Viacom's Pension and
Excess Pension Plans, short term disability program, Long-Term Disability
program and any supplement thereto, life insurance and any applicable death
benefit) you may be entitled to as an employee of Viacom shall be based upon
your Salary and, your Deferred Compensation, as set forth in paragraphs 3(a) and
(c) hereof, and not upon any bonus compensation due, payable or paid to you
hereunder, except where the benefit plan expressly provides otherwise. In
addition, it is hereby expressly agreed that you shall retain all benefits that
you have accrued under any compensation and benefit plans of CBS. You shall be
entitled to four (4) weeks vacation.

                  (b) Viacom shall provide you with no less than Five Million
Dollars ($5,000,000) of term life insurance during the Employment Term. You
shall have the right to assign the policy for such life insurance to your spouse
or issue or to a trust or trusts primarily for the benefit of your spouse and/or
issue.

                  (c) In addition to the benefits described in paragraphs 4(a)
and (b) hereof, Viacom agrees that you shall be credited for service accrued or
deemed accrued prior to the Effective Date with CBS or any of its subsidiaries
or predecessors for all purposes under any employee benefit plans, programs or
arrangement established or maintained by Viacom or any of its subsidiaries;
provided, however that such crediting of service shall not operate to duplicate
any benefit or the funding of any such benefit.

                  (d) Notwithstanding anything herein to the contrary, if it is
determined that any payment or benefit provided to you (whether hereunder or
otherwise, and including any payments or benefits resulting from the
transactions contemplated by the Merger Agreement) would be subject to the
excise tax imposed by Section 4999 of the Code or any interest or penalties with
respect to such excise tax (such excise tax, together with any interest or
penalties thereon, is herein referred to as an "Excise Tax"), then you shall be
entitled to an additional cash payment (a "Gross-Up Payment") in an amount that
will place you in the same after-tax economic position that you would have
enjoyed if the Excise Tax had not applied to the payment. The amount of the
Gross-Up Payment shall be determined by Viacom's regular independent auditors.
No Gross-Up Payments shall be payable hereunder if Viacom's auditors determine
that
<PAGE>

                                       5

such payments are not subject to an Excise Tax. Viacom's auditors shall be
paid by Viacom for services performed hereunder.

                  5. Business Expenses. During the Employment Term, you shall be
reimbursed for such reasonable travel and other expenses incurred in the
performance of your duties hereunder as are customarily reimbursed to senior
executives of Viacom.

                  6. Perquisites. You shall be eligible for all perquisites made
available by Viacom from time to time during the Employment Term to other senior
executives of Viacom. Without limiting the generality of the foregoing, you
shall be entitled to (i) a car allowance and insurance in accordance with
Viacom's policy and (ii) use of a private airplane on a basis no less favorable
than as provided by CBS to you as of the date of execution of this Agreement,
or, if more beneficial to you, as provided by Viacom to any of its senior
executives.

                  7. Exclusive Employment, Confidential Information, Etc.

                  (a) Non-Competition. You agree that your employment hereunder
is on an exclusive basis, and that during the period of your employment
hereunder and, in the event during the Employment Term, of (x) a termination of
your employment pursuant to paragraph 9(a) hereof or (y) your resignation
without Good Reason, for a period of eighteen (18) months following the date of
such termination or resignation, as the case may be (the "Non-Compete Period"),
you will not engage in any other business activity which is in conflict with
your duties and obligations hereunder. You agree that during the Non-Compete
Period you shall not directly or indirectly engage in or participate as an
officer, employee, director, agent of or consultant for any business directly
competitive with that of Viacom, nor shall you make any investments in any
company or business competing with Viacom; provided, however, that nothing
herein shall prevent you from investing as less than a two (2%) percent
shareholder in the securities of any company listed on a national securities
exchange or quoted on an automated quotation system.

                  (b) Confidential Information. You agree that you shall not,
during the Employment Term or at any time thereafter, use for your own purposes,
or disclose to or for the benefit of any third party, any trade secret or other
confidential information of Viacom or any of its affiliates or predecessors
(except as may be required by law or in the performance of your duties hereunder
consistent with Viacom's policies) and that you will comply with any
confidentiality obligations of Viacom to a third party, whether under agreement
or otherwise. Notwithstanding the foregoing, confidential information shall be
deemed not to include information which (i) is or becomes generally available to
the public other than as a result of a disclosure by you or any other person who
directly or indirectly receives such information from you or at your direction
or (ii) is or becomes available to you on a non-confidential basis from a source
which is entitled to disclose it to you.
<PAGE>

                                       6

                  (c) No Employee Solicitation. You agree that, during the
Employment Term and for one (1) year thereafter, you shall not, directly or
indirectly, engage, employ, or solicit the employment of any person who is then
or has been within six (6) months prior thereto, an employee of Viacom or any of
Viacom's affiliates or predecessors.

                  (d) Viacom Ownership. The results and proceeds of your
services hereunder, including, without limitation, any works of authorship
resulting from your services during your employment with Viacom and/or any of
its affiliates or predecessors and any works in progress, shall be
works-made-for-hire and Viacom shall be deemed the sole owner throughout the
universe of any and all rights of whatsoever nature therein, whether or not now
or hereafter known, existing, contemplated, recognized or developed, with the
right to use the same in perpetuity in any manner Viacom determines in its sole
discretion without any further payment to you whatsoever. If, for any reason,
any of such results and proceeds shall not legally be a work-for-hire and/or
there are any rights which do not accrue to Viacom under the preceding sentence,
then you hereby irrevocably assign and agree to assign any and all of your
right, title and interest thereto, including, without limitation, any and all
copyrights, patents, trade secrets, trademarks and/or other rights of whatsoever
nature therein, whether or not now or hereafter known, existing, contemplated,
recognized or developed to Viacom, and Viacom shall have the right to use the
same in perpetuity throughout the universe in any manner Viacom determines
without any further payment to you whatsoever. You shall, from time to time, as
may be requested by Viacom, do any and all things which Viacom may deem useful
or desirable to establish or document Viacom's exclusive ownership of any and
all rights in any such results and proceeds, including, without limitation, the
execution of appropriate copyright and/or patent applications or assignments. To
the extent you have any rights in the results and proceeds of your services that
cannot be assigned in the manner described above, you unconditionally and
irrevocably waive the enforcement of such rights. This paragraph 7(d) is subject
to, and shall not be deemed to limit, restrict, or constitute any waiver by
Viacom of any rights of ownership to which Viacom may be entitled by operation
of law by virtue of Viacom or any of its affiliates or predecessors being your
employer.

                  (e) Litigation. You agree that, during the Employment Term,
for one (1) year thereafter and, if longer, during the pendancy of any
litigation or other proceeding, (i) you shall not communicate with anyone (other
than your own attorneys and tax advisors and, except to the extent required by
law or necessary in the performance of your duties hereunder) with respect to
the facts or subject matter of any pending or potential litigation, or
regulatory or administrative proceeding involving any of Viacom's affiliates or
predecessors, other than any litigation or other proceeding in which you are a
party-in-opposition, without giving prior notice to Viacom or Viacom's counsel,
and (ii) in the event that any other party attempts to obtain information or
documents from you with respect to matters possibly related to such litigation
or other proceeding, you shall promptly so notify Viacom's counsel unless you
are prohibited from doing so under applicable law.
<PAGE>

                                       7

                  (f) No Right to Write Books, Articles, Etc. During the
Employment Term, except as authorized by Viacom, you shall not prepare or assist
any person or entity in the preparation of any books, articles, television or
motion picture productions or other creations, concerning Viacom or any of
Viacom's affiliates or predecessors or any of their officers, directors, agents,
employees, suppliers or customers.

                  (g) Return of Property. All documents, data, recordings, or
other property, whether tangible or intangible, including all information stored
in electronic form, obtained or prepared by or for you and utilized by you in
the course of your employment with Viacom or any of its affiliates or
predecessors shall remain the exclusive property of Viacom. In the event of the
termination of your employment for any reason, Viacom reserves the right, to the
extent permitted by law and in addition to any other remedy Viacom may have, to
deduct from any monies otherwise payable to you the following: (i) the full
amount of any debt you owe to Viacom or any of its affiliates or predecessors at
the time of or subsequent to the termination of your employment with Viacom, and
(ii) the value of the Viacom property which you retain in your possession after
the termination of your employment with Viacom. In the event that the law of any
state or other jurisdiction requires the consent of an employee for such
deductions, this Agreement shall serve as such consent.

                  (h) Non-Disparagement. You and, to the extent set forth in the
next sentence, Viacom agree that each party shall not, during the Employment
Term and for one (1) year thereafter criticize, ridicule or make any statement
which disparages or is derogatory of the other party in any communications with
any customer or client. Viacom's obligations under the preceding sentence shall
be limited to communications by its senior corporate executives having the rank
of Senior Vice President or above.

                  (i) Injunctive Relief. Viacom has entered into this Agreement
in order to obtain the benefit of your unique skills, talent, and experience.
You acknowledge and agree that any violation of paragraphs 7(a) through (k)
hereof will result in irreparable damage to Viacom, and, accordingly, Viacom may
obtain injunctive and other equitable relief for any breach or threatened breach
of such paragraphs, in addition to any other remedies available to Viacom.

                  (j) Survival; Modification of Terms. Your obligations under
paragraphs 7(a) through (i) hereof shall remain in full force and effect for the
entire period provided therein notwithstanding the termination of the Employment
Term pursuant to paragraph 9 hereof or otherwise. You and Viacom agree that the
restrictions and remedies contained in paragraphs 7(a) through (k) are
reasonable and that it is your intention and the intention of Viacom that such
restrictions and remedies shall be enforceable to the fullest extent permissible
by law. If it shall be found by a court of competent jurisdiction that any such
restriction or remedy is unenforceable but would be enforceable if some part
thereof were deleted or the period or area of application reduced, then such
restriction or remedy shall apply with such modification as shall be necessary
to make it enforceable.
<PAGE>

                                       8

                  (k) No Selling of Viacom Stock without Board Consent. In
consideration of your employment hereunder, you hereunder agree that, except as
otherwise provided herein, during the period commencing on the date hereof and
ending on the third anniversary of the Effective Date, you shall not sell or
dispose of (nor exercise any limited rights or stock appreciation rights with
respect to) any shares of capital stock of CBS or Viacom held by you, your
immediate family members (which does not include your former spouse), or trusts
or other entities in which you or your immediate family members have a
controlling interest or are beneficiaries (together, the "Family Affiliates" and
each, a "Family Affiliate") that you or any Family Affiliate now hold, or in the
future may acquire, including, without limitation, shares that you or any Family
Affiliate receive pursuant to the transactions contemplated by the Merger
Agreement (whether in exchange for shares of CBS common stock or otherwise),
under any stock options or other equity-based compensation awards made to you by
CBS or by Viacom under this Agreement or under any other agreement awarding you
shares of capital stock of Viacom, without first obtaining the consent of (i) if
prior to the Effective Date, the Chairman, or (ii) if on or following the
Effective Date, fourteen of the eighteen members of the Board of Viacom. This
restriction shall lapse in the event that, during the Employment Term, you are
terminated without Cause, resign for Good Reason, die or become disabled.
Notwithstanding the foregoing, between the first anniversary of the Effective
Date and the second anniversary of the Effective Date you and the Family
Affiliates collectively may sell or dispose of a number of shares equal to up to
10% of the shares held by you and the Family Affiliates on the Effective Date
(including, for this purpose, the shares underlying any equity-based
compensation awards held by you on the Effective Date, but not shares underlying
any equity-based compensation awards granted to you pursuant to paragraph 3(d)
or at any time after the Effective Date). Between the second anniversary of the
Effective Date and the third anniversary of the Effective Date, you and the
Family Affiliates collectively may sell or dispose of a number of shares equal
to up to 10% of the shares held by you and the Family Affiliates on the second
anniversary of the Effective Date (including, for this purpose, the shares
underlying any equity-based compensation awards held by you on the Effective
Date, but not shares underlying any equity-based compensation awards granted to
you pursuant to paragraph 3(d) or at any time after the Effective Date), plus
any shares that were not sold or disposed of by you and the Family Affiliates
collectively under the prior year's limits. Notwithstanding the foregoing, you
may transfer shares to Family Affiliates, but such shares shall remain subject
to the restrictions contained in this paragraph 7(k).

                  8. Incapacity. In the event you become totally medically
disabled at any time during the Employment Term and are not expected to be able
to substantially perform your duties for a six (6) consecutive month period, the
Chairman, at any time after such disability has in fact continued for 60
consecutive days, may determine that Viacom requires such duties and
responsibilities be performed by another executive. In the event you become
disabled, you will first receive benefits under Viacom's short-term disability
program for the first 26 weeks of consecutive absence. Thereafter, you will be
eligible to receive benefits under Viacom's Long-Term Disability ("LTD") program
or any supplement thereto, in accordance with its terms.
<PAGE>

                                       9

Upon receipt of benefits under the LTD program you will also be entitled to
receive, subject to applicable withholding taxes:

                  (i)      a Target Bonus prorated for the portion of calendar
                           year through the date on which you become eligible to
                           receive benefits under the LTD program, payable at
                           the time that the Bonus for such calendar year would
                           otherwise be paid;

                  (ii)     prorated Deferred Compensation for the calendar year
                           in which such benefits commence and Deferred
                           Compensation attributable to prior calendar years,
                           payable, together with the return thereon as provided
                           in paragraph 3(c), prior to January 31 of the
                           calendar year following the calendar year in which
                           such benefits commence;

                  (iii)    stock options granted to you under the 1997 LTMIP
                           which are exercisable on or prior to the date as of
                           which benefits commence under the LTD program or that
                           would have vested and become exercisable on or before
                           the last day of the Employment Term will be
                           exercisable for two (2) years after the date as of
                           which such benefits commence or, if later, until
                           December 31, 2003, but in no event may such stock
                           options be exercised following the expiration date of
                           such stock options; and

In the event that you thereafter become able to substantially perform your
duties, you will then be entitled to receive from Viacom your Salary and
Deferred Compensation at the rate being paid to you immediately prior to the
commencement of such disability, and your Bonus calculated pursuant to paragraph
3(b) hereof, through the remainder of the Employment Term reduced by any
employment compensation earned by you for any work or service performed for any
other person.

                  9. Termination.

                  (a) Termination for Cause. Viacom may, at its option,
terminate your employment under this Agreement forthwith for "cause", and Viacom
shall thereafter have no further obligations under this Agreement, including,
without limitation, any obligation to pay Salary or Bonus or provide benefits
under this Agreement; provided, however, that Viacom may terminate this
Agreement pursuant to this paragraph only with the affirmative vote of fourteen
of the eighteen members of the Board of Viacom at a meeting called for such
purpose at which you and a counsel of your choosing shall have an opportunity to
be heard. For purposes of this Agreement, termination of this Agreement for
"cause" shall mean termination for embezzlement, fraud or other conduct which
would constitute a felony, conviction of a felony, or willful unauthorized
disclosure of confidential information, or if you at any time materially breach
this Agreement (including, without limitation, your failure, neglect of or
refusal to substantially
<PAGE>

                                       10

perform your obligations hereunder as set forth in paragraphs 2, 7(k) and 12
hereof), except in the event of your disability as set forth in paragraph 8.
Anything herein to the contrary notwithstanding, Viacom will give you written
notice prior to terminating this Agreement for your material breach setting
forth the exact nature of any alleged breach and the conduct required to cure
such breach. Except for a breach which by its nature cannot be cured, you shall
have ten (10) business days from the giving of such notice within which to cure
and within which period Viacom cannot terminate this Agreement for the stated
reasons.

                  (b) Good Reason Termination. You may terminate your employment
hereunder for "Good Reason" at any time during the Employment Term by written
notice to Viacom not more than thirty (30) days after the occurrence of the
event constituting "Good Reason". Such notice shall state an effective date no
earlier than thirty (30) business days after the date it is given. Viacom shall
have ten (10) business days from the giving of such notice within which to cure.
Good Reason shall mean any of the following, without your prior written consent,
other than in connection with the termination of your employment for "cause" (as
defined above) or in connection with your permanent disability:

                  (i)      the assignment to you by Viacom of duties
                           substantially inconsistent with your positions,
                           duties, responsibilities, titles or offices, the
                           withdrawal of a material part of your
                           responsibilities or a change in your reporting
                           relationship, as set forth in paragraph 2 or in
                           Article XIII of the Certificate of Incorporation as
                           in effect on the Effective Date;

                  (ii)     a reduction by Viacom in your Salary or Target Bonus
                           as in effect at the date hereof or as the same may be
                           increased from time to time during the Employment
                           Term;

                  (iii)    Viacom's requiring you to be based anywhere other
                           than the New York City metropolitan area, except for
                           required travel on Viacom's business to any extent
                           substantially consistent with business travel
                           obligations of other senior executives of Viacom;

                  (iv)     Viacom's violation of Article XIII of the Certificate
                           of Incorporation; or

                  (v)      the material breach by Viacom of its obligations
                           hereunder.

                  (c) Termination Without Cause. Viacom may terminate your
employment under this Agreement without "cause" (as defined above) at any time
during the Employment Term by written notice to you; provided, however, that
Viacom may terminate your employment pursuant to this paragraph only with the
affirmative vote of fourteen of the eighteen members of the Board of Viacom.
<PAGE>

                                       11

                  (d) Termination Payments, Etc. In the event that your
employment terminates pursuant to paragraph 9(b) or 9(c) hereof, you shall be
entitled to receive, subject to applicable withholding taxes:

                  (i)      your Salary as provided in paragraph 3(a) until the
                           end of the Employment Term, payable in accordance
                           with Viacom's then effective payroll practices;

                  (ii)     bonus compensation for each calendar year during the
                           Employment Term equal to your Target Bonus as set
                           forth in paragraph 3(b);

                  (iii)    Deferred Compensation for each calendar year during
                           the Employment Term as set forth in paragraph 3(c);
                           Deferred Compensation attributable to the calendar
                           year in which the termination pursuant to paragraph
                           9(b) or 9(c) hereof occurs and to prior calendar
                           years shall be payable, together with the return
                           thereon as provided in paragraph 3(c), prior to
                           January 31 of the calendar year following such
                           termination; and Deferred Compensation attributable
                           to subsequent calendar years shall be payable,
                           together with the return thereon as provided in
                           paragraph 3(c), prior to January 31 of each such
                           following calendar year;

                  (iv)     your perquisites as provided in paragraph 6 until the
                           end of the Employment Term, payable in accordance
                           with Viacom's then effective payroll practices;

                  (v)      medical and dental insurance coverage until the end
                           of the Employment Term or, if earlier, the date on
                           which you become eligible for medical and dental
                           coverage from a third party employer; during this
                           period, Viacom will pay an amount equal to the
                           applicable COBRA premiums (or such other amounts as
                           may be required by applicable law) (which amount will
                           be included in your income for tax purposes to the
                           extent required by applicable law); at the end of
                           such period, you may elect to continue your medical
                           and dental insurance coverage at your own expense for
                           the balance, if any, of the period required by law;

                  (vi)     life insurance coverage as set forth in paragraph
                           4(b) until the end of the Employment Term (the amount
                           of such insurance to be reduced by the amount of any
                           insurance provided by a new employer without cost to
                           you);

                  (vii)    stock options granted to you under the 1997 LTMIP
                           which are exercisable on or prior to the date of the
                           termination of your employment under paragraph 9(b)
                           or 9(c) or that would have vested and become
                           exercisable
<PAGE>

                                       12

                           on or before the last day of the Employment Term will
                           be exercisable for two (2) years after the date of
                           such termination or, if later, until December 31,
                           2003, but in no event may such stock options be
                           exercised following the expiration date of such stock
                           options;

                  (viii)   a supplemental pension benefit calculated in
                           accordance with the terms of the Excess Pension Plan
                           and paragraph 4(c) as though you were employed
                           through the end of the Employment Term; and

                  (ix)     provision of an appropriate office and secretarial
                           assistance for up to six (6) months after the
                           termination of your employment.

The payments provided for in (i) above are in lieu of any severance or income
continuation or protection under any Viacom plan that may now or hereafter
exist. The payments and benefits to be provided pursuant to this paragraph 9(d)
shall constitute liquidated damages, and shall be deemed to satisfy and be in
full and final settlement of all obligations of Viacom to you under this
Agreement.

                  (e) Termination of Benefits. Notwithstanding anything in this
Agreement to the contrary (except as otherwise provided in paragraph 9(d) with
respect to medical, dental and life insurance and Excess Pension Plan benefits
or in paragraphs 7 and 8 with respect to continued exercisability of options),
coverage under all Viacom benefit plans and programs (including, without
limitation, vacation, 401(k), excess 401(k) and pension plans, LTD and
accidental death and dismemberment and business travel and accident insurance)
will terminate upon the termination of your employment except to the extent
otherwise expressly provided in such plans or programs.

                  10. Death. If you die prior to the end of the Employment Term,
your beneficiary or estate shall be entitled to receive your Salary up to the
date on which the death occurs, a pro-rated Target Bonus and pro-rated Deferred
Compensation for the calendar year in which the death occurs and Deferred
Compensation attributable to prior calendar years payable, together with the
return thereon as provided in paragraph 3(c), prior to January 31 of the
following calendar year. In addition, the vesting of all stock options granted
under the 1997 LTMIP that are not exercisable as of the date on which the death
occurs shall be accelerated, and your beneficiary or estate shall be entitled to
exercise such stock options, together with all stock options that are
exercisable as of the date of your death, for two (2) years after the date of
death or, if later, until December 31, 2003, but in no event may such stock
options be exercised following the expiration date of such stock options.

                  11. Section 317 and 507 of the Federal Communications Act. You
represent that you have not accepted or given nor will you accept or give,
directly or indirectly, any money, services or other valuable consideration from
or to anyone other than Viacom for the inclusion of
<PAGE>

                                       13

any matter as part of any film, television program or other production produced,
distributed and/or developed by Viacom and/or any of its affiliates or
predecessors.

                  12. Equal Opportunity Employer. You acknowledge that Viacom is
an equal opportunity employer. You agree that you will comply with Viacom
policies regarding employment practices and with applicable federal, state and
local laws prohibiting discrimination on the basis of race, color, creed,
national origin, age, sex or disability.

                  13. Indemnification.

                  (a) Viacom shall indemnify and hold you harmless, to the
maximum extent permitted by law and by the Certificate of Incorporation and/or
the Bylaws of Viacom, against judgments, fines, amounts paid in settlement of
and reasonable expenses incurred by you in connection with the defense of any
action or proceeding (or any appeal therefrom) in which you are a party by
reason of your position as President and Chief Operating Officer or any other
office you may hold with Viacom or its affiliates or by reason of any prior
positions held by you with Viacom or any of its affiliates or predecessors or
for any acts or omissions made by you in good faith in the performance of any of
your duties as an officer of Viacom.

                  (b) To the extent that Viacom maintains officers' and
directors' liability insurance, you will be covered under such policy.

                  14. Notices. All notices required to be given hereunder shall
be given in writing, by personal delivery or by mail at the respective addresses
of the parties hereto set forth above, or at such other address as may be
designated in writing by either party. Any notice given by mail shall be deemed
to have been given three days following such mailing.

                  15. Assignment. This is an Agreement for the performance of
personal services by you and may not be assigned by you or Viacom except that
Viacom may assign this Agreement to any affiliate of or any successor in
interest to Viacom.

                  16. New York Law, Etc. This Agreement and all matters or
issues collateral thereto shall be governed by the laws of the State of New York
applicable to contracts entered into and performed entirely therein. Any action
to enforce this Agreement shall be brought in the state or federal courts
located in the City of New York.

                  17. No Implied Contract. Nothing contained in this Agreement
shall be construed to impose any obligation on Viacom to renew this Agreement or
any portion thereof. The parties intend to be bound only upon execution of a
written agreement and no negotiation, exchange of draft or partial performance
shall be deemed to imply an agreement. Neither the continuation of employment
nor any other conduct shall be deemed to imply a continuing agreement upon the
expiration of this Agreement.
<PAGE>

                                       14

                  18. Entire Understanding. This Agreement contains the entire
understanding of the parties hereto relating to the subject matter herein
contained, and can be changed only by a writing signed by both parties hereto.

                  19. Void Provisions. If any provision of this Agreement, as
applied to either party or to any circumstances, shall be adjudged by a court to
be void or unenforceable, the same shall be deemed stricken from this Agreement
and shall in no way affect any other provision of this Agreement or the validity
or enforceability of this Agreement.


                  20. Supersedes Previous Agreement. Effective as of the
Effective Date, this Agreement shall supersede and cancel all prior agreements
relating to your employment by Viacom or any of its affiliates and predecessors,
including, without limitation, the employment agreement with Westinghouse
Electric Corporation, dated as of June 20, 1996, and any amendments thereto.
Notwithstanding the preceding sentence, this Agreement is not intended, and
shall not be construed, to affect your rights in any compensation or benefits
that have been granted or accrued prior to the beginning of the Employment Term.
<PAGE>

                                       15

                  If the foregoing correctly sets forth our understanding,
please sign one copy of this letter and return it to the undersigned, whereupon
this letter shall constitute a binding agreement between us.

                                         Very truly yours,

                                         VIACOM INC.


                                         By:  /s/ Michael D. Fricklas
                                              -------------------------------
                                              Michael D. Fricklas
                                              Senior Vice President, General
                                              Counsel and Secretary


ACCEPTED AND AGREED:

/s/ Mel Karmazin
- ----------------------
Mel Karmazin
<PAGE>

                                    EXHIBIT A

      Article XIII of the Amended and Restated Certificate of Incorporation

                                   (attached)
<PAGE>

                                    EXHIBIT B

                           Form of the Award Agreement

                                   (attached)
<PAGE>
                                                                     EXHIBIT A-1

                     RESTATED CERTIFICATE OF INCORPORATION
                                      OF
                                  VIACOM INC.

                                  ARTICLE XIII

                          GOVERNANCE OF THE CORPORATION
                             DURING SPECIFIED PERIOD

(1) Definitions. As used in this Article XIII, the following terms shall have
the following meanings:

(a) "CBS" shall mean CBS Corporation, a Pennsylvania corporation, immediately
prior to the Effective Time.

(b) "CBS Directors" shall mean (i) eight (8) of those directors serving as
members of the Board of Directors of CBS on September 6, 1999 (or any
Independent Directors elected or appointed prior to the Effective Time to serve
as a CBS Director) who are designated as such by the Board of Directors of CBS
prior to the Effective Time and (ii) any Replacement CBS Director (as defined in
Section 2(b) of this Article XIII).

                                       14
<PAGE>

(e) "CEO" shall mean the Chief Executive Officer.

(d) "COO" shall mean the President and Chief Operating Officer.

(e) "Effective Time" shall mean the time of filing of the Certificate of Merger
to which this Certificate of Incorporation is attached.

(f) "Independent Director" shall mean a disinterested, independent person
(determined in accordance with customary standards for independent directors
applicable to U.S. public companies).

(g) "NAI" shall mean National Amusements, Inc., a Maryland corporation, and its
successors or assigns.

(h) "Specified Independent Directors" shall mean the directors of
the Corporation first elected after 1993 and who are not management of the
Corporation or NAI (together with any replacements of such persons).

(i)"Specified Period" shall mean the period of three years commencing at the
Effective Time.

(j) "Stockholder Agreement" shall mean the Stockholder
Agreement dated as of September 6, 1999, by and between NAI and CBS, relating to
Corporation governance matters.

(k) "Viacom Directors" shall mean the ten (10) directors of the Corporation
serving as the Board of Directors of the Corporation immediately prior to the
Effective Time (including the Specified Independent Directors).

(2) Directors.

    (a) Effective immediately at the Effective Time, the Board of Directors
shall consist of eighteen (18) directors. The number of directors may be fixed
by resolution of the Board from time to time, provided, however, that the size
of the Board of Directors may not be changed during the Specified Period without
the approval of at least fourteen (14) directors. At the Effective Time, ten
(10) directors shall be Viacom Directors and eight (8) directors shall be CBS
Directors.

    (b) Until the expiration of the Specified Period, the Board of Directors
(subject to the fiduciary duties of the directors) shall take all action
necessary to ensure that any seat on the Board of Directors held by (i) a CBS
Director which becomes vacant is filled promptly by a person qualifying

                                       15
<PAGE>

as an Independent Director and designated to fill such seat by a majority of the
CBS Directors remaining on the Board of Directors (a "Replacement CBS Director")
and (ii) a Specified Independent Director which becomes vacant is filled
promptly by an Independent Director who is the chief executive officer, chief
operating officer or chief financial officer or former chief executive officer
of a Fortune 500 company or a non-U.S. public company of comparable size.

(c) During the Specified Period, all committees of the Board of Directors (other
than the Compensation Committee and the Officers Nominating Committee) shall
have such number of CBS Directors as equals the total number of members of the
Committee multiplied by a fraction, the numerator of which is eight (8) and the
denominator of which is eighteen (18), rounded to the closest whole number;
provided that in no event shall any committee have (x) fewer than one (1) CBS
Director or (y) less than a majority of Viacom Directors.

(d) During the Specified Period, the Board of Directors shall not take any
action or fail to take any action which would have the effect of eliminating,
limiting, restricting, avoiding or otherwise modifying the effect of the
provisions set forth in this Article XIII (e.g., by creating a holding company
structure if the certificate of incorporation or similar document of such
holding company does not contain equivalent provisions).

(3) Chairman and Chief Executive Officer.

(a) At the Effective Time, Sumner Redstone shall remain the Chairman and CEO. In
the event that Sumner Redstone is not the CEO at the Effective Time or ceases to
be the CEO at any time during the Specified Period, then Mel Karmazin, if he is
COO at such time, shall succeed to the position of CEO for the remainder of the
Specified Period. During any such period of succession, Mel Karmazin shall
continue to exercise the powers, rights, functions and responsibilities of the
COO in addition to exercising those of the CEO.

(b) The Chairman shall chair all meetings of the Board of Directors and
stockholders at which he is present.

(c) The CEO shall be responsible, in consultation with the COO, for corporate
policy and strategy and the COO shall consult on all major decisions with, and
shall report directly to, the CEO, during the Specified Period; provided,
however, that the CEO shall not exercise any powers, rights, functions or
responsibilities of the COO unless Mel Karmazin is the CEO.

                                       16
<PAGE>

(4)      President and Chief Operating Officer.

(a) At the Effective Time, the President and Chief Operating Officer of the
Corporation shall be Mel Karmazin. During the Specified Period, Mel Karmazin may
not be terminated or demoted from the position of COO (or, in the event that
Sumner Redstone is not the CEO, from the position of CEO) and no COO Functions
(as defined below) may be changed without the affirmative vote of at least
fourteen (14) directors.

(b) Subject to the requirement that the COO consult with the CEO on all major
decisions, the powers, rights, functions and responsibilities of the COO
(collectively, the "COO Functions") shall include, without limitation, the
following:

     (i) supervising, coordinating and managing the Corporation's business,
   operations, activities, operating expenses and capital allocation;

     (ii) matters relating to officers (other than the Chairman, CEO and COO)
   and employees, including, without limitation, hiring (subject to (A) the
   specific Board of Directors authority described below with respect to the
   CFO, the General Counsel and the Controller and (B) Section 5 below),
   terminating, changing positions and allocating responsibilities of such
   officers and employees; and

     (iii) substantially all of the powers, rights, functions and
   responsibilities typically exercised by a chief operating officer.

      All officers (other than the Chairman, CEO and COO) will report, directly
or indirectly, to the COO (this reporting relationship will be deemed a COO
Function).

(c) In the event that Mel Karmazin is not COO or CEO, the Board may terminate
the COO's employment, eliminate the COO position and the Officers Nominating
Committee and reallocate the COO Functions without regard to the other
provisions of this Article XVIII.

(5) Officers Nominating Committee; Compensation Committee.

   (a) Subject to the powers of the Compensation Committee set forth below,
during the Specified Period, all powers of the Board of Directors, including,
without limitation, the right to hire, elect, terminate, change positions,
allocate responsibilities or determine non-equity compensation, with respect to
officers and employees, shall be exercised, subject

                                       17
<PAGE>

to clauses (b) and (c) below, by, and delegated to, the Officers Nominating
Committee of the Board of Directors. The Officers Nominating Committee shall
consist solely of the member of the Board of Directors who is the COO, except
that in the event Mel Karmazin succeeds to the position of CEO, the sole member
of the Officers Nominating Committee shall be the member of the Board of
Directors who is the CEO.

(b) The Officers Nominating Committee shall have no powers with respect to the
Chairman, CEO and COO, and shall not have the power to fill the positions of
Chief Financial Officer, Controller or General Counsel of the Corporation
without the approval of the Board of Directors; provided that this provision
shall in no way affect the other powers and authorities of the Officers
Nominating Committee with respect to the Chief Financial Officer, Controller and
General Counsel positions, including, without limitation, the power to terminate
employment of persons holding such positions.

(c) The Compensation Committee shall not be required to, or have any power to,
approve the annual compensation of (i) any employee if the total value of such
employee's annual cash compensation (assuming for this purpose that the actual
bonus of each officer and employee is equal to his or her target bonus) is less
than $1 million or (ii) talent (as such term is commonly used in the media or
entertainment industries), in each such case which power shall be delegated to
the Officers Nominating Committee. The annual compensation of all other officers
and employees and any equity or equity-based compensation of any officer or
employee must be approved by the Compensation Committee.

(d) The Compensation Committee shall consist of three CBS Directors who are
Independent Directors and three non-CBS Directors, two of whom will be the
Specified Independent Directors and the other of whom will be an Independent
Director.

(e) Any decision or determination of the Officers Nominating
Committee may be reversed or overridden by (and only by) the affirmative vote of
at least fourteen (14) directors.

(6)      Stockholder Agreement.

      The Stockholder Agreement may not be amended, and no provision thereof may
be modified or waived, except with the approval of at least fourteen (14)
directors.

                                       18
<PAGE>

(7)      Issuance of Voting Stock.

      During the Specified Period, in addition to any other approval required by
law or by this Restated Certificate of Incorporation, the Corporation may not
issue (i) additional shares of Class A Common Stock or (ii) any shares of
Preferred Stock or any other class or series of stock or securities, in each
case with, or convertible into or exchangeable or exercisable for stock or other
securities with, the right to vote on any matter on which stockholders are
entitled to vote if the result would be that parties bound by the Stockholder
Agreement could fail to own at least a majority of the outstanding shares of
voting stock of the Corporation.

(8)      Voting

      During the Specified Period, except for those actions set forth on Annex I
to this Restated Certificate of Incorporation, which shall require the approval
of the Board of Directors, all action by the Board of Directors shall require
the affirmative vote of at least fourteen (14) directors. At all meetings of the
Board of Directors a majority of the full Board of Directors shall constitute a
quorum for the transaction of business and the act of a majority of the
Directors present at any meeting at which there is a quorum shall be the act of
the Board of Directors, except as may be otherwise specifically provided by
statute or this Restated Certificate of Incorporation. If a quorum shall not be
present at any meeting of the Board of Directors, the Directors present thereat
may adjourn the meeting from time to time, without notice other than
announcement at the meeting, until a quorum shall be present.

(9)      Amendment.

      Until the expiration of the Specified Period the provisions of any Article
of this Restated Certificate which refer to this Article XIII, the provisions of
this Article XIII, and the provisions of Article VIII of the by-laws of the
Corporation, may not be amended, altered, repealed or waived in any respect
without the approval of at least fourteen (14) directors.

(10)      Successors.

      During the Specified Period, the provisions of this Article XIII shall be
applicable to (i) any successor to the Corporation as the result of a merger,
consolidation or other business combination, whether or not the Corporation is
the surviving company in such transaction, or otherwise and (ii) any corporation
or other entity with respect to which the

                                       19
<PAGE>

Corporation or its successor is or becomes a direct or indirect subsidiary, the
Board of Directors shall not permit the Corporation to be a party to any
transaction which would not comply with the foregoing without the approval of at
least fourteen (14) directors.

(11)      Subsidiaries.

      The Board of Directors shall have the right, following consultation with
the COO or, if Mel Karmazin is the CEO, the CEO, with respect to any public
company which is a subsidiary of the Corporation, to take such steps as the
Board of Directors reasonably determines are necessary to implement corporate
governance arrangements applicable to such subsidiary in a manner as consistent
as practicable with the provisions contained in this Restated Certificate of
Incorporation; provided that any such steps shall not vest in the Board of
Directors greater power or provide the COO with fewer rights than those provided
for in this Restated Certificate of Incorporation.




                                       20
<PAGE>

                                    EXHIBIT B



                           Form of Agreement Under the
                                   Viacom Inc.
                    1997 Long-Term Management Incentive Plan
                         for the 1999 Stock Option Grant
          ------------------------------------------------------------

          AGREEMENT, dated as of ____________, by and between Viacom Inc., a
Delaware corporation (the "Company"), and ______________________ (the
"Participant"), with respect to the 1999 grant of stock options under the
Company's 1997 Long-Term Management Incentive Plan, as amended (the "Plan").

          This Agreement, together with the Memorandum dated _____________ and
the agreements delivered under the Plan in connection with each grant of stock
options under the Plan, constitutes the prospectus covering the shares of Class
B Common Stock subject to the Plan. The Participant can receive additional
copies of his or her Plan agreements and the Memorandum upon request to the
Administrator, Long-Term Incentive Plans, Viacom Inc., 1515 Broadway, New York,
New York 10036.


                                   WITNESSETH:

          WHEREAS, the Participant is now employed by the Company or one of its
subsidiaries in a key capacity and the Company desires to reward the
Participant, in accordance with the terms hereof, for the Participant's
contributions to the financial success of the Company by awarding the
Participant stock options to purchase shares of Class B Common Stock;

          NOW, THEREFORE, in consideration of the covenants and agreements
herein contained, the parties hereto hereby agree as follows:


                                    ARTICLE I

                             TERMS OF STOCK OPTIONS

                   Section 1.1 Grant of Stock Options. Subject to the terms and
conditions contained herein and in the Plan, the terms of which are hereby
incorporated by reference, the Company hereby awards to the Participant,
effective as of ___________________ (the "Date of Grant"), a grant of stock
options (the "Stock Options") to purchase ______________ shares of Class B
Common Stock at an exercise price of $___________ for each share (the "Exercise
Price"). The capitalized terms used in this Agreement which are not otherwise
defined herein shall have the meanings assigned to
<PAGE>

them in Article III hereof. The Stock Options granted hereunder are not intended
to be, or qualify as, "Incentive Stock Options" within the meaning of Section
422 of the Code.

                   Section 1.2       Terms of Stock Options.

                   (a) Vesting. The Stock Options shall be exercisable only to
          the extent the Participant is vested therein. The Stock Options shall
          vest in one-third increments on ____________________ and
          ________________________.

                   (b) Option Period. Except as provided in Section 1.2(c)
          hereof, the period during which the Stock Options may be exercised
          shall expire on the tenth anniversary of the Date of Grant (the
          "Expiration Date").

                   (c) Exercise in the Event of Termination of Employment,
          Retirement, Death or Permanent Disability.

                            (i) Termination other than for Cause, Retirement,
                   Death or Permanent Disability. In the event that (A) the
                   Participant ceases to be an employee of the Company or any of
                   its subsidiaries by reason of the voluntary termination by
                   the Participant or the termination by the Company or any of
                   its subsidiaries other than for Cause, the Participant may
                   exercise his or her Outstanding Stock Options to the extent
                   then exercisable until the earlier of six months after the
                   date of such termination (or such longer period, not in
                   excess of the second anniversary of the Date of Grant of such
                   Stock Options, as may be determined by the Committee, in its
                   discretion) or the Expiration Date, (B) the Participant
                   ceases to be an employee of the Company or any of its
                   subsidiaries by reason of the Participant's Retirement, the
                   Participant may exercise his or her Outstanding Stock Options
                   to the extent then exercisable until the earlier of two years
                   after such date or the Expiration Date, (C) the Participant
                   dies during a period during which his or her Stock Options
                   could have been exercised by him or her, his or her
                   Outstanding Stock Options may be exercised to the extent
                   exercisable at the date of death by the person who acquired
                   the right to exercise such Stock Options by will or the laws
                   of descent and distribution until the earlier of one year
                   after such death (or such longer period as may be determined
                   by the Committee, in its discretion, prior to the expiration
                   of such one-year period) or the Expiration Date, or (D) the
                   Permanent Disability of the Participant occurs, the
                   Participant may exercise his or her Outstanding Stock Options
                   to the extent exercisable upon the onset of such Permanent
                   Disability until the earlier of one year after such date (or
                   such longer period not in excess of two years after such date
                   as may be determined by the Committee in its discretion) or
                   the Expiration Date. Upon the occurrence of an event
                   described in clauses (A), (B), (C) or (D) of this Section
                   1.2(c)(i), all rights with respect to Stock Options that are
                   not vested as of such event will be relinquished.



                                        2
<PAGE>

                            (ii) Termination for Cause. If the Participant's
                   employment with the Company or any of its subsidiaries ends
                   because of a Termination for Cause, all Outstanding Stock
                   Options, whether or not then vested, shall terminate
                   effective as of the date of such termination.

                   Section 1.3  Exercise of Stock Options.

                            (a) Whole or Partial Exercise. Subject to the
                   restrictions of Section 1.2(b) hereof, the Participant may
                   exercise all vested Stock Options granted hereunder at one
                   time or in installments of 100 Stock Options (or in the whole
                   number of unexercised Stock Options in which the Participant
                   is vested, if such number is less than 100) by written notice
                   to the Administrator, Long-Term Incentive Plans, Viacom Inc.,
                   1515 Broadway, New York, New York 10036. Such notice shall
                   (i) state the number of full Stock Options being exercised
                   (ii) be signed by the person or persons so exercising the
                   Stock Options and, in the event the Stock Options are being
                   exercised (pursuant to Section 1.2(c)(i) hereof) by any
                   person or persons other than the Participant accompanied by
                   proof satisfactory to the Company's counsel of the right of
                   such person or persons to exercise the Stock Options, and
                   (iii) be accompanied by full payment as set forth in Section
                   1.3(b) hereof.

                            (b) Payment of Aggregate Option Price. The written
                   notice of exercise described above must be accompanied by
                   full payment of the aggregate Exercise Price which shall be
                   determined by multiplying the number of Stock Options being
                   exercised by the Exercise Price. Such Exercise Price shall be
                   paid in cash (e.g. personal bank check, certified check or
                   official bank check). In addition, in accordance with Section
                   4.3 hereof, the Participant shall make an arrangement
                   acceptable to the Company to pay to the Company an amount
                   sufficient to satisfy the combined Federal, state and local
                   withholding tax obligations which arise in connection with
                   the exercise of such Stock Options.

                            (c) Issuance of Share Certificates. Upon
                   satisfaction of the conditions set forth in Section 1.3(b)
                   hereof, the Company shall deliver (or cause to be delivered)
                   a certificate or certificates for the shares of Class B
                   Common Stock issued pursuant to the exercise of the Stock
                   Options to the Participant.

                                   ARTICLE II

                       EFFECT OF CERTAIN CORPORATE CHANGES


                   In the event of a merger, consolidation, stock split,
dividend, distribution, combination, reclassification or recapitalization that
changes the character or amount of the Class B Common Stock, the Committee shall
make such adjustments to the number of shares of Class B


                                        3
<PAGE>

Common Stock subject to the Stock Options or the exercise price of the Stock
Options, in each case, as it deems appropriate. Such determinations shall be
conclusive and binding for all purposes.


                                   ARTICLE III

                                   DEFINITIONS

                   As used in this Agreement, the following terms shall have the
following meanings:

                            (a) "Board" shall mean the Board of Directors of the
          Company.

                            (b) "Class B Common Stock" shall mean shares of
          Class B Common Stock, par value $0.01 per share, of the Company.

                            (c) "Code" shall mean the Internal Revenue Code of
          1986, as amended, including any successor law thereto.

                            (d) "Committee" shall mean the Senior Executive
          Compensation Committee of the Board (or such other Committee as may be
          appointed by the Board) except that (i) the number of directors on the
          Committee shall not be less than two and (ii) each member of the
          Committee shall be a "non-employee director" within the meaning of
          Rule 16b-3 under the Exchange Act.

                            (e) "Exchange Act" shall mean the Securities
          Exchange Act of 1934, as amended, including any successor law thereto.

                            (f) "Fair Market Value" of a share of Class B Common
          Stock on a given date shall be the closing price of a share of Class B
          Common Stock on the New York Stock Exchange or such other national
          securities exchange as may be designated by the Committee or, in the
          event that the Class B Common Stock is not listed for trading on a
          national securities exchange but is quoted on an automated quotation
          system, the average closing bid price per share of the Class B Common
          Stock on such automated quotation system or, in the event that the
          Class B Common Stock is not quoted on any such system, the average of
          the closing bid prices per share of the Class B Common Stock as
          furnished by a professional marketmaker making a market in the Class B
          Common Stock designated by the Committee.

                            (g) "Outstanding Stock Option" shall mean a Stock
          Option granted to the Participant which has not yet been exercised and
          which has not yet expired in accordance with its terms.



                                        4
<PAGE>

                            (h) "Permanent Disability" shall have the same
          meaning as such term or a similar term has in the long-term disability
          policy maintained by the Company or a subsidiary thereof for the
          Participant and in effect on the date of the onset of the
          Participant's Permanent Disability.

                            (i) "Retirement" shall mean the resignation or
          termination of employment after attainment of an age and years of
          service required for payment of an immediate pension pursuant to the
          terms of any qualified retirement plan maintained by the Company or a
          subsidiary in which the Participant participates; provided, however,
          that no resignation or termination prior to a Participant's 60th
          birthday shall be deemed a retirement unless the Committee so
          determines in its sole discretion.

                            (j) "Termination for Cause" shall mean a termination
          of employment with the Company or any of its subsidiaries which, as
          determined by the Committee, is by reason of (i) "cause" as such term
          or a similar term is defined in any employment agreement applicable to
          the Participant, or (ii) if there is no such employment agreement or
          if such employment agreement contains no such term, (x) dishonesty,
          conviction of a felony, or willful unauthorized disclosure of
          confidential information, (y) failure, neglect of or refusal by the
          Participant to substantially perform the duties of the Participant's
          employment, or (z) any other act or omission which is materially
          injurious to the financial condition or business reputation of the
          Company of any subsidiary thereof.

                            (k) To "vest" a Stock Option held by the Participant
          shall mean to render such Stock Option exercisable, subject to the
          terms of the Plan, except where the Participant's employment ends
          because of a Termination for Cause.


                                   ARTICLE IV

                                  MISCELLANEOUS


                   Section 4.1 No Rights to Continued Employment. Neither this
Agreement, the Plan nor any action taken in accordance with such documents shall
be construed as giving the Participant any right to be retained by the Company
or any of its subsidiaries.

                   Section 4.2 Restriction on Transfer. The rights of the
Participant with respect to the Stock Options shall not be transferable by the
Participant except (i) by will or the laws of descent and distribution or (ii)
subject to the prior approval of the Committee, for transfers to members of the
Participant's immediate family or trusts whose beneficiaries are members of the
Participant's immediate family, in each case subject to the condition that the
Committee shall be satisfied that such transfer is being made for estate an/or
tax planning purposes without consideration being received therefor and subject
to such other conditions as the Committee may impose.


                                        5
<PAGE>

                   Section 4.3 Tax Withholding. As a condition to the exercise
of the Stock Options, the Participant shall make a payment (or an arrangement
acceptable to the Company for the withholding of such payment) sufficient to
satisfy the combined Federal, state and local withholding tax obligations which
arise in connection with the exercise of such Stock Options.

                   Section 4.4 Stockholder Rights. The grant of Stock Options
under this Agreement shall not entitle the Participant or any permitted
transferee to any rights of a holder of shares of common stock of the Company,
other than when and until share certificates are delivered to the Participant
upon exercise of a Stock Option.

                   Section 4.5 No Restriction on Right of Company to Effect
Corporate Changes. This Agreement shall not affect in any way the right or power
of the Company or its stockholders to make or authorize any or all adjustments,
recapitalization, reorganization or other changes in the Company's capital
structure or its business, or any merger or consolidation of the Company, or any
issue of stock or of options, warrants or rights to purchase stock or of bonds,
debentures, preferred or prior preference stocks whose rights are superior to or
affect the Class B Common Stock or the rights thereof or which are convertible
into or exchangeable for Class B Common Stock, or the dissolution or liquidation
of the Company, or any sale or transfer of all or any part of its assets or
business, or any other corporate act or proceeding, whether of a similar
character or otherwise.

                   Section 4.6 Amendment. Other than as provided in Article II
hereof, this Agreement may not be modified, amended or waived in any manner
except by an instrument in writing signed by both parties hereto. The waiver by
either party of compliance with any provision of this Agreement by the other
party shall not operate or be construed as a waiver of any other provision of
this Agreement, or of any subsequent breach by such party of a provision of this
Agreement.

                   Section 4.7 Stockholder Approval. The grant of Stock Options
under this Agreement is subject to the approval of the stockholders of the
Company, at the next annual or special meeting of stockholders, to the extent
that the number of shares of Class B Common Stock subject to the Plan is
insufficient to cover the number of shares of Class B Common Stock subject to
Stock Options awarded under this Agreement.

                   Section 4.8 Notices. Every notice or other communication
relating to this Agreement shall be in writing, and shall be mailed to or
delivered to the party for whom it is intended at such address as may from time
to time be designated by such party in a notice mailed or delivered to the other
party as herein provided. If no such address has been specified by the
Participant, such notices or communications shall be sent to the Participant's
address as specified in the records of the Company.

                   Section 4.9 Headings. The headings of sections and
subsections herein are included solely for convenience of reference and shall
not affect the meaning of any of the provisions of this Agreement.


                                        6
<PAGE>

                   Section 4.10 Receipt of Copy of Plan.  By executing this
Agreement, the Participant acknowledges receipt of a copy of the Plan.

                   Section 4.11 Governing Law.  This Agreement and all rights
hereunder shall be construed in accordance with and governed by the laws of the
State of Delaware.

                                   VIACOM INC.



                                   By:
                                        ----------------------------------------
                                        Senior Vice President,
                                        Human Resources and
                                        Administration


                                        ----------------------------------------
                                        Participant



                                        7
<PAGE>

                                                                        Annex H

                                                              September 6, 1999
Board of Directors
Viacom Inc.
1515 Broadway
New York, NY 10036

Members of the Board:

We understand that CBS Corporation ("CBS" or the "Company") and Viacom Inc.
("Viacom") have entered into an Agreement and Plan of Merger, dated as of
September 6, 1999 (the "Merger Agreement"), which provides, among other things,
for the merger of CBS with and into Viacom (the "Merger"). Pursuant to the
Merger, each issued and outstanding share of common stock, par value $1.00 per
share, of CBS ("CBS Common Stock") shall be converted into the right to receive
1.085 shares (the "Exchange Ratio") of Class B Common Stock, par value $0.01 per
share (the "Viacom Class B Common Stock") of Viacom. The terms and conditions of
the Merger are more fully set forth in the Merger Agreement.

You have asked for our opinion as to whether the Exchange Ratio pursuant to the
Merger Agreement is fair from a financial point of view to Viacom.

For purposes of the opinion set forth herein, we have:

         (i)      reviewed certain publicly available financial statements and
                  other information of the CBS and Viacom, respectively;

         (ii)     reviewed certain internal financial statements and other
                  financial and operating data concerning the CBS and Viacom
                  prepared by the respective managements of the CBS and Viacom;

         (iii)    discussed the past and current operations and financial
                  condition and the prospects of CBS and Viacom with senior
                  executives of CBS and Viacom;

         (iv)     analyzed certain internal financial statements and other
                  financial operating data concerning CBS and Viacom prepared by
                  the respective managements of CBS and Viacom;
<PAGE>

         (v)      discussed the past and current operations and financial
                  condition and the prospects of the Viacom with senior
                  executives of Viacom including their estimates of the
                  strategic and operational benefits of the Merger, and analyzed
                  the pro forma impact of the Merger on Viacom's financial
                  ratios;

         (vi)     reviewed the reported prices and trading activity for the CBS
                  Common Stock and the Viacom Class B Common Stock;

         (vii)    compared the financial performance of CBS and Viacom and the
                  prices and trading activity of CBS and Viacom with that of
                  certain other comparable publicly-traded companies and their
                  securities;

         (viii)   participated in discussions and negotiations among
                  representatives of CBS and Viacom and their financial and
                  legal advisors;

         (ix)     reviewed the Merger Agreement, the Voting Agreement dated as
                  of September 6, 1999 between CBS and certain shareholders of
                  Viacom and certain related documents; and

         (x)      performed such other analyses and considered such other
                  factors as we have deemed appropriate.

We have assumed and relied upon without independent verification the accuracy
and completeness of the information reviewed by us for the purposes of this
opinion. With respect to the financial projections, including information
relating to certain strategic and operational benefits of the Merger, we have
assumed that they have been reasonably prepared on bases reflecting the best
currently available estimates and judgments of the future financial performance
of CBS and Viacom, respectively. We have not made any independent valuation or
appraisal of the assets or liabilities of CBS and Viacom, nor have we been
furnished with any such appraisals. We have assumed that the Merger will be
consummated in accordance with the terms set forth in the Merger Agreement. Our
opinion is necessarily based on economic, market and other conditions as in
effect on, and the information made available to us as of, the date hereof.

We have acted as financial advisor to the Board of Directors of Viacom in
connection with this transaction and will receive a fee for our services. In the
past, Morgan Stanley & Co. Incorporated and its affiliates have provided
financial advisory and financing services for CBS and Viacom and have received
fees for the rendering of these services. In the ordinary course of business,
Morgan Stanley may from time to time trade in the securities of CBS and Viacom
for its own account, the accounts of investment funds under the management of
Morgan Stanley and for the accounts of its customers and, accordingly, may at
any time hold a long or short position in such securities.
<PAGE>

It is understood that this letter is for the information of the Board of
Directors of Viacom and may not be used for any other purpose without our prior
written consent, except that this opinion may be included in its entirety in any
filing made by CBS or Viacom in respect of the Merger with the Securities and
Exchange Commission. In addition, this opinion does not in any manner address
the prices at which Viacom Class B Common Stock will trade following the
consummation of the Merger, and Morgan Stanley expresses no opinion or
recommendation as to how the stockholders of CBS and Viacom should vote at the
respective stockholders' meetings held in connection with the Merger.

Based on and subject to the foregoing, we are of the opinion on the date hereof
that the Exchange Ratio pursuant to the Merger Agreement is fair from a
financial point of view to Viacom.


                                Very truly yours,

                                MORGAN STANLEY & CO. INCORPORATED

                                         /s/ Paul J. Taubman
                                By:      ..................................
                                         Paul J. Taubman
                                         Managing Director
<PAGE>
                                                                        Annex I


                                      September 6, 1999

Board of Directors
CBS Corporation
51 West 52nd Street
New York, NY  10019


Members of the Board of Directors:

     We understand that CBS Corporation ("CBS") has entered into an Agreement
and Plan of Merger dated as of September 6, 1999, by and between Viacom Inc.
("Viacom") and CBS (the "Merger Agreement").  Pursuant to the Merger Agreement,
CBS will merge with and into Viacom (the "Merger") and each outstanding share of
CBS Common Stock, par value $1.00 per share (the "CBS Common Stock"), will be
converted into the right to receive 1.085 shares of Viacom Class B Common Stock,
par value $0.01 per share ("Viacom Class B Common Stock"), with the number of
shares of Viacom Class B Common Stock to be received for each share of CBS
Common Stock being referred to herein as the exchange ratio (the "Exchange
Ratio").

     You have asked us for our opinion as to whether the Exchange Ratio is fair,
from a financial point of view, to the holders of CBS Common Stock.

     In connection with rendering our opinion, we have, among other things:

    (i)     analyzed certain publicly available financial statements and other
            information relating to CBS and Viacom;

    (ii)    analyzed certain internal financial statements and other non-public
            financial and operating data concerning CBS, which were prepared by
            and furnished to us or reviewed for us by the management of CBS, and
            concerning Viacom, which were prepared by and furnished to us or
            reviewed for us by the management of Viacom;

    (iii)   analyzed certain financial projections concerning CBS, which were
            prepared by the management of CBS, and concerning Viacom, which were
            prepared by the management of Viacom;

    (iv)    discussed the past and current operations and financial condition
            and the prospects of CBS with the management of CBS;

    (v)     discussed the past and current operations and financial condition
            and the prospects of Viacom with the management of Viacom;
<PAGE>

September 6, 1999
Page 2


    (vi)    reviewed the reported prices and trading activity of the CBS Common
            Stock and Viacom Class B Common Stock;

    (vii)   compared the market valuation and financial performance of CBS and
            Viacom to that of certain other comparable publicly-traded
            companies;

    (viii)  reviewed the financial terms to the extent available of certain
            comparable acquisition transactions;

    (ix)    participated in discussions and negotiations among representatives
            of CBS, Viacom, and their financial and legal advisers;

    (x)     reviewed the Merger Agreement and the related exhibits and schedules
            in the form provided to us and have assumed that the final form of
            such Merger Agreement, exhibits and schedules will not vary in any
            respect material to our analysis;


    (xi)    reviewed certain information concerning cost savings and combination
            benefits ("Synergies") expected to result from the Merger that was
            provided to us or reviewed for us by the managements of CBS and
            Viacom; and

    (xii)   performed such other analyses and examinations and considered such
            other factors as we have in our sole judgment deemed appropriate.

     For purposes of our analysis and opinion, we have assumed and relied,
without independent verification, upon the accuracy and completeness of the
information reviewed by us or reviewed for us for purposes of this opinion.
With respect to the financial projections of CBS and Viacom and the underlying
analysis concerning the potential Synergies which were furnished to us or
reviewed for us by the managements of CBS and Viacom, we have assumed that they
have been reasonably prepared on bases reflecting the best currently available
estimates and good faith judgments of the future competitive, operating and
regulatory environments and related financial performance of CBS and Viacom.  We
have not made nor assumed any responsibility for making any independent
valuation or appraisal of the assets or liabilities of CBS or Viacom, nor have
we been furnished with any such appraisals.  Our opinion is necessarily based on
economic, market and other conditions as in effect on, and the information and
Agreements made available to us as of, the date hereof.  We have, with your
approval, assumed the Merger will qualify as a tax-free reorganization within
the meaning of Section 368 of the Internal Revenue Code of 1986, as amended.
Our opinion does not address CBS's underlying business decision to effect the
Merger nor constitute a recommendation to any CBS shareholder as to how such
holder should vote with respect to the Merger.  Furthermore, we express no
opinion as to the price or range of prices at which the shares of Viacom Class B
Common Stock will trade subsequent to the consummation of the Merger.
<PAGE>

September 6, 1999
Page 3

     For purposes of rendering our opinion, we have assumed, in all respects
material to our analysis, that the representations and warranties of each party
contained in the Merger Agreement are true and correct, that each party will
perform all the covenants and agreements required under the Merger Agreement,
and that all conditions to the consummation of the Merger will be satisfied
without waiver thereof.

     We have acted as financial advisor to the Board of Directors of CBS in
connection with the Merger and will receive a fee for our services upon the
rendering of this opinion.  In the past, Evercore Partners Inc. has provided
financial advisory services for CBS and has received fees for the rendering of
these services.

     It is understood that this letter and the opinion expressed herein is for
the information of the Board of Directors of CBS only and may not be quoted or
referred to or relied upon or used for any other purpose without our prior
written consent except as we and our affiliates have otherwise agreed with CBS
in writing.

     Based upon and subject to the foregoing, it is our opinion that, as of the
date hereof, the Exchange Ratio is fair, from a financial point of view, to the
holders of CBS Common Stock.

                                    Very truly yours,


                                    EVERCORE GROUP INC.


                                    By: /s/ David G. Offensend
                                       ----------------------------------
                                       David G. Offensend
                                       Vice Chairman
<PAGE>

                                                                         ANNEX J

                       COMPARISON OF RIGHTS OF HOLDERS OF
                    VIACOM COMMON STOCK AND CBS COMMON STOCK

     The rights of Viacom shareholders are governed by Delaware law, including
the DGCL, and Viacom's current Restated Certificate of Incorporation and By-
laws.  The rights of CBS shareholders are governed by Pennsylvania law,
including the Pennsylvania Business Corporation Law, and CBS' Restated Articles
of Incorporation and By-laws.  Upon consummation of the merger, holders of
shares of CBS common stock will become holders of shares of Viacom non-voting
Class B common stock. Consequently, following the merger, Delaware law and
Viacom's proposed new Restated Certificate of Incorporation and its By-laws,
both as amended as a result of the merger, will govern the rights of former CBS
shareholders.  Copies of Viacom's current Restated Certificate of Incorporation
and By-laws and CBS' Restated Articles of Incorporation and By-laws have been
filed with the SEC and will be sent to any shareholder of Viacom or CBS upon
request.  Copies of Viacom's proposed new Restated Certificate of Incorporation
and By-laws, as they will be amended as a result of the merger, are attached as
Annexes B and C to this joint proxy statement/prospectus.

     The following table compares the rights of Viacom and CBS shareholders both
before and after the effective time of the merger.  This table is not intended
to be a complete statement of all differences or a complete description of the
specific provisions referred to in this summary, and the identification of
specific differences is not intended to indicate that other significant
differences do not exist.  Other than voting rights, there is no difference
between the rights of holders of Viacom Class A common stock and Viacom Class B
common stock.

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
Voting, generally            Class A Common Stock:            Common Stock:                           See "Viacom Before the
                                                                                                      Merger". Shares of Viacom
                             . 1 vote per share.               . 1 vote per share.                    Class B Common Stock,
                                                                                                      including the shares which
                             -- No cumulative voting.          -- No cumulative voting.               CBS shareholders will receive
                                                                                                      in the merger, have no voting
                             -- Plurality vote for             -- Plurality vote for directors.       rights or powers except as
                                directors.                                                            required by Delaware law.

                             -- Majority vote for all          -- Majority vote for all other matters
                                other matters.                    except as set forth below where a
                                                                  higher vote is required for certain
                                                                  approvals and except as otherwise
                             Class B Common Stock:                required by Pennsylvania law.

                             . Except as required by
                               Delaware law, this class has
                               no voting rights or powers.
- ------------------------------------------------------------------------------------------------------------------------------------
Approval of Certain          Under Delaware law, subject to    Under Pennsylvania law, subject to         See "Viacom Before the
 Business Combinations       certain limited exceptions,       certain limited exceptions, the            Merger".
                             the approval of the holders of    affirmative vote of a majority of the
                             a majority of the outstanding     votes cast by all shareholders
                             stock entitled to vote is         entitled to vote thereon is required
                             required for any merger or        for any merger or consolidation of a
                             consolidation of a Delaware       Pennsylvania corporation with another
                             corporation with another          corporation or the sale, lease,
                             corporation or the sale, lease    exchange or other
                             or exchange of all or
                             substantially all of that
                             corporation's
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      J-1
<PAGE>
<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>

                             assets.                          disposition of all or substantially
                                                              all of that corporation's property
                                                              and assets outside of the ordinary
                                                              course of business.
- ------------------------------------------------------------------------------------------------------------------------------------
Approval of Certain          Delaware law contains            Pennsylvania law contains provisions       See "Viacom Before the
 Business Combinations       provisions that may restrict     that may restrict certain business         Merger".
 with Affiliates             certain business combinations    combinations between a corporation
                             between a corporation and its    and its affiliates.  See the
                             affiliates which are not         provisions described under
                             wholly owned.  Viacom's          "Anti-Takeover Provisions".
                             Restated Certificate of
                             Incorporation and By-laws do     Except as described in the next
                             not impose any higher voting     paragraph, CBS' Restated Articles of
                             requirements for the approval    Incorporation and By-laws do not
                             of these actions.                impose any higher voting requirements
                                                              for the approval of business
                                                              combinations.

                                                              CBS' Restated Articles of
                                                              Incorporation require that certain
                                                              combinations with a 5% (at least)
                                                              shareholder receive the approval of
                                                              holders of a supermajority (80%) of
                                                              all shares entitled to vote and a
                                                              majority of shares held by all
                                                              shareholders other than such 5%
                                                              shareholder and its affiliates unless
                                                              the transaction is approved by a
                                                              majority of disinterested directors
                                                              or satisfies certain specified
                                                              fairness criteria with respect to the
                                                              consideration to be received and
                                                              certain other matters.

                                                              Amendment of these provisions
                                                              requires the approval of at least 80%
                                                              of the combined vote of all shares
                                                              entitled to vote generally in an
                                                              annual election of directors and a
                                                              majority of the combined vote of such
                                                              shares held by all shareholders other
                                                              than 5% shareholders and their
                                                              affiliates, voting as a class.
- ------------------------------------------------------------------------------------------------------------------------------------
Number of Directors and      Under Delaware law, the          Under Pennsylvania law, the articles    Under Viacom's proposed new
 Size of Board               certificate of incorporation     of incorporation or the by-laws may     Restated Certificate of
                             or the by-laws may specify the   specify the number of directors.        Incorporation, the number of
                             number of directors.                                                     directors will be expanded to
                                                              CBS' By-laws allow between 3 and 24     18.  In addition, (1) the
                             Viacom's Restated Certificate    directors to serve on its board.        size of the Board may only be
                             of Incorporation allows          CBS' By-laws authorize the board to     changed by the affirmative
                             between three and 20 directors   set the number of directors within      vote of at least 14
                             to serve on their board.         these limits.                           directors, (2) eight of the
                             Viacom's By-laws authorize the                                           directors serving as CBS
                             board to set the number of       CBS' board has set the number of        directors on September 6,
                             directors within the             directors at 11, increasing to 12 on    1999 (or any independent
                             parameters set by the Restated   December 1, 1999.                       director elected or appointed
                             Certificate of Incorporation.                                            prior to the effective time
                                                                                                      of the merger to serve as a
                                                                                                      CBS director) that are
                                                                                                      designated by CBS' board
                                                                                                      prior to the merger (or
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      J-2
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             Viacom's board has set the       Under the CBS By-laws, a majority of    replacements who are
                             number of directors at 10.       the directors must be independent       independent directors) will
                                                              directors.                              become members of Viacom's
                                                                                                      board at the effective time
                                                                                                      and (3) of the 10 directors
                                                                                                      on Viacom's board who are not
                                                                                                      CBS' board designees, two
                                                                                                      are directors who were first
                                                                                                      elected to serve on the
                                                                                                      Viacom board after 1993, are
                                                                                                      not members of the
                                                                                                      management of either Viacom
                                                                                                      or National Amusements, and,
                                                                                                      in the event they leave the
                                                                                                      board, must be replaced with
                                                                                                      disinterested, independent
                                                                                                      directors who are chief
                                                                                                      executive officers, chief
                                                                                                      operating officers or chief
                                                                                                      financial officers or former
                                                                                                      chief executive officers of
                                                                                                      a Fortune 500 company or a
                                                                                                      non-U.S. company of
                                                                                                      comparable size. Generally,
                                                                                                      for a period of three years
                                                                                                      following the merger, these
                                                                                                      provisions cannot be changed
                                                                                                      without the approval of at
                                                                                                      least 14 directors.

- ------------------------------------------------------------------------------------------------------------------------------------
Term of Office               Under Viacom's by-laws, each     Under CBS' Restated Articles of         Under Viacom's proposed new
                             director serves for a one-year   Incorporation, CBS may, but need not,   Restated Certificate of
                             term.                            create a classified board.  However     Incorporation and applicable
                                                              CBS has not done so and, under CBS'     law, all directors will serve
                                                              By-laws, each director's term expires   for a one-year term. Pursuant
                                                              at the next annual meeting.             to the National Amusements
                                                                                                      stockholder agreement, for
                                                                                                      the three-year period
                                                                                                      following the merger,
                                                                                                      National Amusements agreed to
                                                                                                      cause to be nominated and
                                                                                                      elected each CBS director (or
                                                                                                      replacements who are
                                                                                                      independent directors).
- ------------------------------------------------------------------------------------------------------------------------------------
Removal of Directors         Under Delaware law, any          Under Pennsylvania law, unless          After the effective time of
                             director may be removed from     otherwise provided in a by-law          the merger, any director may
                             office with or without cause     adopted by the shareholders, any        be removed with or without
                             by the affirmative vote of the   director may be removed from office     cause in accordance with
                             holders of a majority of the     by the shareholders with or without     Delaware law.  However,
                             shares of outstanding stock      cause by the affirmative vote of a      pursuant to the National
                             entitled to vote in the          majority of the votes cast with         Amusements stockholder
                             election of that director.       certain exceptions in the case of a     agreement, for the three-year
                                                              classified board.                       period following the merger,
                             Viacom's By-laws provide for                                             National Amusements has
                             the removal of directors in      Under CBS' Restated Articles of         agreed to take any action
                             accordance with Delaware law.    Incorporation and its By-laws,          necessary to ensure that no
                                                              directors may be removed by CBS'        CBS director is removed as a
                                                              shareholders without cause only by      director of Viacom unless
                                                              the affirmative vote of holders of at   such removal is for cause and
                                                              least 80% of the combined vote of the   is approved by at least 14
                                                              shares of outstanding stock entitled    members of Viacom's board.
                                                              to vote generally in an annual
                                                              election.
- ------------------------------------------------------------------------------------------------------------------------------------
Vacancies                    Under Viacom's By-laws,          Under CBS' By-laws, vacancies on the    Under Viacom's proposed new
                             vacancies on the Viacom board    CBS board may be filled by the board,   Restated Certificate of
                             shall be filled by the board     even if less than a quorum is           Incorporation, if one of the
                             only, even if less than a        present, or the CBS board may reduce    eight CBS directors vacates
                             quorum is present.               the size of the board. Vacancies may    his or her seat, the Viacom
                                                              also be filled                          board, subject to its
                                                                                                      fiduciary duties, is required
                                                                                                      to take all
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      J-3
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              by election by the shareholders.        action necessary to appoint as
                                                                                                      a successor a person
                                                                                                      designated by a majority of
                                                                                                      the remaining CBS directors.
                                                                                                      National Amusements has agreed
                                                                                                      in its shareholder agreement
                                                                                                      with CBS to vote for such
                                                                                                      designee.

                                                                                                      If one of the ten Viacom
                                                                                                      directors vacates his or her
                                                                                                      seat, the Viacom board will
                                                                                                      fill the vacancy.  However,
                                                                                                      if a directorship held by a
                                                                                                      person who is a director of
                                                                                                      Viacom first elected after
                                                                                                      1993 and is not management of
                                                                                                      Viacom or National
                                                                                                      Amusements, or the
                                                                                                      replacement of any such
                                                                                                      person, becomes vacant, the
                                                                                                      Viacom board, subject to its
                                                                                                      fiduciary duties, is required
                                                                                                      to take all action necessary
                                                                                                      to ensure that the vacancy is
                                                                                                      filled by a disinterested,
                                                                                                      independent person who is the
                                                                                                      chief executive officer,
                                                                                                      chief operating officer or
                                                                                                      chief financial officer or
                                                                                                      former chief executive
                                                                                                      officer of a Fortune-500
                                                                                                      company or a non-U.S. public
                                                                                                      company of comparable size.
                                                                                                      Generally, for a period of
                                                                                                      three years following the
                                                                                                      merger, these provisions
                                                                                                      cannot be changed without the
                                                                                                      approval of at least 14
                                                                                                      directors.
- ------------------------------------------------------------------------------------------------------------------------------------
Calling of Special Meeting   Under Delaware law, special      Under Pennsylvania law, for             Under Viacom's By-laws,
 of Shareholders             meetings of shareholders may     "registered corporations" such as       special meetings may be
                             be called by the board or by     CBS, special meetings of shareholders   called by the:
                             persons authorized to do so in   may be called only by the board, or
                             the certificate of               by the officers or other persons, if    . majority of the board;
                             incorporation or by-laws.        any, provided in the by-laws, except
                                                              that an Interested Shareholder (as      . chairman of the board;
                             Under Viacom's By-laws,          defined below for purposes of the
                             special meetings of              business combination moratorium under   . chief executive officer;
                             shareholders of Viacom may be    "Anti-Takeover Provisions") can call
                             called by the:                   a special meeting to approve certain    . vice chairman of the board;
                                                              business combinations.
                             . majority of the board;                                                 . president and chief
                                                              Under CBS' By-laws, special meetings      operating officer; or
                             . chairman of the board;         of shareholders of CBS may be called
                                                              only by:                                . chairman of the board, chief
                             . vice chairman of the board;                                              executive officer, the vice
                                                              . the CBS Board; or                       chairman of the board, the
                             . president; or                                                            president and chief
                                                              . the chairman of the Board.              operating officer or the
                             . chairman of the board, vice                                              secretary at the request of
                               chairman of the board,                                                   at least 50.1% of Viacom's
                               president or secretary at the  Under CBS' By-laws, the only business     Class A common stock.
                               request of at least 50.1% of   that may be conducted at a special
                               Viacom's Class A common stock. meeting is the business stated in the
                                                              notice of that special meeting
                             Under Viacom's By-laws, the      delivered
                             only

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</TABLE>

                                      J-4
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
- ------------------------------------------------------------------------------------------------------------------------------------
                             business that may be conducted   at the direction of the CBS
                             at a special meeting is the      Board or the chairman of the Board
                             business stated in the notice    and matters which are incidental or
                             of that special meeting.         germane thereto.
- ------------------------------------------------------------------------------------------------------------------------------------
Amendment to By-laws         Delaware law provides that the   Pennsylvania law provides that the      Under Viacom's proposed new
                             by-laws may be amended by an     by-laws may be amended by an action     Restated Certificate of
                             action of the shareholders.      of the shareholders. The by-laws may    Incorporation, during the
                             However, the certificate of      also give the power to amend the        three-year period following
                             incorporation may also give      by-laws to the board.                   the merger, any provisions of
                             the power to amend the by-laws                                           Article VIII of Viacom's
                             to the board.                    Pennsylvania law limits the board's     By-laws, which states that
                                                              power to amend the by-laws, however,    the By-laws are subject to
                             Viacom's Restated Certificate    in respect to certain matters, unless   Article XIII of the proposed
                             of Incorporation allows the      allowed by the articles of              new Restated Certificate of
                             board to repeal, alter or        incorporation.                          Incorporation, which contain
                             amend the by-laws by majority                                            the principal provisions
                             vote.                            Under CBS' Restated Articles of         setting forth the corporate
                                                              Incorporation and By-laws, CBS'         governance requirements
                                                              shareholders may amend the By-laws      relating to the merger, may
                                                              with the affirmative vote of holders    not be amended, repealed or
                                                              of at least 80% of the combined vote    waived by Viacom's board
                                                              of the shares entitled to vote          without the approval of at
                                                              generally in an annual election.        least 14 directors.

                                                              Also, CBS' Restated Articles of
                                                              Incorporation and By-laws allow the
                                                              board to repeal, alter or amend the
                                                              By-laws by majority vote of the
                                                              entire board.
- ------------------------------------------------------------------------------------------------------------------------------------
Amendments to certificate    Under Delaware law, any          Under Pennsylvania law, an amendment    Under Viacom's proposed new
 of incorporation            provision of the certificate     to the articles of incorporation        Restated Certificate of
                             of incorporation may be          requires the approval of the board      Incorporation, during the
                             amended by the approval of the   and, except in limited cases where a    three-year period following
                             board and the affirmative vote   greater vote may be required, the       the merger, any provisions of
                             of a majority of the holders     affirmative vote of a majority of the   Viacom's proposed new
                             of the combined voting power     votes cast by all shareholders          Restated Certificate of
                             of the outstanding stock         entitled to vote on the matter and      Incorporation which refer to
                             entitled to vote, and a          the affirmative vote of a majority of   Article VIII of Viacom's
                             majority of each class           the votes cast by all shareholders      By-laws and the provisions of
                             entitled to vote as a class.     within each class or series of shares   Article XIII of the proposed
                                                              if such class or series of shares is    new Restated Certificate of
                             Viacom's Restated Certificate    entitled to vote on the matter as a     Incorporation, which contain
                             of Incorporation provides that   class.                                  the principal provisions
                             amendments to the Restated                                               setting forth the corporate
                             Certificate of Incorporation     Also, Pennsylvania law provides that    governance arrangements
                             may be adopted as allowed by     shareholders of a registered            following the merger, may not
                             Delaware law.                    corporation, such as CBS, are not       be amended, repealed or
                                                              entitled to propose amendments to the   waived without the approval
                             No amendments to the Restated    articles of incorporation.              of at least 14 directors.
                             Certificate of Incorporation
                             require a supermajority vote.    Amendments to some provisions of the
                                                              CBS Restated Articles of
                                                              Incorporation require the approval of
                                                              holders of at least 80% of the
                                                              combined vote of the shares entitled
                                                              to vote generally in an
</TABLE>

                                      J-5
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              annual election, and certain other
                                                              amendments require such vote unless
                                                              first recommended and approved by a
                                                              majority of the entire board.  See
                                                              also "Approval of Certain Business
                                                              Combinations With Affiliates" above
                                                              for the required vote to amend that
                                                              provision.
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends                    Under Delaware law, a            Under Pennsylvania law, unless          See "Viacom Before the
                             corporation may pay dividends    restricted by the by-laws, a            Merger".
                             out of surplus or, if no         corporation may pay dividends unless
                             surplus exists, out of net       the payment would leave the
                             profits for the fiscal year in   corporation unable to pay its debts
                             which the dividends are          as they become due in the usual
                             declared and/or its preceding    course of business, or unless the
                             fiscal year.  However,           payment would leave the corporation
                             dividends may not be declared    with total assets that were less than
                             out of net profits if the        the sum of its total liabilities plus
                             capital of the corporation is    the amount that would be
                             less than the aggregate amount   distributable upon dissolution to
                             of capital represented by any    shareholders having senior rights.
                             issued and outstanding
                             preferred stock.
- ------------------------------------------------------------------------------------------------------------------------------------
Federal Communica-tion Laws  Viacom's Restated Certificate    The CBS Restated Articles of            See "Viacom Before the
                             of Incorporation provides that   Incorporation and By-laws do not        Merger".
                             it may request certain           contain special provisions with
                             information from the             respect to compliance with federal
                             shareholder or proposed          communications laws.
                             shareholder in order to
                             determine whether ownership of
                             Viacom's Class A or Class B
                             common stock is inconsistent
                             with, or in violation of, any
                             of the federal communication
                             laws.  If the necessary
                             information is not provided or
                             if Viacom finds that the
                             ownership of its Class A or
                             Class B common stock by a
                             shareholder or proposed
                             shareholder is inconsistent
                             with, or in violation of, any
                             of the federal communication
                             laws, Viacom may:

                             . refuse to permit the transfer
                               of shares of its Class A or
                               Class B common stock to the
                               proposed person or entity; or

                             . exercise any and all
                               appropriate remedies, at law
                               or in equity, against any
                               shareholder in order to obtain
                               the necessary information or
                               prevent or cure any situation
                               which would cause the
                               inconsistency with, or
                               violation of, the offending
                               provision of the federal
                               communications laws.

</TABLE>

                                      J-6
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
Conversion                   As long as 10,000 shares of      CBS' common stock has no conversion     See "Viacom Before the
                             Viacom's Class A common stock    features.                               Merger".
                             are outstanding, each record
                             holder of shares of Class A or
                             Class B common stock may
                             convert any or all of such
                             shares into an equal number of
                             shares of Class B common stock.
- ------------------------------------------------------------------------------------------------------------------------------------
Committees                   Under its by-laws, Viacom's      Under its By-laws, CBS' board is        All Committees.  Under
                             board may create one or more     required to create a compensation       Viacom's proposed new Restated
                             committees.  Each committee      committee, an audit review committee    Certificate of Incorporation,
                             would consist of one or more     and a nominating and governance         all committees, other than
                             of the directors of Viacom.      committee.  Each of these committees    the compensation committee
                                                              shall consist of not less than two      and the officers nominating
                                                              members of the board, at least two of   committee, must have the same
                                                              whom are required to be independent     proportion of CBS and Viacom
                                                              directors on the date of their          directors as the full Viacom
                                                              appointment.  CBS' By-laws require      board has, with a minimum of
                                                              that all members of the compensation    one CBS director on each
                                                              committee and the nominating and        committee.
                                                              governance committee be independent
                                                              directors on the date of their          Officers Nominating
                                                              appointment.  The CBS board can also    Committee.  Under Viacom's
                                                              create additional standing or special   proposed new Restated
                                                              committees of one or more members.      Certificate of Incorporation,
                                                                                                      Viacom will have an officers
                                                                                                      nominating committee and Mr.
                                                                                                      Karmazin will be the only
                                                                                                      member of this committee.
                                                                                                      This committee will have the
                                                                                                      powers to hire, elect,
                                                                                                      terminate, change positions,
                                                                                                      allocate responsibilities or
                                                                                                      determine non-equity
                                                                                                      compensations, with respect
                                                                                                      to the officers and
                                                                                                      employees.  However, this
                                                                                                      committee will not have these
                                                                                                      powers with respect to the
                                                                                                      chairman, the chief executive
                                                                                                      officer and the chief
                                                                                                      operating officer.

                                                                                                      This committee will not have
                                                                                                      the power to fill the
                                                                                                      positions of the chief
                                                                                                      financial officer, controller
                                                                                                      and general counsel without
                                                                                                      the approval of the board.
                                                                                                      However, this committee will
                                                                                                      have all of the other powers
                                                                                                      delegated to it for other
                                                                                                      officers with respect to the
                                                                                                      chief financial officer,
                                                                                                      controller and general
                                                                                                      counsel, including the power
                                                                                                      to terminate employment of
                                                                                                      persons holding those
                                                                                                      positions.

                                                                                                      Any decision of this
                                                                                                      committee can be overridden
                                                                                                      by the affirmative vote of at
                                                                                                      least 14 directors.

                                                                                                      Compensation Committee. Under
                                                                                                      Viacom's proposed new
                                                                                                      Restated Certificate of
                                                                                                      Incorporation, this committee
                                                                                                      shall consist of three CBS
                                                                                                      directors who are independent
                                                                                                      directors
</TABLE>

                                      J-7
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                                                                      and three directors
                                                                                                      who are not CBS directors.
                                                                                                      Of the three non-CBS
                                                                                                      directors, two will be
                                                                                                      persons who were first
                                                                                                      elected as directors of
                                                                                                      Viacom after 1993 and who are
                                                                                                      not management of Viacom or
                                                                                                      National Amusements and the
                                                                                                      third will be a disinterested
                                                                                                      independent director.

                                                                                                      This committee must approve
                                                                                                      the annual compensation of
                                                                                                      all other officers and
                                                                                                      employees and any equity or
                                                                                                      equity-based compensation of
                                                                                                      any officer or employee.
                                                                                                      However, this committee will
                                                                                                      not have the power to approve
                                                                                                      the annual compensation of:

                                                                                                      . any employee if the total
                                                                                                        value of such employee's
                                                                                                        annual cash compensation is
                                                                                                        less than $1 million; or

                                                                                                      . any talent, as such term is
                                                                                                        commonly used in the media
                                                                                                        or entertainment industries.

                                                                                                      These powers will be
                                                                                                      delegated to the officers
                                                                                                      nominating committee.
                                                                                                      Generally, for a period of
                                                                                                      three years following the
                                                                                                      merger, these provisions
                                                                                                      cannot be changed without the
                                                                                                      approval of at least 14
                                                                                                      directors.
- ------------------------------------------------------------------------------------------------------------------------------------
Officers                     Under Viacom's By-laws,          Under its By-laws, CBS' board shall     Chairman and Chief Executive
                             Viacom's board shall elect a     elect a chairman, who may be            Officer. Under Viacom's
                             president, a treasurer and a     designated an officer of CBS, a         proposed new Restated
                             secretary.  The board may also   president or a chief executive          Certificate of Incorporation,
                             elect a chairman, one or more    officer or both, such vice presidents   Sumner Redstone will serve as
                             vice chairmen and vice           as may from time to time be necessary   chairman and chief executive
                             presidents and one or more       or desirable, a secretary and a         officer of Viacom and Mel
                             assistant treasurers and         treasurer. There shall also be one or   Karmazin will serve as
                             assistant secretaries.  Any      more assistant secretaries and          president and chief operating
                             number of officers may be held   treasurers and such other officers      officer of Viacom.  If Mr.
                             by the same person, except the   and assistant officers as the board     Redstone is not the chief
                             offices of president and         may deem appropriate.  The board        executive officer at the
                             secretary. Vice presidents may   shall elect all officers, except        effective time of the merger
                             be given distinctive             assistant officers. The term of         or ceases to be the chief
                             designations such as executive   office for all officers shall be        executive officer at any time
                             vice president or senior vice    until the organization meeting of the   during the three-year period
                             president.  The board may        board following the next annual         following the merger, Mr.
                             elect other officers and         meeting of shareholders and until       Karmazin will become the
                             agents as it deems necessary.    their respective successors are         chief executive officer while
                             The officers shall hold office   elected or appointed and shall          retaining his title and
                             until their successors are       qualify, or until their earlier         responsibilities as chief
                             elected or appointed and         death, resignation or removal.  The     operating officer.  The chief
                             qualify or until their earlier   chairman or any officer may be          executive officer shall be
                             resignation or removal.  Any     removed from office, either with or     responsible, in consultation
                             officer elected or appointed     without cause, at any time by the       with the chief operating
                             by the board may be removed at                                           officer, for corporate policy
                             any time with                                                            and strategy and the chief
                                                                                                      operating officer shall
                                                                                                      consult on all major
                                                                                                      decisions with, and shall
                                                                                                      report directly to, the chief
                                                                                                      executive officer.  However,
                                                                                                      unless
</TABLE>

                                      J-8
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>

                             or without cause                 affirmative vote of the majority of     Mr. Karmazin is the
                             by the affirmative vote of a     the members of the board then in        chief executive officer, the
                             majority of the whole board.     office.                                 chief executive officer will
                                                                                                      not exercise any powers,
                                                                                                      rights, functions or
                                                                                                      responsibilities of the chief
                                                                                                      operating officer.

                                                                                                      President and Chief Operating
                                                                                                      Officer. Under Viacom's
                                                                                                      proposed new Restated
                                                                                                      Certificate of Incorporation,
                                                                                                      Mr. Karmazin will also serve
                                                                                                      as president as well as chief
                                                                                                      operating officer.  Mr.
                                                                                                      Karmazin may not be
                                                                                                      terminated or demoted from
                                                                                                      his position as chief
                                                                                                      operating officer or chief
                                                                                                      executive officer, if he is
                                                                                                      serving in that capacity, and
                                                                                                      none of his functions as
                                                                                                      chief operating officer may
                                                                                                      be changed without the
                                                                                                      affirmative vote of at least
                                                                                                      14 directors.

                                                                                                      The chief operating officer
                                                                                                      will:

                                                                                                      . supervise, coordinate and
                                                                                                        manage Viacom's business,
                                                                                                        operations, activities,
                                                                                                        operating expenses and
                                                                                                        capital allocation;

                                                                                                      . handle matters relating to
                                                                                                        officers (other than the
                                                                                                        chief executive officer and
                                                                                                        chief operating officer) and
                                                                                                        employees including hiring,
                                                                                                        terminating, changing
                                                                                                        positions and allocating
                                                                                                        responsibilities, other than
                                                                                                        (a) specific board authority
                                                                                                        with respect to the chief
                                                                                                        financial officer, the
                                                                                                        general counsel and the
                                                                                                        controller and (b) the
                                                                                                        authority of the officers
                                                                                                        nominating committee and the
                                                                                                        compensation committee; and

                                                                                                      . hold substantially all of
                                                                                                        the powers, rights,
                                                                                                        functions and
                                                                                                        responsibilities typically
                                                                                                        exercised by a chief
                                                                                                        operating officer.

                                                                                                      All officers (other than the
                                                                                                      chairman, chief executive
                                                                                                      officer and chief operating
                                                                                                      officer) will report,
                                                                                                      directly or
</TABLE>

                                      J-9
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                                                                      indirectly, to
                                                                                                      the chief operating officer.

                                                                                                      If Mr. Karmazin is not the
                                                                                                      chief operating officer or
                                                                                                      chief executive officer, the
                                                                                                      Viacom board may terminate
                                                                                                      the chief operating officer,
                                                                                                      eliminate that position and
                                                                                                      the officers nominating
                                                                                                      committee and reallocate the
                                                                                                      functions of those positions
                                                                                                      to whom the officers will
                                                                                                      report.

                                                                                                      Vice Presidents, Secretary,
                                                                                                      Assistant Secretary,
                                                                                                      Treasurer and Assistant
                                                                                                      Treasurer.  Under Viacom's
                                                                                                      By-laws, the president and
                                                                                                      chief operating officer may
                                                                                                      assign additional duties to
                                                                                                      the vice presidents,
                                                                                                      secretary, assistant
                                                                                                      secretary, treasurer and
                                                                                                      assistant treasurer.
                                                                                                      Generally, for a period of
                                                                                                      three years following the
                                                                                                      merger, these provisions
                                                                                                      cannot be changed without the
                                                                                                      approval of at least 14
                                                                                                      directors.
- ------------------------------------------------------------------------------------------------------------------------------------
Shareholder Action           Under Delaware law, unless the   Under Pennsylvania law, unless          See "Viacom Before the
                             certificate of incorporation     otherwise restricted by the by-laws,    Merger".
                             provides otherwise, a            a shareholder action may be taken
                             shareholder action may be        without a meeting upon the unanimous
                             taken if written consents are    written consent of all of the
                             received from the holders of     shareholders entitled to vote
                             the minimum number of votes      thereon. Shareholders of a registered
                             that would be necessary to       corporation, such as CBS, may
                             authorize that action at a       authorize an action without a meeting
                             meeting at which all the         by less than unanimous written
                             shares entitled to vote for      consent only if such action without a
                             that action were present and     meeting is permitted by the articles
                             voted.  Viacom's Restated        of incorporation.  CBS' Restated
                             Certificate of Incorporation     Articles of Incorporation do not
                             does not restrict the ability    provide for a partial written
                             of shareholders to act by        consent; and CBS' By-laws do not
                             written consent.                 restrict shareholder action by
                                                              unanimous written consent.
- ------------------------------------------------------------------------------------------------------------------------------------
Notice of Some Shareholder   Neither Viacom's Restated        Under CBS' By-laws, for nominations     See "Viacom Before the
 Actions                     Certificate of Incorporation     for the election of directors to be     Merger".
                             nor its By-laws require          properly brought by a shareholder
                             shareholders to give Viacom      before an annual meeting or a special
                             advance notice of director       meeting at which directors are to be
                             nominations or business to be    elected pursuant to CBS' notice of
                             presented at an annual or        meeting, or for other business to be
                             general shareholders' meeting.   properly brought by a shareholder
                                                              before an annual meeting, the
                                                              shareholder must have given timely
                                                              notice thereof in writing to CBS'
                                                              secretary and the shareholder must be
                                                              entitled by Pennsylvania law to
                                                              present such business at the meeting
                                                              and must
</TABLE>

                                      J-10
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              be a shareholder of record
                                                              at the time the required notice is
                                                              given and at the time of the meeting.
                                                              To be timely, a shareholder's notice
                                                              must be delivered to CBS' secretary
                                                              at CBS' principal executive offices:

                                                              .in the case of an annual meeting,
                                                               for receipt not less than 90 days nor
                                                               more than 120 days prior to the first
                                                               anniversary of the preceding year's
                                                               annual meeting (provided, if the date
                                                               of the annual meeting is advanced
                                                               more than 30 days or delayed more
                                                               than 90 days from the anniversary
                                                               date, the notice can be as late as
                                                               the 10th day following public
                                                               announcement of the meeting date); and

                                                              .with respect to the nomination of a
                                                               person or persons for election to
                                                               such position(s) as are specified in
                                                               CBS' notice of meeting in the case of
                                                               a special meeting, for receipt no
                                                               more than 120 days prior to the date
                                                               of such special meeting and no later
                                                               than the 90th day prior to the date
                                                               of such special meeting or the 10th
                                                               day following the day on which public
                                                               announcement is first made of the
                                                               date of the special meeting and of
                                                               the nominees proposed by the board to
                                                               be elected at such meeting.

                                                              In no event will the public
                                                              announcement of an adjournment or
                                                              postponement of an annual or special
                                                              meeting commence a new time period
                                                              for the giving of a shareholder's
                                                              notice. Such shareholder's notice
                                                              shall include:

                                                              .certain information relating to the
                                                               relationship, if any, between the
                                                               shareholder and the nominee being
                                                               proposed, the nominee's written
                                                               consent, and the information required
                                                               to be disclosed under the Exchange
                                                               Act;

                                                              .a brief description of the business
                                                               desired to be brought before the
                                                               meeting and the reasons therefor and
                                                               any material interest of the
</TABLE>

                                      J-11
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              shareholder and the beneficial owner
                                                              therein; and

                                                              .as to the shareholder giving the
                                                               notice and as to the beneficial
                                                               owner, if different from the
                                                               shareholder giving  notice, on whose
                                                               behalf the nomination or proposal is
                                                               made, the name and address and number
                                                               of shares held by the shareholder and
                                                               beneficial owner, and a
                                                               representation by the shareholder as
                                                               to the intent to hold such shares
                                                               until the meeting and to attend the
                                                               meeting and make the proposal.
- ------------------------------------------------------------------------------------------------------------------------------------
Shareholder Appraisal        Delaware law provides for        Pennsylvania law provides, with         See "Viacom Before the
 Rights                      appraisal rights on the part     certain exceptions, that shareholders   Merger".
                             of the shareholders of a         of a corporation have a right to
                             corporation only in the case     dissent from a proposed transaction
                             of certain mergers or            and to obtain payment of the
                             consolidations and not in the    judicially determined "fair value" of
                             case of other mergers, sales     their shares in a merger,
                             or transfers of all or           consolidation, division, share
                             substantially all of a           exchange or conversion, in certain
                             corporation's assets or          asset transfers, in transactions
                             amendments to a corporation's    where the board grants dissenters
                             certificate of incorporation.    rights, and in certain other plans or
                             Moreover, unless the             amendments to the articles of
                             certificate of incorporation     incorporation in which disparate
                             so provides, Delaware law does   treatment is given to the holders of
                             not provide for appraisal        shares of the same class or series
                             rights in connection with a      unless each group has approved by a
                             merger or consolidation for      special class vote. These dissenters'
                             stock listed on a national       rights are not available, however,
                             securities exchange or           for any class of stock that is either
                             designated as a national         listed on a national securities
                             market system security on the    exchange or held of record by more
                             Nasdaq stock market or held of   than 2,000 shareholders (as is the
                             record by more than 2,000        case with CBS common stock) unless
                             shareholders, unless the         (a) the shares are not converted
                             agreement of merger or           solely into shares of the acquiring,
                             consolidation requires the       surviving, new or other corporation,
                             holders of the stock to          or solely into such shares combined
                             receive, in exchange for their   with cash for any fractional shares;
                             shares, any property other       (b) the shares being converted are
                             than shares of stock of the      shares of any preferred or special
                             surviving corporation, shares    class of stock, unless the articles
                             of stock of any other            of incorporation, the plan, or the
                             corporation listed on a          terms of the transaction entitle all
                             national securities exchange     holders of the shares of the
                             or designated as a national      preferred or special class to vote on
                             market system security on the    the transaction and require the
                             Nasdaq stock market or held of   approval of the affirmative vote of a
                             record by more than 2,000        majority of the votes cast by all
                             holders, cash instead of         shareholders of the preferred or
                             fractional shares or any         special class; or (c) (1) the
                             combination of the foregoing.    transaction provides for disparate
                             Viacom's Restated Certificate    treatment for shares of the same
                             of Incorporation does not        class or series,
                             provide for appraisal rights
                             in these circumstances.  In
                             addition, Delaware law denies
                             appraisal rights to the
                             shareholders of the surviving
                             corporation in a merger if the
                             merger did not require the
                             approval of the
</TABLE>

                                      J-12
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             shareholders                     (2) the shares being
                             of the surviving corporation.    converted are a group of a class or
                                                              series of shares which are to receive
                                                              the same special treatment in the
                                                              transaction, and (3) the group is not
                                                              entitled to vote as a special class
                                                              for such transaction.
- ------------------------------------------------------------------------------------------------------------------------------------
Fiduciary Duties of          Under Delaware law, the          Under Pennsylvania law, directors       See "Viacom Before the
 Directors                   business and affairs of a        have a fiduciary duty to their          Merger".
                             corporation are managed by or    corporation and are required to
                             under the direction of its       perform their duties in good faith,
                             board.  In exercising their      in a manner they reasonably believe
                             powers, directors are charged    to be in the best interests of the
                             with the fiduciary duties of     corporation, and with the care,
                             loyalty and care to both the     including reasonable inquiry, skill
                             corporation and the              and diligence, that a person of
                             shareholders.  A party           ordinary prudence would use under
                             challenging the decision of a    similar circumstances.  Directors, in
                             board generally bears the        considering the best interests of
                             burden of rebutting the          their corporation, may, but are not
                             so-called "business judgment     required to, consider the effects of
                             rule," a presumption that, in    any action upon employees, suppliers
                             making a business decision,      and customers of the corporation, and
                             directors acted on an informed   upon communities in which offices or
                             basis, in good faith and in      other establishments of the
                             the honest belief that the       corporation are located and all other
                             action was taken in the best     pertinent factors. Under Pennsylvania
                             interests of the corporation.    law, absent a breach of fiduciary
                             Unless this presumption is       duty, a lack of good faith or
                             rebutted, the business           self-dealing, any act of the board, a
                             judgment exercised by            committee of the board or an
                             directors in making their        individual director is presumed to be
                             decisions is not subject to      in the best interests of the
                             judicial review.  To rebut       corporation. The Pennsylvania Supreme
                             this presumption, a party must   Court has recognized the common law
                             demonstrate that, in reaching    "business judgment rule".
                             their decision, the directors    Pennsylvania courts have not imposed
                             breached one or more of their    any heightened obligations on
                             fiduciary duties.  If the        directors to justify their conduct in
                             presumption is so rebutted,      the context of a potential or
                             the directors bear the burden    proposed acquisition of control or
                             of demonstrating the entire      required directors to maximize the
                             fairness of the relevant         short-term financial return to
                             transaction.  Notwithstanding    shareholders.
                             the foregoing, Delaware courts
                             may subject directors'
                             defensive actions taken in
                             response to a threat to
                             corporate control or their
                             approval of a
                             change-of-control transaction
                             to enhanced scrutiny and may
                             require the directors to
                             maximize the short-term
                             financial interests of
                             shareholders.
- ------------------------------------------------------------------------------------------------------------------------------------
Limitation of Personal       Delaware law permits a           Under Pennsylvania law, a corporation   See "Viacom Before the
 Liability of Directors      corporation to include in its    may include in its by-laws a            Merger".
                             certificate of incorporation a   provision which eliminates the
                             provision that limits or         liability of its directors for
                             eliminates the liability of      monetary damages for any action taken
                             its directors to the             or the failure to take any action,
                             corporation or its               unless (a) the directors have
                             shareholders for monetary        breached or failed to perform their
                             damages arising from a breach    duties and (b) the breach or failure
                             of fiduciary duty, except        to perform constitutes self-dealing,
                             under certain circumstances.     willful misconduct or recklessness.
                             Some of these circumstances      However, a Pennsylvania corporation
                             would include a breach of the    may not eliminate the liability of
                             duty of loyalty to the           directors where
                             corporation or its
                             shareholders, acts or
                             omissions not in good faith or
                             which involve
</TABLE>

                                      J-13
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             intentional misconduct or a      the responsibility or liability
                             knowing violation of law, an     of a director arises under any
                             unlawful declartion of a         criminal statute or is for the
                             declaration of a dividend or     payment of federal, state or local
                             unlawful authorization of the    taxes.  CBS' Restated Articles of
                             repurchase or redemption of      Incorporation and By-laws eliminate
                             stock or any transaction from    director liability to the fullest
                             which the director derived an    extent permitted by Pennsylvania law.
                             improper personal benefit.
                             Viacom's Restated Certificate
                             of Incorporation eliminates
                             director liability to the
                             fullest extent permitted by
                             Delaware law.
- ------------------------------------------------------------------------------------------------------------------------------------
Indemnification of           Under Delaware law, a            The provisions of Pennsylvania law      See "Viacom Before the
 Directors and Officers      corporation may indemnify a      regarding indemnification are           Merger".
                             director or officer of the       substantially similar to those of
                             corporation against expenses,    Delaware law.  Unlike Delaware law,
                             including attorneys' fees,       however, Pennsylvania law expressly
                             judgments, fines and             permits indemnification in connection
                             settlement amounts actually      with any action, including a
                             and reasonably incurred in a     derivative action, unless a court
                             civil or criminal action, suit   determines that the acts or omissions
                             or proceeding by reason of       giving rise to the claim constituted
                             being or having been a           willful misconduct or recklessness.
                             representative of or serving
                             at the request of the            CBS' Restated Articles of
                             corporation.  This               Incorporation and By-laws provide for
                             indemnification is available     broad indemnification of directors
                             if the person acted in good      and officers.  However, CBS' By-laws
                             faith and reasonably believed    specifically state that there will be
                             that his or her actions were     no indemnification where the
                             in or not opposed to the best    indemnitee initiates the claim,
                             interests of the corporation     except for a claim to enforce by-law
                             and, in a criminal proceeding,   indemnification rights. The By-laws
                             had no reasonable cause to       provide for the advancement of
                             believe that his or her          certain expenses if the person
                             conduct was unlawful.  In an     seeking indemnification agrees to
                             action brought by or on behalf   repay all amounts advanced if it is
                             of the corporation, this         later determined that such person is
                             indemnification is limited to    not entitled to be indemnified
                             expenses incurred.  Delaware     pursuant to the By-laws against such
                             law also provides that a         expenses.
                             corporation may advance a
                             director, officer, employee or
                             agent the expenses incurred in
                             defending any action, but
                             that, in the case of advances
                             to directors or officers the
                             corporation must first receive
                             an undertaking from the
                             officer or director to repay
                             the amount advanced if it is
                             ultimately determined that the
                             person is not entitled to
                             indemnification.  A
                             determination of the amount of
                             the indemnification to be paid
                             in any circumstance must be
                             made by a majority of the
                             directors who are not parties
                             to the action, even though
                             less than a quorum, by a
                             committee of such
                             disinterested directors or, if
                             there are no such directors or
                             if such directors so direct,
                             by independent legal counsel.
                             No indemnification for
                             expenses in derivative actions
                             is permitted under Delaware
                             law if the person is found to
                             be liable to the corporation,
                             unless a
</TABLE>

                                      J-14
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             court finds him or
                             her entitled to such
                             indemnification.  If, however,
                             that person is successful, on
                             the merits or otherwise, in
                             defending a third-party or
                             derivative action,
                             indemnification for expenses
                             incurred is mandatory.  The
                             indemnification provisions of
                             Delaware law are not exclusive
                             of any other rights to which
                             the party may be entitled
                             under any by-law, agreement or
                             vote of shareholders or
                             disinterested directors.

                             Viacom's Restated Certificate
                             of Incorporation provides for
                             mandatory indemnification of
                             its directors, officers,
                             employees or agents to the
                             fullest extent provided by
                             law.  However, Viacom will not
                             indemnify
                             a person who was adjudged to
                             be liable to Viacom, unless
                             the court decides that such
                             person is entitled to Viacom's
                             indemnity.  Viacom's Restated
                             Certificate of Incorporation
                             provides for the advancement
                             of expenses for its directors
                             and officers if they agree to
                             repay all amounts advanced if
                             it is later ultimately
                             determined that they are not
                             entitled to be indemnified.
                             In addition, Viacom's Restated
                             Certificate of Incorporation
                             provides for the advancement
                             of  expenses for its employees
                             and agents as Viacom deems it
                             appropriate.
- ------------------------------------------------------------------------------------------------------------------------------------
Anti-Takeover Provisions     Under Delaware law, a            Pennsylvania law contains several       See "Viacom Before the
                             corporation is prohibited from   anti-takeover provisions which apply    Merger".
                             engaging in any "business        to registered corporations such as
                             combination" with an             CBS.
                             "interested shareholder,"
                             which is defined as a person     Transactions with Interested
                             who, together with affiliates    Shareholders.  Pennsylvania law
                             or associates, owns, or within   provides that the types of
                             a three-year period did own,     transactions listed below must be
                             15% or more of the               approved by the affirmative vote of
                             corporation's voting stock for   at least a majority of the votes that
                             a period of three years          all shareholders are entitled to cast
                             following the date on which      with respect to such transaction,
                             the shareholder became an        excluding all voting shares owned by
                             interested shareholder, unless:  an interested shareholder.  An
                                                              interested shareholder generally
                             .the certificate of              means, for purposes of this
                             incorporation provides           provision, a shareholder who is a
                             otherwise;                       party to the transaction or who is
                                                              treated differently from other
                             .prior to the date on which      shareholders, together with their
                             the person became an             affiliates.  The following types of
                             interested shareholder, the      transactions require the special vote
                             board approved either the        described above:
                             business combination or the
                             transaction which resulted in
                             the shareholder becoming an
                             interested
</TABLE>

                                      J-15
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             shareholder;                     .a merger or consolidation, a share
                                                               exchange or certain sales of assets
                                                               between a corporation or its
                                                               subsidiary and a shareholder of the
                             .the interested shareholder       corporation;
                              owned 85% or more of the
                              voting stock of the             .a division of the corporation, if an
                              corporation, excluding           interested shareholder is to receive
                              specified shares, upon           a disproportionate amount of any of
                              completion of the transaction    the securities of any corporation
                              as the result of which the       surviving or resulting from the
                              person became an interested      division;
                              shareholder; or
                                                              .a voluntary dissolution of the
                             .on or after the date on which    corporation, if any shareholder is to
                              such person became an            be  treated differently  from others
                              interested shareholder, the      holding shares of the same class
                              business combination is          (other than dissenters' rights); or
                              approved by the board and the
                              affirmative vote, at a special  .a reclassification, if any
                              meeting and not by written       shareholder's percentage of voting or
                              consent, of at least 66 2/3% of  economic share interest in the
                              the outstanding voting shares    corporation is materially increased
                              of the corporation, excluding    relative to substantially all other
                              shares held by such interested   shareholders.
                              shareholder.
                                                              The special voting requirement with
                             A "business combination"         respect to the above types of
                             includes:                        transactions does not apply if:

                             .mergers, consolidations  and    .the proposed transaction has been
                              sales or other dispositions      approved by a majority of the
                              of 10% or more of the assets     corporation's board, excluding
                              of a corporation to or with      directors affiliated with or
                              an interested shareholder;       nominated by the interested
                                                               shareholder;

                             .certain transactions            .the consideration received for each
                              resulting in the issuance or     class of stock owned by the
                              transfer to an interested        interested shareholder is at least as
                              shareholder of any stock of      high as the highest consideration
                              such corporation or its          paid for that class by the interested
                              subsidiaries; and                shareholder; or

                             .other transactions resulting    .the transaction is a merger or
                              in a disproportionate            consolidation involving a parent
                              financial benefit to an          corporation which owns at least 80%
                              interested shareholder.          of each class of the stock of each
                                                               other constituent party.
                             Delaware law does not contain
                             a "control-share acquisition"    Business Combination Moratorium.
                             statute similar to that          Pennsylvania law provides for a
                             contained in Pennsylvania law.   five-year moratorium on business
                                                              combinations with a registered
</TABLE>

                                      J-16
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              corporation by an interested
                                                              shareholder after the date such
                                                              person first becomes an interested
                                                              shareholder.  For this purpose,
                                                              interested shareholder generally
                                                              means someone who owns stock with 20%
                                                              or more of the combined vote of
                                                              shares entitled to elect directors or
                                                              who held such amount in the last five
                                                              years and is still an affiliate.

                                                              Following the expiration of the
                                                              five-year moratorium, a business
                                                              combination with that interested
                                                              shareholder must be approved by
                                                              either:

                                                              .a majority of the shares not held by
                                                               the interested shareholder or its
                                                               affiliates and associates; or

                                                              .a majority of the shares cast
                                                               including those shares held by the
                                                               interested shareholder, and the
                                                               business combination (a) must meet
                                                               certain fair price criteria and (b)
                                                               the interested shareholder cannot
                                                               have increased its holdings during
                                                               the five-year period.

                                                              "Business combinations" include:

                                                              .mergers, consolidations, share
                                                               exchanges or divisions of a
                                                               registered corporation or its
                                                               subsidiary:  with an interested
                                                               shareholder; or with, involving or
                                                               resulting in any other corporation
                                                               which is, or after such merger,
                                                               consolidation, share exchanges or
                                                               division would be, an affiliate or
                                                               associate of such interested
                                                               shareholder;

                                                              .a sale, lease, exchange, mortgage,
                                                               pledge, transfer or other disposition
                                                               to or with an interested shareholder
                                                               or any affiliate or associate of an
                                                               interested shareholder of  assets of
                                                               the corporation or any subsidiary
                                                               having a value equal to at least 10%
                                                               of (a) the assets, (b) all the
                                                               outstanding shares or (c) the earning
                                                               power or net income on a consolidated
                                                               basis, of such registered corporation
                                                               or its
</TABLE>

                                      J-17
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              subsidiary;

                                                              .the adoption of a plan of
                                                               liquidation or dissolution proposed
                                                               by the interested shareholder or its
                                                               affiliates or associates; and

                                                              .other specified self-dealing
                                                               transactions between such registered
                                                               corporation and an interested
                                                               shareholder or any affiliate or
                                                               associate thereof.

                                                              The five-year moratorium does not
                                                              apply to:

                                                              .business combinations with persons
                                                               who became interested shareholders
                                                               with the prior approval of the board;

                                                              .business combinations that were
                                                               approved by the board prior to the
                                                               date on which the shareholder became
                                                               an interested shareholder;

                                                              .business combinations approved by
                                                               all of the holders of the outstanding
                                                               common shares; and

                                                              .business combinations approved by a
                                                               majority of the  voting shares, not
                                                               including any voting shares
                                                               beneficially owned by the interested
                                                               shareholder or any affiliate or
                                                               associate of the interested
                                                               shareholder, at a meeting called for
                                                               such purpose no earlier than three
                                                               months after the date the interested
                                                               shareholder became the beneficial
                                                               owner of 80% of the voting shares,
                                                               provided that the interested
                                                               shareholder continues to beneficially
                                                               own 80% of the voting shares at the
                                                               time of such meeting and certain fair
                                                               price criteria are met and the
                                                               interested shareholder has not
                                                               increased its holdings.

                                                              Shareholder Right to Have Shares
                                                              Purchased in Control Transactions.
                                                              Under Pennsylvania law, when a person
                                                              or group of persons acting together
                                                              holds 20% of the shares entitled to
                                                              vote in the election of directors,
                                                              any other
</TABLE>

                                      J-18
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                                                              holder of voting shares of
                                                              the registered corporation who
                                                              objects can, within a reasonable time
                                                              after the control person or group of
                                                              persons acquires the 20% stake,
                                                              require the control group to purchase
                                                              his or her shares at a fair value.
                                                              Fair value is defined as not less
                                                              than the highest price per share paid
                                                              by the control person at any time
                                                              during the 90-day period ending on
                                                              the date of the control transaction
                                                              plus any value, including any value
                                                              paid or payable for the acquisition
                                                              of control, that may not be reflected
                                                              in such price.
- ------------------------------------------------------------------------------------------------------------------------------------
Rights Plan                  Viacom does not have a rights    On December 29, 1995, the board of      See "Viacom Before the
                             plan.                            directors of CBS adopted a              Merger".
                                                              shareholder rights plan providing for
                                                              the distribution of one right for
                                                              each share of its common stock
                                                              outstanding on January  9, 1996 or
                                                              issued thereafter until the
                                                              occurrence of certain events. The
                                                              rights become exercisable only in the
                                                              event, with certain exceptions, that
                                                              an acquiring party accumulates 15% or
                                                              more of CBS' voting stock or a party
                                                              announces an offer to acquire 30% or
                                                              more of CBS' voting stock. The rights
                                                              will not become exercisable as a
                                                              result of the merger because of prior
                                                              approval of the merger by the board
                                                              of directors of CBS.  The rights
                                                              initially have an exercise price of
                                                              $64 per share and expire on January
                                                              9, 2006; however, the CBS Board has
                                                              adopted a resolution affirming its
                                                              intention to redeem the rights in
                                                              January 2001 if still outstanding.
                                                              Upon the occurrence of certain
                                                              events, holders of the rights will be
                                                              entitled to purchase either CBS
                                                              preferred shares or shares in an
                                                              acquiring entity at half of market
                                                              value. CBS is entitled to redeem the
                                                              rights at a value of $.01 per right
                                                              at any time until the tenth day
                                                              following the acquisition of a 15%
                                                              position in its voting stock.
- ------------------------------------------------------------------------------------------------------------------------------------
Rights of Inspection         Under Delaware law, every        Under Pennsylvania law every            See "Viacom Before the
                             shareholder, upon proper         shareholder, upon proper written        Merger".
                             written demand stating the       demand stating the purpose, may
                             purpose, may inspect the         inspect the corporate books and
                             corporate books and records as   records as long as the inspection is
                             long as the inspection is for    for a proper purpose and during
                             a proper purpose and during      normal business hours.  A "proper
                             normal business hours.  A        purpose" is any purpose reasonably
                             "proper purpose" is any          related to the
                             purpose reasonably related to
                             the interest of the
</TABLE>

                                      J-19
<PAGE>

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                                                             Combined Company
Shareholder Rights              Viacom Before the Merger              CBS Before the Merger                 Shareholder Rights
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                              <C>                                     <C>
                             inspecting person as a           interest of the inspecting person
                             shareholder.                     as a shareholder.
- ------------------------------------------------------------------------------------------------------------------------------------
Liquidation Rights           The rights of the holders of     Holders of shares of CBS' common        See "Viacom Before the
                             shares of Viacom's common        stock upon the liquidation or           Merger".
                             stock upon the liquidation or    dissolution of CBS have the right to
                             dissolution of Viacom are        receive (on a parity with any
                             substantially the same as        preferred stock ranking on a parity
                             those of the holders of shares   with the common for this purpose) any
                             of CBS' common stock upon the    surplus that remains after paying or
                             liquidation or dissolution of    providing for all liabilities of CBS
                             CBS.                             and after all distributions have been
                                                              made to stock having a preference to
                                                              the common with respect to
                                                              liquidation/dissolutions.
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>




                                      J-20
<PAGE>



                          Preliminary Proxy Materials

                                CBS CORPORATION

       Proxy solicited by the Board of Directors for Special Meeting of
                       Shareholders, ____________, 1999
        (See Joint Proxy Statement/Prospectus for discussion of item.)

The undersigned appoints ______, ______ and ______, and each of them, jointly
and severally, as proxies, with power of substitution, to vote all shares of CBS
Corporation common stock which the undersigned is entitled to vote on all
matters which may properly come before the Special Meeting of Shareholders of
CBS Corporation to be held at __________ on ______ __, 1999, beginning at ____
a.m. eastern standard time, or any adjournment thereof, including upon matters
set forth in the Notice of Special Meeting dated ______ __, 1999, and the
related joint proxy statement/prospectus, copies of which have been received by
the undersigned, and in their discretion upon any adjournment of the meeting.
Attendance of the undersigned at the meeting or any adjourned session of the
meeting will not be deemed to revoke this proxy unless the undersigned
affirmatively indicates the intention of the undersigned to vote the shares
represented by this proxy in person before the exercise of this proxy.


                                          (change of address)

                                       -----------------------------------------

                                       -----------------------------------------

                                       -----------------------------------------

                                       -----------------------------------------
                                       If you have written in the above space,
                                       please mark the corresponding box on the
                                       reverse side of this card.


                              CBS CORPORATION
                              P. O. BOX 11004
                              NEW YORK, N.Y. 10203-0004


You are encouraged to specify your choices by marking the appropriate boxes on
the reverse side.  The proxies cannot vote your shares unless you sign and
return this proxy card.

(Continued, and to be signed and dated, on the reverse side.)



<PAGE>

(continued from other side)

                          PRELIMINARY PROXY MATERIALS

                            DETACH PROXY CARD HERE

- --------------------------------------------------------------------------------
             THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR ITEM 1.
- --------------------------------------------------------------------------------

1. To adopt the Agreement and Plan of Merger, dated as of September 6, 1999,
between CBS Corporation and Viacom Inc., a Delaware corporation.

FOR  [ ]    AGAINST  [ ]   ABSTAIN  [ ]

The shares represented by this Proxy Card will be voted as specified above, but
of no specification is made they will be voted FOR Item 1 and at the discretion
of the proxies on any other matter that may properly come before the meeting.

Please sign, date and return promptly in the accompanying envelope.

Note: Please sign exactly as name appears hereon. Joint owners should each sign.
When signing as attorney, director, administrator, trustee or guardian, give
full name and title as such.


- --------------------------------------------------------------------------------
                          Signature of Share Owner(s)

- --------------------------------------------------------------------------------
                          Signatire of Share Owner(s)

Dated:                                                                     ,1999
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Votes MUST be indicated
(x) in black or blue ink.    [_]


To change your address, mark this box and correct on reverse side.

                                      [ ]

If you plan to attend the Special Meeting, please check this box.

                                      [ ]


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