Tax Matters Agreement - Viacom Inc. and Blockbuster Inc.


                             TAX MATTERS AGREEMENT
                             ---------------------

          THIS TAX MATTERS AGREEMENT (the 'Agreement'), dated as of August 16,
1999 (the 'IPO Date'), is entered into between Viacom Inc., a Delaware
corporation ('Viacom'), and Blockbuster Inc., a Delaware corporation,
('Blockbuster').

                                R E C I T A L S
                                ---------------

          A.  Viacom is the common parent corporation of an affiliated group of
corporations which, together with any other corporations which may become
members of such affiliated group, is referred to as the 'Viacom Consolidated
Group'.

          B.  Blockbuster, if it were not included in the Viacom Consolidated
Group on the date hereof, would be the common parent corporation of an
affiliated group of corporations within the meaning of Section 1504 of the
Internal Revenue Code of 1986, as amended (the 'Code'), which, together with any
other corporations which may become members of such affiliated group, is
referred to as the 'Blockbuster Consolidated Group'.

          C.  Viacom and Blockbuster desire to set forth in the Agreement their
agreement as to certain matters relating to the inclusion of the Blockbuster
Consolidated Group in the Viacom Consolidated Group, including the allocation of
tax liabilities for years in which the Blockbuster Consolidated Group is so
included, and certain other matters relating to taxes.

                                       1

 
          The parties agree as follows:

          1.  Filing of Consolidated Returns and Payment of Consolidated Tax
              --------------------------------------------------------------
Liability.
--------- 

          For all taxable years in which Viacom files consolidated federal
income tax returns (any such return of the Viacom Consolidated Group for any
taxable year, a 'Viacom Consolidated Return') and is entitled to include the
Blockbuster Consolidated Group in such returns under Sections 1501-1504, or
successor provisions, of the Code, Viacom shall include the Blockbuster
Consolidated Group in the consolidated federal income tax returns it files as
the common parent corporation of the Viacom Consolidated Group.  Viacom,
Blockbuster, and the other members of the Viacom Consolidated Group shall file
any and all consents, elections or other documents and take any other actions
necessary or appropriate to effect the filing of such federal income tax
returns.  For all taxable years in which the Blockbuster Consolidated Group is
included in the Viacom Consolidated Group, Viacom shall pay the entire federal
income tax liability of the Viacom Consolidated Group and shall indemnify and
hold harmless Blockbuster against any such liability; provided, however, that
                                                      --------  -------      
Blockbuster shall make payments to Viacom or receive payments from Viacom as
provided in the Agreement in settlement of the Blockbuster Consolidated Group's
share of the entire federal income tax liability of the Viacom Consolidated
Group for any taxable year (which term shall throughout the Agreement include
any short taxable year) beginning on or after the IPO Date during which the
Blockbuster Consolidated Group is included in the Viacom Consolidated Group (any
such taxable year, an 'Agreement Year' and any taxable year ending on or before
the IPO Date, a 'pre-Agreement Year').  For 

                                       2

 
purposes of this Agreement, the Blockbuster Consolidated Group shall be deemed
to have a taxable year beginning on January 1, 1999 and ending on the IPO Date
(which year shall be treated as a pre-Agreement Year), and the Blockbuster
Consolidated Group shall be deemed to have a taxable year beginning on the day
after the IPO Date and ending on December 31, 1999 (or, if earlier, the date on
which the Blockbuster Consolidated Group's actual taxable year beginning January
1, 1999 ends) which year shall be treated as an Agreement Year.

          2.  Pro Forma Blockbuster Return.
              ---------------------------- 

          For each Agreement Year, Viacom shall prepare a pro forma consolidated
federal income tax return for the Blockbuster Consolidated Group (a 'Pro Forma
Blockbuster Return').  Except as otherwise provided herein, the Pro Forma
Blockbuster Return for each Agreement Year shall be prepared as if Blockbuster
filed a consolidated return on behalf of the Blockbuster Consolidated Group for
such taxable year; provided, however, that the Pro Forma Blockbuster Return
shall not include any deduction or other tax benefit attributable to the
exercise of an option to purchase Viacom stock by an employee of Blockbuster (or
its affiliates).  The Pro Forma Blockbuster Return shall reflect any carryovers
of net operating losses, net capital losses, excess tax credits, or other tax
attributes from prior Agreement Years' Pro Forma Blockbuster Returns which could
have been utilized by the Blockbuster Consolidated Group (excluding those
attributes carried back pursuant to Section 5 herein) if the Blockbuster
Consolidated Group had never been included in the Viacom Consolidated Group and
all Pro Forma Blockbuster Returns had been actual returns, but otherwise shall
not reflect any tax benefits that arise from any adjustment to a pre-

                                       3

 
Agreement Year or carryovers of any other tax attributes from a pre-Agreement
Year, regardless of whether such attributes were utilized (on audit or
otherwise) on a tax return of Viacom in a pre-Agreement Year. The Pro Forma
Blockbuster Return shall be prepared in a manner that reflects all elections,
positions, and methods used in the Viacom Consolidated Return that must be
applied on a consolidated basis and otherwise shall be prepared in a manner
consistent with the Viacom Consolidated Return. The provisions of the Code that
require consolidated computations, such as Sections 861, 1201-1212, and 1231,
shall be applied separately to the Blockbuster Consolidated Group. Section
1.1502-13 of the Income Tax Regulations shall be applied as if the Blockbuster
Consolidated Group and the Viacom Consolidated Group (excluding the members of
the Blockbuster Group) were separate affiliated groups, except that the Pro
Forma Blockbuster Return shall also include any gains or losses of the members
of the Blockbuster Consolidated Group on transactions within the Blockbuster
Consolidated Group (including in years prior to the first Agreement Year) which
must be taken into account pursuant to Section 1.1502-13 of the Income Tax
Regulations and reflected on the Viacom Consolidated Return if the Blockbuster
Consolidated Group ceases to be included in the Viacom Consolidated Group. For
purposes of the Agreement, all determinations made as if the Blockbuster
Consolidated Group had never been included in the Viacom Consolidated Group and
as if all Pro Forma Blockbuster Returns were actual returns shall reflect any
actual short taxable years resulting from the Blockbuster Consolidated Group
joining or leaving the Viacom Consolidated Group.

                                       4

 
          3.  Pro Forma Blockbuster Return Payments.
              ------------------------------------- 

          For each Agreement Year, Blockbuster shall make periodic payments
('Periodic Payments') to Viacom in such amounts as determined by Viacom based
upon the estimated tax payments that would be due from the Blockbuster
Consolidated Group if it were not included in the Viacom Consolidated Group no
later than the dates on which payments of estimated tax would be due from the
Blockbuster Consolidated Group if it were not included in the Viacom
Consolidated Group.  The balance of the tax due for an Agreement Year shall be
paid to Viacom no later than March 15 of the following year (the 'Balance
Payment').  Blockbuster shall pay to Viacom no later than the date on which a
Viacom Consolidated Return for any Agreement Year is filed an amount equal to
the sum of (i) the federal income tax liability shown on the corresponding Pro
Forma Blockbuster Return prepared for the Agreement Year and (ii) the additions
to tax, if any, under Section 6655 of the Code that would have been imposed on
Blockbuster (treating the amount due to Viacom under (i) above as its federal
income tax liability and treating any periodic payments to Viacom pursuant to
the first sentence of this Section 3 as estimated payments under Section 6655 of
the Code) and which result from the inaccuracy of any information provided by
Blockbuster to Viacom pursuant to Section 5 hereof or from the failure of
Blockbuster to provide any requested information, reduced by (iii) the sum of
the amount of the Periodic Payments and the Balance Payment (collectively, the
'Total Periodic Payments'), plus (iv) any interest and additions to tax (other
than under Section 6655 of the Code) that would be due under the Code if the
Total Periodic Payments were actual payments of tax.  If Blockbuster's Total
Periodic Payments to Viacom for any Agreement Year exceed the 

                                       5

 
amount of its liability under the preceding sentence, Viacom shall refund such
excess to Blockbuster within 30 days after filing the Viacom Consolidated
Return. For purposes of the Agreement, the term 'federal income tax liability'
includes the tax imposed by Sections 11, 55 and 59A of the Code, or any
successor provisions to such Sections. Viacom shall notify Blockbuster of any
amounts due from Blockbuster to Viacom pursuant to this Section 3 no later than
5 business days prior to the date such payments are due and such payments shall
not be considered due until the later of the due date described above or the
fifth day from the notice from Viacom.

          4.  Payments for Taxable Years in the Event of Deconsolidation.
              ---------------------------------------------------------- 
          (a) Payments by Blockbuster to Viacom.  If for any taxable year after
              ---------------------------------                                
the Blockbuster Consolidated Group ceases to be included in the Viacom
Consolidated Group (a 'Post-Consolidation Year'), (i) the federal income tax
liability of the Blockbuster Consolidated Group is less than (ii) the federal
income tax liability that would have been imposed with respect to the same
period if the Blockbuster Consolidated Group had not been included in the Viacom
Consolidated Group for any Agreement Year, all Pro Forma Blockbuster Returns had
been actual returns for such years, and no carryovers of Blockbuster attributes
from pre-Agreement years were permitted, then Blockbuster shall pay to Viacom
the excess of (ii) over (i) within 10 days of the filing of the Blockbuster
Post-Consolidation Year return.
          (b) Payments by Viacom to Blockbuster.  If for any Post-Consolidation
              ---------------------------------                                
Year (i) the federal income tax liability of the Blockbuster Consolidated Group
is greater than (ii) the federal income tax liability that would have been
imposed with respect to the same period if the Blockbuster Consolidated Group
had not been included in the 

                                       6

 
Viacom Consolidated Group for any Agreement Year, all Pro Forma Blockbuster
Returns had been actual returns for such years, and no carryovers of Blockbuster
attributes from pre-Agreement Years were permitted, then Viacom shall pay to
Blockbuster the excess of (i) over (ii) within 10 days of notification by
Blockbuster to Viacom of the filing of the Blockbuster Post-Consolidation Year
return.

          (c) Documentation.  Prior to the payment of any amounts due pursuant
              -------------                                                   
to this Section 4, the parties shall exchange such information and documentation
as is reasonably satisfactory to each of them in order to substantiate the
amounts due pursuant to this Section 4.  Any disputes as to such amounts and
documentation which cannot be resolved prior to the date a payment is due shall
be referred to an independent accounting firm whose fees shall paid one half by
Blockbuster and one half by Viacom.

          (d) No Post-Consolidation Year Carrybacks.  If a Blockbuster federal
              -------------------------------------                           
income tax return with respect to a Post-Consolidation Year reflects a net
operating loss, net capital loss, excess tax credits, or any other tax
attribute, such attribute may not be carried back to a Viacom tax return.

          5.  Carrybacks.
              ---------- 

          If a Pro Forma Blockbuster Return reflects a net operating loss, net
capital loss, excess tax credit or other tax attribute (a 'Pro Forma Blockbuster
Attribute'), which  is actually utilized in a Viacom Consolidated Return
(including any amendments thereto), then, within 30 days after the later of (i)
the due date for the Viacom Consolidated Return (taking into account any
extensions thereof) or (ii) the date such Pro Forma Blockbuster Attribute is
actually realized in cash (whether directly or by 

                                       7

 
offset), Viacom shall pay to Blockbuster an amount equal to the lesser of (x)
the refund which the Blockbuster Consolidated Group would have received as a
result of the carryback of such Pro Forma Blockbuster Attribute to a Pro Forma
Blockbuster Return for any prior Agreement Year or Years (determined as if the
first Agreement Year were the earliest taxable year to which such attributes
could be carried back) or (y) the tax savings or tax benefit realized by Viacom
with respect to the use of such Pro Forma Blockbuster Attribute in a Viacom
Consolidated Return. All calculations of deemed refunds pursuant to this Section
5 shall include interest computed as if Blockbuster had filed a claim for refund
or an application for a tentative carryback adjustment pursuant to Section
6411(a) of the Code on the date on which the Viacom Consolidated Return is
filed.

          6.  Preparation of Tax Package and Other Financial Reporting
              --------------------------------------------------------
Information.
----------- 

          Blockbuster shall provide to Viacom in a format determined by Viacom
all information requested by Viacom as necessary to prepare the Viacom
Consolidated Return and the Pro Forma Blockbuster Return (the 'Viacom Tax
Package').  The Viacom Tax Package with respect to any taxable year shall be
provided to Viacom on a basis consistent with current practices of the Viacom
Consolidated Group no later than April 1 of the following year.  Blockbuster
shall also provide to Viacom information required to determine the Total
Periodic Payments, current federal taxable income, current and deferred tax
liabilities, tax reserve items, and any additional current or prior information
required by Viacom on a timely basis consistent with current practices of the
Viacom Consolidated Group.

                                       8

 
          7.  Returns, Audits, Refunds, Amended Returns, Litigation, Adjustments
              ------------------------------------------------------------------
and Rulings.
----------- 

          (a) Returns.  Viacom shall have exclusive and sole responsibility for
              -------                                                          
the preparation and filing of the Viacom Consolidated Returns (including
requests for extensions thereof) and any other returns, amended returns and
other documents or statements required to be filed with the Internal Revenue
Service (the 'IRS') in connection with the determination of the federal income
tax liability of the Viacom Consolidated Group.

          (b) Audits; Refund Claims.  Viacom will have exclusive and sole
              ---------------------                                      
responsibility and control with respect to the conduct of IRS examinations of
the returns filed by the Viacom Consolidated Group and any refund claims with
respect thereto.  Blockbuster shall assist and cooperate with Viacom during the
course of any such proceeding.  Viacom shall give Blockbuster notice of and
consult with Blockbuster with respect to any issues relating to items of income,
gain, loss, deduction or credit of any member of the Blockbuster Consolidated
Group (any such items, 'Blockbuster Consolidated Return Items').  Viacom shall
not settle or otherwise compromise any Blockbuster Consolidated Return Item that
would result in additional liability for Blockbuster under this Agreement
without the written consent of Blockbuster, which consent shall not be
unreasonably withheld.  If Blockbuster does not respond to Viacom's request for
consent within 30 days, Blockbuster shall be deemed to have consented.
Notwithstanding the foregoing, Viacom shall have the right in its sole
discretion to pay any disputed taxes and sue for a refund in the forum of its
choice.  In the case of any audit or litigation with respect to a Blockbuster
return for a Post-

                                       9

 
Consolidation Year, Blockbuster shall not settle or otherwise compromise any
matter relating to the treatment of any item arising in an Agreement Year or a
pre-Agreement Year in a manner which would affect the liability of Viacom to
Blockbuster or Blockbuster to Viacom pursuant to Section 4 without the consent
of Viacom, which consent shall not be unreasonably withheld.

          (c) Litigation.  If the federal income tax liability of the Viacom
              ----------                                                    
Consolidated Group becomes the subject of litigation in any court, the conduct
of the litigation shall be controlled exclusively by Viacom.  Blockbuster shall
assist and cooperate with Viacom during the course of litigation, and Viacom
shall consult with Blockbuster regarding any issues relating to Blockbuster
Consolidated Return Items.

          (d) Expenses.  Blockbuster shall reimburse Viacom for all reasonable
              --------                                                        
out-of-pocket expenses (including, without limitation, legal, consulting and
accounting fees) in the course of proceedings (i) described in paragraphs (b)
and (c) of this Section to the extent such expenses are reasonably attributable
to Blockbuster Consolidated Return Items for any Agreement Year or (ii) relating
to any assertion of liability attributable in whole or in part to actions or
events covered by Section 11.

          (e) Recalculation of Payments to Reflect Adjustments.  To the extent
              ------------------------------------------------                
that any audit, litigation or claim for refund with respect to a Viacom
Consolidated Return or a Blockbuster return for a Post-Consolidation Year
results in an additional payment of tax (including a payment of tax made
preliminary to commencing a refund claim or litigation) or a refund of tax (any
such additional payment or refund, an 'Adjustment') relating to the treatment of
a Blockbuster Consolidated Return Item for an 

                                       10

 
Agreement Year, a corresponding adjustment shall be made to the corresponding
Pro Forma Blockbuster Return.

          All calculations of payments made pursuant to Sections 3, 4, and 5 of
the Agreement shall be recomputed to reflect the effect of any Adjustments on
the relevant Pro Forma Blockbuster Return or on the liability of the Blockbuster
Consolidated Group for a Post-Consolidation Year.  Within 5 days after any such
Adjustment, Blockbuster or Viacom, as appropriate, shall make additional
payments or refund payments to the other party reflecting such Adjustment, plus
interest pursuant to Section 8 of the Agreement calculated as if payments by and
to Blockbuster pursuant to Sections 3, 4, and 5 of the Agreement and this
Section 7 were payments and refunds of federal income taxes.  Blockbuster shall
further pay to Viacom the amount of any penalties or additions to tax incurred
by the Viacom Consolidated Group as a result of an adjustment to any Blockbuster
Consolidated Return Item for an Agreement Year.

          (f) Rulings.  Blockbuster shall assist and cooperate with Viacom and
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take all actions requested by Viacom in connection with any ruling requests
submitted by Viacom to the IRS, including rulings unrelated to the Distributions
(defined in Section 11(a) below).

          (g) Applicability with Respect to All Consolidated Returns.  The
              ------------------------------------------------------      
provisions of Section 7(a), (b) and (c) above shall apply to Viacom Consolidated
Returns and Blockbuster Consolidated Return Items for all taxable years in which
the Blockbuster Consolidated Group (or any member thereof) is includable in the
Viacom Consolidated Group.

                                       11

 
          (h) Document Retention, Access to Records & Use of Personnel.  Until
              --------------------------------------------------------        
the expiration of the relevant statute of limitations (including extensions),
Blockbuster shall (i) retain records, documents, accounting data, computer data
and other information (collectively, the 'Records') necessary for the
preparation, filing, review, audit or defense of all tax returns relevant to an
obligation, right or liability of either party under the Agreement; and (ii)
give Viacom reasonable access to such Records and to its personnel (insuring
their cooperation) and premises to the extent relevant to an obligation, right
or liability of either party under the Agreement.  Prior to disposing of any
such Records, Blockbuster shall notify Viacom in writing of such intention and
afford Viacom the opportunity to take possession or make copies of such Records
at its discretion.

          8.  Interest.
              -------- 

          Interest required to be paid by or to Blockbuster pursuant to the
Agreement shall, unless otherwise specified, be computed at the rate and in the
manner provided in the Code for interest on underpayments and overpayments,
respectively, of federal income tax for the relevant period.  Any payments
required pursuant to the Agreement which are not made within the time period
specified in the Agreement shall bear interest at a rate equal to two hundred
basis points above the average interest rate on the senior bank debt of
Blockbuster.

          9.  Foreign, State and Local Income Taxes.
              ------------------------------------- 

          In the case of foreign, state or local taxes based on or measured by
the net income of the Viacom Consolidated Group, or any combination of members
thereof (other than solely with respect to members which are members of the
Blockbuster 

                                       12

 
Consolidated Group or which are members of the Viacom Consolidated Group but not
the Blockbuster Consolidated Group) on a combined, consolidated or unitary
basis, the provisions of the Agreement shall apply with equal force to such
foreign, state or local tax for each Agreement Year whether or not the
Blockbuster Consolidated Group is included in the Viacom Consolidated Group for
federal income tax purposes; provided however, that interest pursuant to the
                             -------- -------
first sentence of Section 8 of the Agreement shall be computed at the rate and
in the manner provided under such foreign, state or local law for interest on
underpayments and overpayments of such tax for the relevant period and
references to provisions of the Code throughout the Agreement shall be deemed to
be references to analogous provisions of state, local, and foreign law.

          For any Agreement Year or pre-Agreement Year, Viacom shall have the
sole and exclusive control of (a) the determination of whether a combined,
consolidated or unitary tax return should be filed for any foreign, state or
local tax purpose and (b) all foreign, state or local income tax audits and
litigation with respect to any member of the Blockbuster Consolidated Group.
Blockbuster shall reimburse Viacom for all reasonable out-of-pocket expenses
(including, without limitation, legal, consulting and accounting fees) in the
course of proceedings described in the preceding sentence to the extent such
expenses are reasonably attributable to Blockbuster or any member of the
Blockbuster Consolidated Group.

                                       13

 
          Blockbuster shall provide to Viacom separate legal entity reporting
information with respect to any member of the Blockbuster Consolidated Group as
requested by Viacom on a timely basis.

          Viacom will provide notice of and consult with Blockbuster with
respect to any issue relating to such audits and litigation and Blockbuster will
provide to Viacom any information necessary to conduct such audits and
litigation.  Viacom shall not settle or otherwise compromise any audits or
litigation that would result in additional liability for Blockbuster under this
Section 9 without the written consent of Blockbuster, which consent shall not be
unreasonably withheld.  If Blockbuster does not respond to Viacom's request for
consent within 30 days, Blockbuster shall be deemed to have consented.
Notwithstanding the foregoing, Viacom shall have the right in its sole
discretion to have Blockbuster pay any disputed taxes and sue for a refund in
the forum of Viacom's choice.

          Blockbuster shall be responsible for filing tax returns relating to
payroll, sales and use, property, withholding and similar taxes and shall be
responsible for the payment of such taxes.

          For all taxable years prior to and including the taxable years that
Blockbuster is a member of the Viacom Consolidated Group, Blockbuster shall have
the sole and exclusive responsibility for all taxes based on or measured by the
net income which are determined solely by the income of the Blockbuster
Consolidated Group (or any combination of the members thereof including the
predecessors of such members) on a combined, consolidated, unitary or separate
company basis.  Viacom, in consultation with the Chief Financial Officer of
Blockbuster, shall have sole and 

                                       14

 
exclusive responsibility for the preparation of returns relating to such taxes
and the control of audits, controversies and proceedings with respect thereto.

          Notwithstanding the immediately preceding paragraph, in the case of
New York State and New York City taxes based on or measured by the net income
which are determined solely by the income of the Blockbuster Consolidated Group
(or any combination of the members thereof including the predecessors of such
members) on a combined, consolidated, unitary or separate company basis, Viacom
shall have the sole and exclusive responsibility for such taxes and for the
return preparation and the control of audits, controversies and proceedings with
respect thereto.

          10.  UK Tax Surrenders.
               ----------------- 

          If requested to do so by Viacom UK Limited ('VUKL'), Blockbuster
agrees that it will cause any of its direct or indirect subsidiaries which,
under the tax laws of the United Kingdom, are or have been regarded as resident
in the United Kingdom to consent under provisions of Chapter IV of Part X of TA
1988 to the surrender of all or any part of their available tax losses to VUKL
or to any member of the United Kingdom tax group of which VUKL is the principal
member.  This agreement is made in respect of all accounting periods ended on or
before December 31, 1998, and Blockbuster agrees to take or cause to be taken
all actions necessary to effect the loss surrender.

          11.  Taxes Attributable to the Distributions.
               --------------------------------------- 

          (a) Actions Inconsistent with the Rulings.  In the event that stock of
              -------------------------------------                             
Blockbuster (or any successor thereto) is ultimately distributed to any or all
of Viacom's shareholders pursuant to transactions intended to qualify under
Section 355 of the Code, including a distribution of Blockbuster stock from
Viacom International Inc. to 

                                       15

 
Viacom, (any such transaction, a 'Distribution' and collectively, the
'Distributions'), Blockbuster shall not take or fail to take, and shall not
permit any other member of the Blockbuster Consolidated Group or any other
corporation or other entity that is directly or indirectly more than 50 percent
(by vote or value) owned by any member of the Blockbuster Consolidated Group
(any such entity, a 'Blockbuster Affiliate' and together with the Blockbuster
Consolidated Group, the 'Blockbuster Entities') to take or fail to take, any
action if such act or failure to act would be inconsistent with any ruling,
including for all purposes of the Agreement any supplemental rulings,
(collectively, the 'Rulings') issued by the IRS in connection with the
Distributions or any representation, covenant or information included in any
submission to the IRS in connection with the Rulings (together with the Rulings,
the 'Rulings and Submissions').

          (b) Liability.  Notwithstanding anything to the contrary in the
              ---------                                                  
Agreement, Blockbuster and the Blockbuster Entities shall be jointly and
severally liable for, and shall indemnify and hold harmless Viacom and each
member of the Viacom Consolidated Group (other than members of the Blockbuster
Consolidated Group) from and against, on an after-tax basis, any and all taxes
(including interest, penalties and additions to tax) resulting from the
Distributions to the extent such taxes result from (i) any event or transaction
after the Distributions that involves the stock, assets, or business of the
Blockbuster Entities, whether or not such event or transaction is the result of
direct actions of, or within the control of, the Blockbuster Entities, (ii) any
act or failure to act on the part of any of the Blockbuster Entities after the
Distributions, (iii) the breach of any representation, covenant or information
regarding the Blockbuster Entities included in the Rulings and Submissions, or
(iv) any actions contemplated by 

                                       16

 
Section 11(c) below, regardless of whether such actions are permitted pursuant
to Section 11(d) below.

          (c) Covenants.  Blockbuster agrees that during the two years following
              ---------                                                         
the Distributions, Blockbuster will not, and will not permit any of the
Blockbuster Entities to:

          (i)    sell, exchange, distribute or otherwise transfer all or a
     substantial portion of its assets or any stock or equity interest in any of
     the Blockbuster Entities,

          (ii)   enter into any merger or liquidation transaction,

          (iii)  discontinue or otherwise fail to maintain the active trade or
     business relied upon in connection with the Rulings and Submissions,

          (iv)   purchase any of its outstanding stock other than through stock
     purchases meeting the requirements of section 4.05(1)(b) of Rev. Proc. 96-
     30,

          (v)    issue any stock or equity interests (except pursuant to the
     exercise of employee stock options),

          (vi)   enter into any agreement for the sale or other disposition of
     its stock or equity interests,

          (vii)  amend its certificate of incorporation (or other organizational
     documents), whether through a stockholder vote or otherwise, in a manner
     that affects the relative voting rights of the separate classes of
     Blockbuster stock (including, without limitation, through the conversion of
     one class of Blockbuster stock into another class of Blockbuster stock), or

                                       17

 
          (viii) take any action inconsistent with the information,
     representations or covenants included in the Rulings and Submissions or
     that would result in the Distributions being taxable in whole or in part to
     the Viacom Consolidated Group or Viacom's shareholders.

          (d) Exceptions to Covenants.  Notwithstanding Section 11(c) above, the
              -----------------------                                           
Blockbuster Entities may take actions inconsistent with the covenants contained
in such Section 11(c), if Viacom consents in writing to such actions, such
consent to be determined by Viacom in its sole discretion taking into account
solely the preservation of the tax-free status of the Distributions; provided,
however, that if such consent is not given, Blockbuster may request, which
request may not be unreasonably denied, that Viacom either:

          (i)  seek to obtain a ruling from the IRS that the actions in question
     (the 'Restricted Actions') will not result in the Distributions being
     taxable to the Viacom Consolidated Group or Viacom's shareholders (an
     'Additional Ruling'); provided, however, that Viacom shall not be obligated
     to request such a ruling if it determines in good faith that such request
     might have an adverse effect on the Viacom Consolidated Group or Viacom's
     shareholders; or
          (ii) seek  an unqualified opinion of counsel from counsel chosen by
     Viacom that the Restricted Actions will not result in the Distributions
     being taxable to the Viacom Consolidated Group or Viacom's shareholders (an
     'Unqualified Opinion').

If either an Additional Ruling or Unqualified Opinion is obtained in form and
substance acceptable to Viacom, the Blockbuster Entities may engage in such
Restricted Actions.  

                                       18

 
Blockbuster agrees that Viacom is to have no liability for any tax resulting
from any Restricted Actions permitted pursuant to this Section 11(d) and agrees
to indemnify and hold harmless Viacom against any such tax. Blockbuster shall
also bear all costs incurred by Viacom in connection with considering whether to
grant a request pursuant to this Section 11(d) or in requesting and/or obtaining
any Additional Ruling or Unqualified Opinion.

          (e) Rulings and Additional Rulings.  In its sole discretion and
              ------------------------------                             
control, Viacom shall have the right to obtain the Rulings and, if any, the
Additional Rulings.  Blockbuster shall cooperate with Viacom and take all
actions requested by Viacom in connection with obtaining the Rulings and
Additional Rulings (including, without limitation, by making any representation
or covenant or providing any materials or information requested by Viacom or the
IRS; provided that Blockbuster shall not be required to make any representation
or covenant that is inconsistent with historical facts or as to future matters
or events over which it has no control).

          12.  Deductions Attributable to Options.
               ---------------------------------- 

          Viacom shall determine whether Viacom or Blockbuster shall file tax
returns claiming the deductions attributable to the exercise of (i) options to
purchase stock of Viacom which are held by employees of Blockbuster (or its
affiliates) after the Distributions or by employees of both Viacom (or its
affiliates) and Blockbuster (or its affiliates) after the Distributions and/or
(ii) options to purchase stock of Blockbuster which were issued as a result of a
conversion of Viacom options and which resulted in a charge to the earnings of
Viacom at the time of such conversion for financial reporting purposes.  If it
is determined that Viacom shall claim all such tax deductions, Viacom 

                                       19

 
shall be entitled to any such tax deductions and the tax returns of Viacom and
Blockbuster shall be prepared accordingly and Viacom shall be responsible for
the remittance of the employer's share of FICA and similar taxes. To the extent
any such deductions are disallowed because a tax authority determines that
Blockbuster should have claimed such deductions, Blockbuster shall take all
actions necessary to claim such deductions and pay to Viacom an amount equal to
the tax benefit of such deductions. If it is determined that Blockbuster shall
claim all such tax deductions, Blockbuster shall be entitled to any such tax
deductions and the tax returns of Viacom and Blockbuster shall be prepared
accordingly. Blockbuster shall notify Viacom of the amount of tax deductions it
intends to claim with respect to the exercise of Viacom options and shall pay
Viacom an amount equal to the actual benefit of the related deductions (less any
FICA or similar taxes paid by Blockbuster) not later than 3 days prior to the
due date of the estimated tax payment immediately following when any member of
the Blockbuster Consolidated Group becomes entitled to any tax savings, refund,
credit or other offset attributable to such deduction. To the extent any such
deductions are disallowed because a tax authority determines that Viacom should
have claimed such deductions, Viacom shall pay to Blockbuster an amount equal to
the actual benefit received by Viacom as a result of the disallowance to the
extent Blockbuster has paid Viacom pursuant to the preceding sentence. For
purposes of the preceding sentence, such benefit shall be considered equal to
the excess of the amount of tax that would have been payable to a tax authority
(or of the refund that would have been receivable) by Viacom.

                                       20

 
          13.  Confidentiality.
               --------------- 

          Each of Viacom and Blockbuster agrees that any information furnished
pursuant to the Agreement is confidential and, except as and to the extent
required by law or otherwise during the course of an audit or litigation or
other administrative or legal proceeding, shall not be disclosed to other
persons.  In addition, each of Viacom and Blockbuster shall cause its employees,
agents and advisors to comply with the terms of this Section 13.

          14.  Successors and Access to Information.
               ------------------------------------ 

          The Agreement shall be binding upon and inure to the benefit of any
successor to any of the parties, by merger, acquisition of assets or otherwise,
to the same extent as if the successor had been an original party to the
Agreement.  If for any taxable year the Blockbuster Consolidated Group is no
longer included in the Viacom Consolidated Group, Viacom and Blockbuster agree
to provide to the other party any information reasonably required to complete
tax returns for taxable periods beginning after the Blockbuster Consolidated
Group is no longer included in a Viacom Consolidated Return, and each of Viacom
and Blockbuster will cooperate with respect to any audits or litigation relating
to any Viacom Consolidated Return.

          15.  Governing Law.
               ------------- 

          The Agreement shall be governed by and construed in accordance with
the laws of New York excluding (to the greatest extent permissible by law) any
rule of law that would cause the application of the laws of any jurisdiction
other than the State of New York.

          16.  Headings.
               -------- 

                                       21

 
          The headings in the Agreement are for convenience only and shall not
be deemed for any purpose to constitute a part or to affect the interpretation
of the Agreement.

          17.  Counterparts.
               ------------ 

          The Agreement may be executed simultaneously in two or more
counterparts, each of which will be deemed an original, and it shall not be
necessary in making proof of the Agreement to produce or account for more than
one counterpart.

          18.  Severability.
               ------------ 

          If any provision of the Agreement is held to be unenforceable for any
reason, it shall be adjusted rather than voided, if possible, in order to
achieve the intent of the parties to the maximum extent practicable.  In any
event, all other provisions of the Agreement shall be deemed valid, binding, and
enforceable to their full extent.

          19.  Termination.
               ----------- 

          The Agreement shall remain in force and be binding so long as the
applicable period of assessments (including extensions) remains unexpired for
any taxes contemplated by the Agreement; provided, however, that neither Viacom
                                         --------  -------                     
nor Blockbuster shall have any liability to the other party with respect to tax
liabilities for taxable years in which the Blockbuster Consolidated Group is not
included in the Viacom Consolidated Returns except as provided in Sections 4,
11, and 12 of  this Agreement.

          20.  Successor Provisions.
               -------------------- 
          Any reference herein to any provisions of the Code or Treasury
Regulations shall be deemed to include any amendments or successor provisions

                                       22

 
thereto as appropriate.

          21.  Compliance by Subsidiaries.
               -------------------------- 

          Viacom and Blockbuster each agree to cause all members of the Viacom
Consolidated Group and Blockbuster Consolidated Group (including predecessors
and successors to such members) to comply with the terms of the Agreement.

          IN WITNESS WHEREOF, each of the parties of the Agreement has caused
the Agreement to be executed by its duly authorized officer on this date of
August 16, 1999.
                              Viacom Inc.


                              By: /s/ Michael D. Fricklas 
                                 -----------------------------
                                  Name:   Michael D. Fricklas
                                  Title:  Sr. Vice President,
                                          General Counsel and
                                          Secretary

                              Blockbuster Inc.

                              By: /s/ Edward B. Stead
                                 -----------------------------
                                 Name:   Edward B. Stead
                                 Title:  Executive Vice President
                                         General Counsel and
                                         Secretary

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