Document:

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                                                                  Exhibit 10.9

                                 March 11, 1998

Mr. William J. Bell
Cablevision Systems Corporation
One Media Crossways
Woodbury, NY 11797

Dear Bill:

      This letter will confirm the terms of your employment by Cablevision
Systems Corporation (the "Company") as Vice Chairman for the three-year period
ending December 31, 2000.

      Your annual salary will be $700,000, with such increases as the
Compensation Committee of the Board of Directors shall determine from time to
time.

      Your annual bonus will be payable each year at the discretion of the
Compensation Committee.

      You will continue to participate in all employee benefits at the level
available to senior management of the Company.

      The Company depends upon your flexibility to take on additional roles and
responsibilities, from time to time, whether permanent or temporary. At the same
time, there are certain key roles and responsibilities that will not be changed
without your consent. If you leave the Company involuntarily (other than for
"cause" (as hereinafter defined)), following a change of control of the Company,
or because, without your consent, (i) your compensation or title is reduced,
(ii) you are no longer a member of the Board of Directors or the CEO Group,
(iii) you are no longer the chief financial officer of the Company, or (iv) you
no longer report directly to the Chairman of the Board of Directors or the Chief
Executive Officer of the Company, you will receive the following:

1)    a severance payment at the discretion of the Compensation Committee, but
      in no event less than the salary due for the remainder of the term of this
      Agreement or one year's annual salary (or three times the sum of your
      annual salary plus your prior year's annual bonus in the event of a change
      of control (as defined in Appendix 1 of your Nonqualified Stock Option
      Agreement dated April 17, 1997)), whichever is greater;

2)    an annual bonus of no less than 100% of your annual salary, pro rated for
      the months worked during such year;

3)    payment by the Company of the annual premiums on your life insurance
      policies with Mass Mutual and New York Life for three years;

<PAGE>

4)    the right to receive payment of all outstanding bonus share and deferred
      compensation awards, and to exercise all stock option and conjunctive
      rights awards for the remainder of the term of this Agreement or a period
      of 180 days, if greater, whether or not such awards shall be due or
      exercisable at the time;

5)    the right to receive payment of all outstanding long-term performance
      awards, at such time, if any, as such awards shall be earned (as if you
      remained in the continuous employ of the Company through the payment
      date); and

6)    the right to participate in the Company's supplemental health benefit
      plan.

      Termination for "cause" means termination for (i) gross negligence in a
manner materially detrimental to the Company or an affiliate of the Company or
willful misfeasance in a matter of material importance to the Company or an
affiliate of the Company, or (ii) your conviction of a felony involving moral
turpitude.

      If you cease to be an employee of the Company as a result of your death or
physical or mental disability, you (or your estate or beneficiary) will receive
payment of all your outstanding bonus share and deferred compensation awards;
the right to receive payment of all outstanding long-term performance awards, at
such time, if any, as such awards shall be earned (as if you remained in the
continuous employ of the Company through the payment date); and the right to
exercise all your stock option and conjunctive rights awards for the remainder
of the term of this Agreement or for a period of one year, if greater, whether
or not such awards shall be due and exercisable at the time.

      Your employment term will be extended for an additional one-year period on
January 1, 1999, 2000 and 2001, unless the Company or you gives the other notice
of election not to extend by the preceding October 31.

                                   Sincerely,

                                   CABLEVISION SYSTEMS CORPORATION

                                   By:  /s/ James L. Dolan
                                   -----------------------------
                                             James L. Dolan
                                             Chief Executive Officer

Accepted and Agreed:

By:  /s/ William J. Bell
-----------------------------
        William J. Bell<PAGE>

                                                                 Exhibit 10.10

                                 March 11, 1998

Mr. Robert S. Lemle
Cablevision Systems Corporation
One Media Crossways
Woodbury, NY 11797

Dear Robert:

      This letter will confirm the terms of your employment by Cablevision
Systems Corporation (the "Company") as Executive Vice President and General
Counsel for the three-year period ending December 31, 2000.

      Your annual salary will be $525,000, with such increases as the
Compensation Committee of the Board of Directors shall determine from time to
time.

      Your annual bonus will be payable each year at the discretion of the
Compensation Committee.

      You will continue to participate in all employee benefits at the level
available to senior management of the Company.

      The Company depends upon your flexibility to take on additional roles and
responsibilities, from time to time, whether permanent or temporary. At the same
time, there are certain key roles and responsibilities that will not be changed
without your consent. If you leave the Company involuntarily (other than for
"cause" (as hereinafter defined)), following a change of control of the Company,
or because, without your consent, (i) your compensation or title is reduced,
(ii) you are no longer a member of the Board of Directors or the CEO Group,
(iii) you are no longer the chief legal officer of the Company, or (iv) you no
longer report directly to the Chairman of the Board of Directors or the Chief
Executive Officer of the Company, you will receive the following:

1)    a severance payment at the discretion of the Compensation Committee, but
      in no event less than the salary due for the remainder of the term of this
      Agreement or one year's annual salary (or three times the sum of your
      annual salary plus your prior year's annual bonus in the event of a change
      of control (as defined in Appendix 1 of your Nonqualified Stock Option
      Agreement dated April 17, 1997)), whichever is greater;

2)    an annual bonus of no less than 65% of your annual salary, pro rated for
      the months worked during such year;

<PAGE>

3)    payment by the Company of the annual premiums on your life insurance
      policies with Mass Mutual and New York Life for three years;

4)    the right to receive payment of all outstanding bonus share and deferred
      compensation awards, and to exercise all stock option and conjunctive
      rights awards for the remainder of the term of this Agreement or a period
      of 180 days, if greater, whether or not such awards shall be due or
      exercisable at the time;

5)    the right to receive payment of all outstanding long-term performance
      awards, at such time, if any, as such awards shall be earned (as if you
      remained in the continuous employ of the Company through the payment
      date); and

6)    the right to participate in the Company's supplemental health benefit
      plan.

      Termination for "cause" means termination for (i) gross negligence in a
manner materially detrimental to the Company or an affiliate of the Company or
willful misfeasance in a matter of material importance to the Company or an
affiliate of the Company, or (ii) your conviction of a felony involving moral
turpitude.

      If you cease to be an employee of the Company as a result of your death or
physical or mental disability, you (or your estate or beneficiary) will receive
payment of all your outstanding bonus share and deferred compensation awards;
the right to receive payment of all outstanding long-term performance awards, at
such time, if any, as such awards shall be earned (as if you remained in the
continuous employ of the Company through the payment date); and the right to
exercise all your stock option and conjunctive rights awards for the remainder
of the term of this Agreement or for a period of one year, if greater, whether
or not such awards shall be due and exercisable at the time.

      Your employment term will be extended for an additional one-year period on
January 1, 1999, 2000 and 2001, unless the Company or you gives the other notice
of election not to extend by the preceding October 31.

                                   Sincerely,

                              CABLEVISION SYSTEMS CORPORATION

                              By:  /s/ James L. Dolan
                              -----------------------------
                                       James L. Dolan
                                       Chief Executive Officer

Accepted and Agreed:

By:  /s/ Robert S. Lemle
-----------------------------
         Robert S. Lemle<PAGE>

                                                             Exhibit 10.11

                                                    January 1, 1999

Mr. James L. Dolan
Cablevision Systems Corporation
1111 Stewart Avenue
Bethpage, NY 11714

Dear Jim:

     This letter will confirm the terms of your employment by Cablevision
Systems Corporation (the "Company") as President and Chief Executive Officer for
three -year period ending December 31, 2001.

     Your annual salary will be $950,000, with such increases as the
Compensation Committee of the Board of Directors shall determine time to time.

     Your annual bonus will be payable each year at the discretion of the
Compensation Committee.

     You will continue to participate in all employee benefits at the level
available to senior management of the Company.

     The Company depends upon your flexibility to take on additional roles and
responsibilities, from time to time, whether permanent or temporary. At the same
time, there are certain key roles and responsibilities that will not be changed
without your consent. If you leave the Company involuntarily (other than for
"cause" (as hereinafter defined)), following a change of control of the Company,
or because, without your consent, (i) your compensation or title is reduced,
(ii) you are no longer a member of the Board of Directors or the CEO Group,
(iii) you are no longer the chief executive officer of the Company, or (iv) you
no longer report directly to the Chairman of the Board of Directors of the
company, you will receive the following:

     1.   a severance payment at the discretion of the Compensation Committee,
          but in no event less than the salary due for the remainder of the term
          of this Agreement or one year's annual salary (or three times the sum
          of your annual salary plus your prior year's annual bonus in the event
          of a change of control (as defined in Appendix 1 of your Nonqualified
          Stock Option Agreement dated May 29, 1998)), whichever is greater.

     2.   an annual bonus of no less than 100% of your annual salary, pro rated
          for the months worked during such year;
<PAGE>

     3.   payment by the Company of the annual premiums on your life insurance
          policies with Mass Mutual and New York Life for three years;

     4.   the right to receive payment of all outstanding bonus share and
          deferred compensation awards, and to exercise all stock option and
          conjunctive rights awards for the remainder of the term of this
          Agreement or a period of 180 days, if greater, whether or not such
          awards shall be due or exercisable at the time;

     5.   the right to receive payment of all outstanding long-term performance
          awards, at such time, if any such awards shall be earned (as if you
          remained in the continuous employ of the Company through the payment
          date); and

     6.   the right to participate in the Company's supplemental health benefit
          plan.

          Termination for "cause" means termination for (i) gross negligence in
     a manner materially detrimental to the Company or an affiliate of the
     Company or willful misfeasance in a matter of material importance to the
     Company or an affiliate of the Company, or (ii) your conviction of a felony
     involving moral turpitude.

          If you cease to be an employee of the Company as a result of your
     death or physical or mental disability, you (or your estate beneficiary)
     will receive payment of all your outstanding deferred compensation awards;
     the right to receive payment of all outstanding long-term performance
     awards, at such time, if any, as such awards shall be earned (as if you
     remained in the continuous employ of the Company through the payment date);
     and the right to exercise all your stock option and conjunctive rights
     awards for the remainder of the term of this Agreement or for a period of
     one year, if greater, whether or not such awards shall be due and
     exercisable at the time.

          Your employment term will be extended for an additional one-year
     period on January 1, 2001 unless the Company or you gives the other notice
     of election not to extend by the proceeding October 31.

                                            Sincerely,

                                            CABLEVISION SYSTEMS CORPORATION

                                            By: /s/ Charles F. Dolan
                                                -----------------------------
                                                      Charles F. Dolan
                                                          Chairman

                                            Accepted and Agreed:

                                            /s/ James L. Dolan
                                            ---------------------------------
                                                      James L. Dolan

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