Document:

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                                                                  Exhibit 10.20

                                    AGREEMENT AND RELEASE

                                                               December 13, 2000

TO:   Leonard R. Byrne

FROM: William V. Hickey

This memorandum sets forth our agreement related to your leaving employment with
Sealed Air Corporation and its subsidiary, Cryovac Inc. (collectively "Sealed
Air").

1.       EMPLOYMENT

         We confirm that your last date of active employment will be June 30,
         2001. Your salary will continue until that date and your active Sealed
         Air employee benefit coverages will also continue until that date
         (provided you continue to pay any required premiums). Also, certain
         benefit coverages will continue during the period that you are
         receiving severance payments (see Section 3). If you have any questions
         regarding Sealed Air employee benefits, please refer to the appropriate
         Summary Plan Descriptions or call Don Watt at Sealed Air's Park 80
         Office in Saddle Brook, New Jersey.

         You have advised that you will resign as an officer of Sealed Air
         Corporation (and from all positions you hold as officer or director of
         any of Sealed Air Corporation's subsidiaries) as of December 31, 2000,
         and that you do not wish to be considered a candidate for appointment
         to any of these positions at any time thereafter, even though you will
         continue to serve as an employee until June 30, 2001.

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                                      -2-

2.       UNUSED VACATION PAYMENT

         You will receive a lump sum payment for any accrued 2001 vacation time
         remaining unused as of your last date of active employment in
         accordance with Sealed Air's vacation policy. Since you were hired
         prior to January 1, 1983, you will also be paid the additional vacation
         committed at the time of accrual conversion, if not already paid or
         used. This payment for unused vacation will be made in the month
         following your last day of active employment and will be subject to
         legally required and authorized deductions.

3.       SEVERANCE BENEFITS

         a.)      You will receive one and one-half weeks pay for each year
                  of service plus an additional 13 weeks for a total of 65 weeks
                  of severance pay. You will receive severance pay at your
                  current base pay level of $23,750.00 per month (subject to
                  legally required and authorized deductions) during the period
                  commencing immediately after your last date of active
                  employment and ending on September 27, 2002. Payments will be
                  made on regularly scheduled payroll dates.

         b.)      During the period that you are receiving severance pay,
                  you will continue to be eligible to participate in Sealed
                  Air's Medical and Dental coverages, provided you continue to
                  make any required contributions and the plans continue to be
                  available to employees.

          c.)     The period that you receive severance payments hereunder
                  will be considered service and active employment under the W.
                  R. Grace & Co. Stock Incentive Plans, subject to the approval
                  of such approach by the Organization and Compensation
                  Committee (the "Compensation Committee") of the Board of
                  Directors of Sealed Air Corporation. The period that you
                  receive severance benefits hereunder will also be considered
                  continued employment for the purpose of payment of your
                  deferred compensation account under the Compensation Deferral
                  Agreement entered into as of September 20, 2000 between you
                  and Sealed Air Corporation.

                  The provisions of this Paragraph (c) will put you in the same
                  position as an active employee who retires on the date your
                  severance payments ends with regard to the specific plan
                  provisions mentioned in this Paragraph (c).

                  You agree that you will be solely responsible for any
                  federal, state or local income taxes or property taxes that
                  accrue as a result of the above.

4.        CONTINUATION OF MEDICAL AND DENTAL COVERAGE AFTER SEVERANCE PERIOD
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                                      -3-

          At the time you are to receive your last severance payment, you will
          be notified of your right to elect coverage under the Sealed Air
          Medical and Dental Plans by paying the full cost of such coverage
          (which is sometimes called "COBRA Coverage") for a period of up to
          eighteen months after your severance payments cease. We understand
          that you have the right to start coverage under the W. R. Grace & Co.
          retiree medical plan whenever you elect such coverage to start. If W.
          R. Grace & Co. retiree medical plan should cease to be available to
          you (except if you cancel such coverage or stop paying for such
          coverage), then you may enroll in Sealed Air's Retiree Medical Plan as
          then in effect. Your cost for such retiree medical coverage in Sealed
          Air's Retiree Medical Plan will be the full cost of such benefits
          rather than the special transitional rate provision that applies to
          certain Cryovac employees whose combination of age and service on
          March 31, 1998 totaled 70 and more, except that if Sealed Air offers
          eligibility at the special transitional rate provision to those
          Cryovac employees who met such age and service criterion but are
          eligible to participate in the retiree medical plan provided by W. R.
          Grace & Co., then you will also be offered such special transitional
          rate provision.

5.        OTHER BENEFIT PLANS

          Your participation in all employee benefit plans and programs other
          than those specifically referred to in this Agreement after you are no
          longer actively employed shall be governed by the terms of each of
          those plans and programs. As noted above, if you have any questions
          regarding Sealed Air employee benefits, please refer to the
          appropriate Summary Plan Descriptions or call Don Watt at Sealed Air's
          Park 80 Office in Saddle Brook, New Jersey.

          You will not be eligible for a 2001 contribution to the Profit Sharing
          Plan since you will not be actively employed (as provided in that
          Plan) on December 31, 2001.

          Subject to the provisions of Section 3(c) above, your Deferred
          Compensation Accounts will be paid to you in accordance with your
          original elections.

6.        BONUSES

          Your 2000 bonus will be based on the attainment of the goals
          established by the Compensation Committee in February 2000 under
          Sealed Air's Performance-Based Compensation Program. Assuming those
          goals are attained, your 2000 bonus will also be based on your
          individual performance and the performance of Sealed Air and the
          Cryovac Division during the year 2000. Your 2001 bonus will be
          pro-rated based on the months of your active employment during 2001.
          Your 2001 bonus objectives will be based on the corporate and business
          unit performance for the entire bonus period, as well as your
          individual performance during the portion of the year during which you
          are actively employed. Your 2001 bonus payment will be made at the
          same time as such payments are made to active employees. You will not
          be eligible for a bonus for 2002.
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                                      -4-

7.        CONTINGENT STOCK AWARD

          On April 2, 1998, you were awarded the right to purchase 11,500 shares
          of Sealed Air Common Stock under the Contingent Stock Plan of Sealed
          Air Corporation. As provided in such Plan, such shares were issued
          subject to Sealed Air's right to re-acquire such shares if your
          employment ended prior to June 1, 2001. Since your last date of active
          employment will be June 30, 2001, Sealed Air's right to repurchase
          such shares of Common Stock will expire during your active employment
          under the terms of the original award.

          In addition, on April 22, 1999, you were awarded the right to purchase
          13,500 shares of Sealed Air Common Stock under the Contingent Stock
          Plan of Sealed Air Corporation. As provided for in such Plan, such
          shares were issued subject to Sealed Air's right to re-acquire such
          shares if your employment ended prior to April 22, 2002. The period
          ending on April 22, 2002 is referred to in this letter as the
          "Repurchase Period". Subject to the approval of the Compensation
          Committee, Sealed Air will forego its right to repurchase such shares
          of Common Stock upon termination of your employment on the terms and
          conditions set forth below.

          The 13,500 shares referred to in the preceding paragraph (the
          "Retained Shares") will remain subject to Sealed Air's option to
          repurchase such shares at your purchase price of $1.00 per share
          through the Repurchase Period. Such option will become exercisable
          only if you breach any of your obligations referred to in Sections 8
          or 11 during the Repurchase Period. You agree that Sealed Air shall
          also be entitled to enforce any other rights or remedies available to
          it upon such breach. You agree that you will not sell, transfer or
          encumber the Retained Shares during the Repurchase Period. You also
          agree that Sealed Air may place a legend on the certificate
          representing the Retained Shares indicating (1) that during the
          Repurchase Period the retained shares cannot be sold, transferred or
          encumbered, and (2) that Sealed Air has the right to repurchase the
          Retained Shares in the event of your breach of such obligations during
          the Repurchase Period. Upon any of the changes in the Common Stock
          described in Section 15 of the Contingent Stock Plan, the restriction,
          option and legend described in this paragraph shall apply to any
          securities issued in connection with any such change in respect to the
          Retained Shares. Following expiration of the Repurchase Period, if you
          comply with such obligations, you may surrender to Sealed Air the
          certificate representing the Retained Shares in exchange for a new
          certificate free of the legend or for a statement from Sealed Air
          representing the Retained Shares in book entry form free of such
          legend.

8.        OBLIGATIONS UNDER THE "1969 AGREEMENT" AND STATE LAW

          Because of your significant management role in Cryovac's business for
          a number of years and your position since March 31, 1998 as one of
          Sealed Air Corporation's executive officers, you hold significant
          confidential proprietary information of Sealed Air such as information
          about the finances, business plans and programs, research and
          development
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                                      -5-

          projects, products, manufacturing processes, raw materials, suppliers,
          customers, marketing and sales of Sealed Air Corporation and Cryovac,
          Inc., and their respective subsidiaries, and the predecessor companies
          of such companies. You acknowledge and agree that disclosure to or use
          by anyone other than Sealed Air of such information could cause
          substantial damage to Sealed Air. You also understand and agree that
          after you cease to be employed by Sealed Air, you remain subject to
          the obligations under the agreement that you signed on July 28, 1969,
          with W. R. Grace & Co., a Connecticut corporation (the "1969
          Agreement"), except as amended under Section 11 below and except that
          Sealed Air Corporation shall be considered the Company under the 1969
          Agreement. You also understand that this memo and the 1969 Agreement
          will not affect your obligations under the South Carolina Uniform
          Trade Secrets Law or any other applicable obligations that may limit
          your disclosure or use of Sealed Air's confidential information.

9.        RESPONSIBILITIES DURING TRANSITION PERIOD

          During a suitable transition period, which shall end no later than the
          completion of the severance period, you agree to make yourself
          available for reasonable amounts of time to support the smooth
          transition of the management of the Cryovac business. Also, through
          the completion of your current term as President of the FPA, you will
          continue to represent Sealed Air in various industry groups and
          activities, including FPA, AMI, National Chicken Council, FPM & SA,
          and Clemson University. During this period, Sealed Air will reimburse
          you for reasonable and customary travel and entertainment expenses
          incurred in such representation consistent with Sealed Air's employee
          travel and entertainment expense policy.

10.       CONSULTING SERVICES

          At the completion of the severance period on September 27, 2002,
          Sealed Air may be interested in continuing to utilize your knowledge
          and expertise in the business and industry for some period thereafter.
          At that time, Sealed Air may retain your services as a consultant for
          a period of up to one year at a rate and on terms to be mutually
          agreed upon. Neither you nor Sealed Air shall have any obligation to
          enter into such a consulting arrangement, however.

11.       NON-COMPETITION AGREEMENT

          As part of this agreement, and in consideration for the severance
          payments to be received, you agree that, except with Sealed Air
          Corporation's consent, you will not engage, assist, or have any active
          interest in any business (directly or indirectly, individually or in
          combination with another or others, or as principal, partner, agent,
          contractor, consultant, employee, officer or shareholder of a
          corporation or otherwise) which is engaged in manufacturing, producing
          and/or selling any product or products that competes with any product
          manufactured or sold by Sealed Air Corporation or any of its
          subsidiaries in the

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                                      -6-

          fields of food packaging or industrial protective packaging through
          the end of the severance period, as well as during any additional
          period for which you may be retained as a consultant, and for two
          years thereafter. This provision shall not prohibit you from being a
          shareholder who owns less than five percent of a publicly-traded
          company. We agree that this non-competition agreement will replace the
          non-competition provision (Section 4(b)) of the 1969 Agreement. Sealed
          Air Corporation will give its consent in all cases where it has
          received assurances satisfactory to it that its interests will be
          properly safeguarded.

12.       COMPANY CAR

          You will be entitled to retain your company car during the period of
          your active employment. You may purchase your company car when you
          leave active employment under the terms available to employees who
          leave employment in good standing. If you do not choose to purchase
          your company car, you can agree to make arrangements to return the car
          to Sealed Air no later than July 14, 2001, at the Duncan, South
          Carolina location.

13.       ENTIRE AGREEMENT AND GOVERNING LAW

          This letter and the 1969 Agreement, as amended by this agreement, set
          forth the entire agreement between you and Sealed Air concerning the
          subject matter as discussed herein. This agreement and release shall
          be governed by the laws of the state of South Carolina, without
          reference to principles of conflicts of law, regardless of the
          jurisdiction in which any action or proceeding may be instituted.

14.       GENERAL RELEASE

          In consideration for your signing this agreement, you acknowledge and
          agree that Sealed Air will provide you with severance payments and
          benefits to which you would not otherwise be entitled. You hereby
          knowingly and voluntarily release and forever discharge the Sealed Air
          Group from all claims that you may have. The Sealed Air Group includes
          Sealed Air Corporation, Cryovac, Inc., Sealed Air Corporation (US),
          and any and all of their past, present and future affiliates and
          subsidiaries. The Sealed Air Group also includes all those entities'
          past, present and future employees, officers, directors,
          representatives, benefit plans, benefit plan fiduciaries and their
          respective successors and assigns, whether acting in their individual
          capacities or on behalf of the previously mentioned entities. You
          release the Sealed Air Group from any and all claims, demands, causes
          of action and liabilities of any kind. Included in this release are
          claims that are known or unknown, fixed or contingent, that you may
          have or claim to have, now or later, in any and all jurisdictions,
          whether domestic or international, including those related in any way
          to your employment or your separation from employment with the Sealed
          Air Group. This release includes, but is not limited to, any claims
          arising under any federal, state or local law prohibiting employment
          discrimination based on race,
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                                      -7-

          color, national origin, sex, age, religion, disability or veteran
          status. The statutory claims being released include, but are not
          limited to, claims under Title VII of the Civil Rights Act of 1964,
          the Civil Rights Act of 1866, the Civil Rights Act of 1991, the
          Federal Rehabilitation Act, the Americans with Disabilities Act, the
          Age Discrimination in Employment Act, the Older Workers Benefit
          Protection Act, the Employee Retirement Income Security Act and the
          South Carolina Human Affairs Law. You agree not to file a lawsuit or
          initiate any other action against the Sealed Air Group to assert any
          such claims. However, this release does not release your right to
          enforce the terms of this Agreement.

          Sealed Air releases and forever discharges you from any and all
          claims, demands, causes of action and liabilities of any kind which it
          may have through the date of the execution of this Agreement,
          including but not limited to claims that are known or unknown, fixed
          or contingent, that Sealed Air may have or claim to have, in any and
          all jurisdictions whether domestic or international. However, Sealed
          Air does not release or discharge its rights to enforce this
          Agreement, the 1969 Agreement (as amended by this Agreement), the
          South Carolina Uniform Trade Secrets Law or any other applicable
          obligations that may limit your disclosure or use of Sealed Air's
          confidential information.

15.       ACKNOWLEDGEMENT

          By signing this agreement and release, you acknowledge that:

          A. You have carefully read this agreement and release and the 1969
          Agreement.

          B. You have had at least 21 days to consider signing this agreement
          and release.

          C. You have been advised to consult with a lawyer of your choice
          before signing this agreement and release, and you have had a
          reasonable period of time to do so.

          D. You are making a voluntary, informed decision in signing this
          agreement and release free of duress and coercion, and you realize
          that you are forever surrendering important rights in signing this
          agreement and release.

          E. You understand that this agreement and release will not become
          effective until the eighth day following the date on which you sign
          it. Until the close of business on the seventh day after you sign it
          you may revoke this agreement and release by delivering written
          notification of revocation to William V. Hickey, Sealed Air
          Corporation, Park 80 East, Saddle Brook, New Jersey 07663. Sealed Air
          must receive your written revocation by that date and time. You
          understand that if you revoke this agreement and release, you will not
          receive any of the severance pay or benefits described in Section 3.

                                           SEALED AIR CORPORATION

                                           By: /s/ William V. Hickey
                                              ----------------------------------
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                                      -8-

                                           President and Chief Executive Officer

I HAVE READ THIS AGREEMENT AND RELEASE, I UNDERSTAND IT, AND I AGREE TO BE BOUND
BY ITS TERMS AND CONDITIONS.

By: /s/ Leonard R. Byrne
    -----------------------
    Leonard R. Byrne

Date: 12/24/00
     ----------------------<PAGE>

TERMINATION AGREEMENT

     Termination Agreement effective as of December 20, 2000 (this "Agreement")
by and between Knowledge TV, LLC, a Colorado limited liability company (the
"LLC"), and Jones International Networks, Ltd., a Colorado corporation, acting
directly and on behalf of certain of its wholly-owned subsidiaries referred to
below ("JIN").

     WHEREAS, the LLC (as successor of Knowledge TV, Inc. ("KTV")) and JIN, or
one of its subsidiaries, are parties to three separate agreements, each of which
are attached hereto as EXHIBITS A-1, A-2 AND A-3 (collectively, the "KTV
Agreements") referred to as: (i) Services Agreement dated June 10, 1998 between
KTV and Jones Earth Segment, Inc.; (ii) Uplink Services Agreement dated June 10,
1998 between KTV and Jones Earth Segment, Inc.; and (iii) Transponder License
Agreement dated June 10, 1998 between KTV and Jones Space Holdings, Inc.

     WHEREAS, the LLC, as successor to KTV, (under KTV's former name "Mind
Extension University, Inc.") is a party to an Uplink Services Agreement dated
January 1, 1995, which is attached hereto as EXHIBIT B (the "1995 Agreement"),
with an affiliate of JIN and with certain other parties, including Jones
Computer Network, Ltd. ("JCN").

     WHEREAS, the LLC, as successor of KTV, is obligated under the KTV
Agreements and the 1995 Agreement (as to KTV only but not as to JCN) to pay fees
through the year 2004 an aggregate amount over time of $2,245,363 (the "Fees").

WHEREAS, the parties hereto desire to terminate the KTV Agreements and to
terminate the LLC's obligations under the 1995 Agreement as to KTV (but not as
to JCN), and to have the Fees paid by means of a one time payoff to JIN in the
aggregate amount of $1,941,314 (the "Termination ").

WHEREAS, for purposes of the uplink rates charged to JCN after the date of this
Agreement under the 1995 Agreement, the KTV feed shall continue to be treated as
a separate network through December 31, 2004.

     NOW, THEREFORE, in consideration of the mutual agreements and covenants
contained herein, the parties hereto agree as follows:

1.   TERMINATION. In consideration of the transactions contemplated by the
Termination, at the Closing (as defined below), the LLC shall wire transfer
$1,941,314 to an account specified by JIN; and the LLC and JIN hereby agree that
each of the three KTV Agreements and the LLC's obligations under the
<PAGE>

1995 Agreement (as to KTV but not as to JCN) shall automatically, and without
any further action by either the LLC or JIN, be cancelled and terminated and of
no further force or effect.

2.   RELEASES. As of the Closing, the parties hereto, for themselves and their
respective subsidiaries, hereby forever release and discharge the other party
from any and all liability, claims, demands, actions, or causes of action of any
kind or character, whether fixed or contingent, known or unknown, arising or
relating to the KTV Agreements and the 1995 Agreement as to KTV (but not as to
JCN).

3.   CLOSING. This Agreement shall be effective immediately upon its execution
(the "Closing").

4.   THE 1995 AGREEMENT. For purposes of the uplink rates charged to JCN under
the 1995 Agreement after the date of this Agreement, the KTV feed shall continue
to be treated as a separate network through December 31, 2004.

5.   COUNTERPARTS. This Agreement may be executed in one or more counterparts,
each of which shall constitute an original but all of which, when taken
together, shall constitute but one and the same instrument.

6.   GOVERNING LAW; SEVERABILITY. The parties agree that this Agreement has been
executed and delivered in the State of Colorado and shall be construed, enforced
and governed by the laws thereof, without giving effect to the principles of
conflicts of law of such State. Should any clause, section or part of this
Agreement be held or declared to be void or illegal for any reason, all other
clauses, sections or parts of this Agreement shall nevertheless continue in full
force and effect.

     IN WITNESS WHEREOF, the undersigned have caused this Agreement to be duly
executed and delivered as of the date written above.

                                        KNOWLEDGE TV, LLC

                                        By:  Jones International, Ltd.,
                                             the sole Member

                                        By: /s/ Glenn R. Jones
                                            -----------------------------
                                            Glenn R. Jones
                                            President

                                        JONES INTERNATIONAL NETWORKS, LTD.

                                        By: /s/ Jeffrey C. Wayne
                                            -----------------------------
                                            Jeffrey C. Wayne
                                            President

                                       2

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