Exhibit 10.23 UnitedGlobalCom September 26, 2000 Bruce Mann 2/53 Portland Street Dover Heights, NSW Australia 2030 Dear Bruce: This letter sets forth the agreement ("Agreement"') among UnitedGlobalCom, Inc. ("United"), Austar United Communications Limited ("Company") and yourself concerning your continued employment with United and secondment to the Company in Australia. United may reassign you to a different affiliated company and/or location during the term of this Agreement. This Agreement supersedes and replaces the employment agreement between UnitedGlobalCom, Inc., CTV Pty Limited and STV Pty Limited, and you dated March 20, 1995 ("'l995 Agreement") and any and all other written or oral agreements between you, United and/or an affiliate of United and all such previous agreements are hereby rendered null and void. The terms of the Agreement are set forth below. 1. Effective Date: March 20, 2000 2. Title and Job Managing Director, Austar Entertainment Description: You will report to the CEO of Austar United Communications Your duties and responsibilities will be as assigned by your supervisor. 3. Term: The term of this Agreement will be for a period of three (3) years, commencing on the Effective Date and ending on March 20, 2003, subject to the terms and conditions of this Agreement. 4. Wages: You will be paid on a bi-weekly basis, at a rate equal to an annual salary of US$220,000, to commence on the Effective Date. This wage, together with the other benefits described below, represents your total compensation package. 5. Bonus: You will be eligible for an annual bonus of up to a maximum amount of fifteen percent (15%) of your base salary. Your eligibility for the bonus will be based on both the performance of the Company and your individual performance. The granting of the bonus is in the sole discretion of senior management. Employment Extension Bruce Mann September 26, 2000 6. Cost of Living You will be paid a cost of living differential, for housing Differential: and goods and services, in accordance with the policies of United and as may be recommended by a third party consultant used by United. Such payment will be made on the normal payroll dates. 7. Automobile: The Company will pay for an automobile and all automobile operating costs, to include gas, insurance and maintenance, as approved in advance by your supervisor. 8. Benefits: You will continue to be eligible for the standard benefit package offered by United, in accordance with the policy guidelines set forth by United and its insurance carriers. You will continue to be eligible to participate in United's 401(k) plan in accordance with the plan guidelines. 9. Tuition: You will be reimbursed for the cost of tuition fees and transportation for your children enrolled in grades kindergarten through 12 (or the equivalent) who reside with you in Australia as approved in advance by your supervisor. 10. Tax Your taxes will continue to be equalized in accordance with Equalization: the "Tax Equalization Policy" of United. In general terms, this means that the Company will bear the overall worldwide tax burden to the extent it exceeds your hypothetical tax liability (within some limitations) had you remained in the U.S. If it is determined by United and its independent tax consultants that under United's Tax Equalization Policy you owe taxes as a result of your assignment, you agree that you will pay such amount to United. If it is determined by United and its independent tax consultants that under United's Tax Equalization Policy, United owes you taxes as a result of your assignment in the foreign location, United agrees to pay you such amount. In the event you do not submit information necessary to complete your tax returns for a given tax year by the date required by United's tax consultant for timely filing or in the event you have not paid amounts owing to United under the Tax Equalization Policy for prior years, you will have no right to be tax equalized for that tax year for which a tax return is to be prepared and, in United's sole discretion, United may elect not to tax equalize you for such year. 11. Vacation: You will continue to receive twenty (20) days of vacation per anniversary year, which accrues on a monthly basis, taken in accordance with United's policy. Your original date of hire, March 20, 1995, will continue to be used as the anniversary date for calculating carry-over vacation. 2 Employment Extension Bruce Mann September 26, 2000 12. Home Leave: The Company agrees to pay for two business or four coach class tickets during each year of the Term, for you and each of your immediate family members residing in the foreign location for return to one destination in the U.S. These tickets cannot be used or exchanged for any other purpose. 13. Repatriation: Upon termination of your employment except for termination by United for cause as defined in Section 15, or unless you voluntarily resign prior to the end of the term, the Company will pay all repatriation costs in accordance with United's Expatriate Repatriation policy to one destination in the U.S. Such repatriation allowance is subject to approval by your supervisor. 14. Employee You understand that you may incur personal expenses in the Receivables: course of your employment with United. These expenses may include, but are not limited to, personal phone call charges, personal travel expenses, travel advances, and amounts due as a result of the tax equalization calculation. As a condition of your employment with United, you agree that United may deduct expenses you owe the Company or United from your paycheck at any time during your employment. You may be provided equipment to utilize during your employment with United. As a condition of your employment, you agree that upon separation from United, you will return such equipment. Any charges for damage done to any equipment will be deducted from your final paycheck. In the event any equipment is not returned, it will be given a fair market value which will be deducted from your final paycheck. Also, the Company may pursue other legal remedies available to recover the reasonable value of any items damaged or not returned. 15. Termination: Although it is not anticipated, your employment and this Agreement may be terminated before the end of its stated assignment length with or without cause. Cause for termination shall include but not be limited to violations of Company policy, unsatisfactory job performance, sexual harassment or other workplace misconduct, misuse of expense account, falsification of Company records, or similar offenses. Your employment and this Agreement may also be terminated without cause for any reason. In the case of a termination by the Company without cause, before the end of your assignment term, however, you will be entitled to a severance payment equal to twelve (12) months salary or salary through the end of the term of your assignment, whichever is less. As a condition of receiving the severance payment, however, you will be required to sign a legal release giving up your rights to sue United and the company to which you have been seconded for any reason related to your employment and separation from employment. 3 Employment Extension Bruce Mann September 26, 2000 16. United The Company may change, at its sole discretion, from time to Policies: time, the provisions of benefit plans, expatriate policies or other corporate policies. 17. Confidential You will not, during or after your employment, disclose or Information: use for the benefit of any person or entity other than United or the Company, any United or Company confidential information that you develop or receive during your employment. United and Company confidential information shall include all trade secrets, research and development information, product and marketing plans, personnel and financial data, product and service specifications, prototypes, software, models, customer lists and other confidential information or materials of United, Company, or of others with whom United or the Company has a confidential relationship. You will promptly return all such information and materials to United when your employment ends. 18. Severability In case any one or more of the provisions of this Agreement and Survival shall be found to be invalid, illegal or unenforceable in of Terms: any respect, the validity, legality and enforceability of the remaining provisions contained in this Agreement will not be affected. Further, any provision or portion of this Agreement found to be invalid, illegal, or unenforceable shall be deemed, without further action on the part of you or United, to be modified, amended and/or limited to the minimum extent necessary to render such provisions or portions thereof valid and enforceable. The provisions of this letter regarding trade secrets and confidential information shall survive the termination of your employment by United. 19. Entire This Agreement contains the parties' entire agreement with Agreement: respect to your expatriate assignment and supersedes any prior written or oral agreements the parties may have made. This Agreement may be amended only by a written document signed by you, United and the Company. 20. Governing Law: This Agreement and all aspects of your employment relationship with United are governed by the laws of the United States and the State of Colorado and all disputes concerning same will be resolved in Colorado. 4 Employment Extension Bruce Mann September 26, 2000 If the above employment terms are satisfactory, please indicate your acceptance of our offer by signing and returning three copies of this letter. UNITEDGLOBALCOM, INC. AUSTAR UNITED COMMUNICATIONS By /s/ Michael T. Fries By /s/ John C. Porter -------------------------------- ---------------------------------- Its Its Chief Executive Officer ------------------------------- --------------------------------- Date Date 10 October 2000 ------------------------------ --------------------------------- ACCEPTED and AGREED: /s/ Bruce Mann 10/10/2000 - ---------------------------------- ---------- Bruce Mann Date 5