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Exhibit 10.20
 Executive Employment Agreement
 Micromet, Inc.
 Dr. Carsten Reinhardt
Moltkestr. 9
80803 München
 Executive
 Whereas,
 Whereas,
 Now, therefore,
 1. Employment by Company
 1.1 Position.
 1.2 Duties and Location. Board Vorstand Vorstand
 1




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Vorstand
 1.3 Term. Initial Term Extension Term Employment Term
 1.4 Policies and Procedures.
 2. Compensation
 2.1 Base Salary.  Base Salary
 2.2 Bonus.
 2.3 Equity Compensation.
 2.4 Acceleration of Vesting.
 2




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Stock Award
 (a)
 (b)
 (c)
 (d) Change of Control
 (i) Exchange Act Voting Securities other than
 (1)
 (2)
 3




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(3)
 Provided, however, Securities Repurchase except that
 (ii)
 (iii) other
than:
 (1) Successor
Entity
 (2) provided, however
 2.5 Standard Company Benefits.
 4




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2.6 Business Expenses
 3. Insurance and Indemnification
 3.1 Disability and Life Insurance.
 (a)  
 (b)
 3.2 D&O Insurance.
 3.3 Indemnification.
 4. Vacation
  5. Outside Activities During Employment
 5.1 Exclusive Employment.
 5




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5.2 No Adverse Interests.
 5.3 Non-Competition during Employment Term. provided, however ,
 6. Proprietary Information Obligations
  7. Termination Of Employment
 7.1 Termination by Company for Cause.
 (a)
 (b) Cause provided, however ,
 6




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(c)
 7.2 Termination by Company without Cause.
 (a)
 (b) Severance
Benefits
 (i)
 (ii) Bonus
 7




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(iii)
 (iv) COBRA
 (v) 
 (c)
 (d)
 7.3 Termination by Executive for Good Reason.
 (a)
 (b) Good Reason
 8




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(c)
 7.4 Termination by Executive Without Good Reason.
 (a)
 (b)
 7.5 Termination for Death.
 (a) Death Benefits Recipients
 (i)
 (ii)
 9




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(iii)
 (b) provided
 (c)
 7.6 Termination for Permanent Disability.
 (a)
 (b)
 (c) Permanent Disability
 7.7 Cooperation Obligations.
 (a) Transition Activities.
 10




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(b) Return of Companys Property.
 (c) Litigation.
 (d) Expenses and Fees. th Fees
 7.8 Surviving Clauses.
 11




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8. Release
 Release
 9. Non-Competition
 9.1 Non-Compete Obligation. Non-Compete Period Non-Compete Field
 9.2 Non-Compete Payment. Non-Compete Payment
 9.3 Liquidated Damages.
 10. Non-Solicitation
 12
        11. General Provisions
 11.1 Notices.
 11.2 Confidentiality provided, however ,
 11.3 Reasonableness of Restrictions.
 11.4 Remedies.
 11.5 Severability.
 13




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11.6 Waiver.
 11.7 Complete Agreement; Amendment.
 11.8 Counterparts.
 11.9 Assignment; Assumption by Successor; Non-transferability of Interest.
 (a) provided, however
 (b)
 11.10 Headings.
 11.11 Construction.
 14




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11.12 Choice of Law; Jurisdiction.
 15




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In Witness Whereof,
 Micromet, Inc./s/ Christian ItinName: Christian Itin
Title:   President and CEO/s/ Carsten ReinhardtDr. Carsten Reinhardt
 16




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Exhibit A
 Proprietary Information And Inventions Agreement
 17




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Micromet, Inc.
 EMPLOYEE PROPRIETARY INFORMATION AND INVENTIONS AGREEMENT
 Micromet, Inc. Company Agreement
 1. Nondisclosure
 1.1 Recognition of Companys Rights; Nondisclosure.
 1.2 Proprietary Information. Proprietary Information Proprietary Information Inventions
 1.3 Third Party Information. Third Party Information
 1.4 Term of Nondisclosure Restrictions.
 A-1.




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1.5 No Improper Use of Information of Prior Employers and Others.
 2. Assignment of Inventions.
 2.1 Proprietary Rights. Proprietary Rights
 2.2 Assignment of Inventions. Company Inventions
 2.3 Unassigned or Nonassignable Inventions. Specific Inventions Law
 2.4 Obligation to Keep Company Informed.
 2.5 Government or Third Party.
 2.6 Works for Hire.
 2.7 Enforcement of Proprietary Rights.
 A-2.




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3. Records.
 4. Duty Of Loyalty During Employment.
 5. Reasonableness Of Restrictions.
 5.1
 5.2
 5.3
 6. No Conflicting Agreement or Obligation.
 7. Return of Company Property.
 A-3.




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8. Notices.
 9. Notification of New Employer.
 10. General Provisions
 10.1 Governing Law; Consent to Personal Jurisdiction.
 10.2 Severability.
 10.3 Successors and Assigns.
 10.4 Survival.
 10.5 Employment Status.
 10.6 Waiver.
 10.7 Advice of Counsel. I ACKNOWLEDGE THAT, IN EXECUTING THIS AGREEMENT, I HAVE HAD THE
OPPORTUNITY TO SEEK THE ADVICE OF INDEPENDENT LEGAL COUNSEL, AND I HAVE READ AND UNDERSTOOD ALL OF
THE TERMS AND PROVISIONS OF THIS AGREEMENT. THIS AGREEMENT WILL NOT BE CONSTRUED AGAINST ANY PARTY
BY REASON OF THE DRAFTING OR PREPARATION HEREOF.
 10.8 Entire Agreement.
 A-4.




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I have read this agreement carefully and understand its terms.
  /s/ Carsten Reinhardt(Signature)Dr. Carsten Reinhardt(Printed Name) Accepted and Agreed To:Micromet, inc.By:
    /s/ Christian ItinTitle: CEO A-5.




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Exhibit B
 RELEASE AGREEMENT
 1. Consideration.
 2. General Release. (a) (b) (c) (d) (e)
 3. ADEA Waiver.




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4. Section 1542 Waiver.
 A general release does not extend to claims which the creditor does not know or suspect to
exist in his favor at the time of executing the release, which if known by him must have
materially affected his settlement with the debtor.
  Agreed:Micromet, Inc.
    
    
    
    Carsten Reinhardt, an IndividualBy:[Name][Title]Date:
    
    
    
    Date:




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Exhibit C
 DEATH BENEFITS RECIPIENTS




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Table of Contents
 Page1.
    
    EMPLOYMENT BY COMPANY
    
    
    11.1 Position
    
    
    11.2 Duties and Location
    
    
    11.3 Term
    
    
    11.4 Policies and Procedures
    
    
    22.
    
    COMPENSATION
    
    
    22.1 Base Salary
    
    
    22.2 Bonus
    
    
    22.3 Equity Compensation
    
    
    22.4 Acceleration of Vesting
    
    
    22.5 Standard Company Benefits
    
    
    42.6 Business Expenses
    
    
    43.
    
    INSURANCE AND INDEMNIFICATION
    
    
    53.1 Disability and Life Insurance
    
    
    53.2 D&O Insurance
    
    
    53.3 Indemnification
    
    
    54.
    
    VACATION
    
    
    55.
    
    OUTSIDE ACTIVITIES DURING EMPLOYMENT
    
    
    55.1 Exclusive Employment
    
    
    55.2 No Adverse Interests
    
    
    55.3 Non-Competition during Employment Term
    
    
    66.
    
    PROPRIETARY INFORMATION OBLIGATIONS
    
    
    67.
    
    TERMINATION OF EMPLOYMENT
    
    
    67.1 Termination by Company for Cause
    
    
    67.2 Termination by Company without Cause
    
    
    77.3 Termination by Executive for Good Reason
    
    
    87.4 Termination by Executive Without Good Reason
    
    
    97.5 Termination for Death
    
    
    97.6 Termination for Permanent Disability
    
    
    107.7 Cooperation Obligations
    
    
    11
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Table
of Contents  (continued)
 Page7.8 Surviving Clauses
    
    
    128.
    
    RELEASE
    
    
    129.
    
    NON-COMPETITION
    
    
    129.1 Non-Compete Obligation
    
    
    129.2 Non-Compete Payment
    
    
    129.3 Liquidated Damages
    
    
    1210.
    
    NON-SOLICITATION
    
    
    1211.
    
    GENERAL PROVISIONS
    
    
    1311.1 Notices
    
    
    1311.2 Confidentiality
    
    
    1311.3 Reasonableness of Restrictions
    
    
    1311.4 Remedies
    
    
    1311.5 Severability
    
    
    1311.6 Waiver
    
    
    1411.7 Complete Agreement; Amendment
    
    
    1411.8 Counterparts
    
    
    1411.9 Assignment; Assumption by Successor; Non-transferability of Interest
    
    
    1411.10 Headings
    
    
    1411.11 Construction
    
    
    1511.12 Choice of Law; Jurisdiction.
    
    
    15
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