Dr. Christensen is introduced to Thomas as the lead physician of WICKED by Assistant Director Janson, also known as Rat Man, when Thomas returns to the WICKED headquarters to help the Right Arm by planting a device in the headquarters that will render the organization's weapons completely useless. He takes part in the discussion with Janson, Dr. Wright and Thomas about what Thomas will have to do as Final Candidate. He is described as a bald, angular and skinny man, wearing green scrubs with a thin and reedy voice. He handled the preparations for Thomas' surgery.

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