You may be looking for the philosopher.

Alan Watts was a human who was part of the geological team in the Arctic until he was turned into a Cyberslave by a Cybermat.

When the Eleventh Doctor and Amy opened the door to the base, Alan was waiting there, having already been turned into a Cyberslave. He chased the Doctor around whilst Amy thought of a plan to stop him. She vented out hot steam, killing him. The Doctor took his swipe card to further continue into the base. (GAME: Blood of the Cybermen)

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