Train guard (Revolutions of Terror)

The subway conductor was working a midnight shift on the 3 train that Gabby Gonzalez took returning from her accountancy class on the night of 30 October.

Overtaken by a Cerebravore, he started making ominous announcements and chase passengers along the train. Gabby first saw him in the shape of a hairy monster, but he promptly changed into a horror version of Gabby herself. Controlled by the Cerebravore, he continued chasing her and the Tenth Doctor, who happened to be in the same car, out of the subway car and onto the platform, until Gabby showed him his own reflection in the mirror. After that the Cerebravore left him lying unconscious on the platform. (COMIC: Revolutions of Terror)