Train guard (Revolutions of Terror)

The train guard was working the 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 chasing 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, onto the platform, and up the stairs towards the exit of the 45th Street subway station, until Gabby showed him his own reflection in the mirror. After that the Cerebravore left him lying unconscious but breathing on the floor. (COMIC: Revolutions of Terror)

Behind the scenes

 * In the real world, there is no such thing as a "train guard" for the New York subway system. As the train was still in motion, indicating the driver was off doing his job, this would seem to indicate this character was in fact the train conductor.
 * The train guard possessed by a Cerebravore was featured in the second of the three issues of the comic story alongside the Doctor and Gabby in the gallery of three main characters of the story.