Roche (The Suns of Caresh)

 was an Arcalian. After being hit by a bus, he regenerated into a body identical to the Doctor's third incarnation in an attempt to evade the Furies hunting him. He could swap mindscents with humans, effectively adopting their appearances for a short time, during which period they resembled him. Roche's TARDIS disguised itself as a shower cubicle and an ice cream van before he disposed of it as part of a plan to trap the Furies that were hunting him. The Doctor was later able to avert the events that prompted the Furies' masters to send them after Roche, restoring his TARDIS and allowing him to leave Earth. (PROSE: The Suns of Caresh)