Doctor Who: Nightmare Of Eden
Two spacecraft fuse in a hyperspace collision. Fortunately the Doctor, Romana and K-9 arrive to help. But when a crewmember is found clawed by a ferocious animal, it seems there's something even more frightening stalking the corridors.
The answers lie with zoologist Professor Tryst, his CET protection machine, and a planet called Eden - the home of the ferocious Mandrels.