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
Actors:
David Brierly, David Daker, Geoff Hinsliff, Geoffrey Bateman, Stephen Jenn, Tom Baker, Lalla Ward, Barry Andrews, Jennifer Lonsdale, Lewis Fiander, Maggie Petersen, Peter Craze, Richard Barnes