S23, E11: On board the space-liner Hyperion III, a murderer is at work. The Doctor and Melanie intend to discover the culprit, but who is the mutant locked in the isolation room?
Starring Michael Jayston, Honor Blackman, Michael Craig
S23, E11: On board the space-liner Hyperion III, a murderer is at work. The Doctor and Melanie intend to discover the culprit, but who is the mutant locked in the isolation room?