gallery
CAST
Regular Cast
Tom Baker (Doctor Who), Louise Jameson (Leela)
Guest Cast
John Leeson (K9), Michael Sheard (Lowe), Brian Grellis (Safran) [1-2, 4], Edmund Pegge (Meeker) [1], Jay Neill (Silvey) [1], Anthony Rowlands (Crewman) [1], John Leeson (Nucleus Voice)*, Frederick Jaeger (Professor Marius) [2-4], Roy Herrick (Parsons) [2-3], Elizabeth Norman (Marius’ Nurse) [2-3], Nell Curran (Receptedition Nurse) [2], Jim McManus (Opthalmologist) [2-4], Roderick Smith (Cruikshank) [2-3], Kenneth Waller (Hedges) [2], Pat Gorman (A Medic) [3-4]&dagger,, John Scott Martin (Nucleus) [3-4].
CREW
Written by | Bob Baker And Dave Martin |
Directed by | Derrick Goodwin |
Produced by | Graham Williams |
sypnosis
A three-man rocket crew are nearly done with their mission to Titan Base until a course change puts the rocket in the path of a strange cloud in space. By the time they arrive, they have come under the control of a sentient virus which threatens the galaxy. When the TARDIS picks up an emergency message, it flies into the cloud, infecting The Doctor. To save himself and others, he must undertake a dangerous journey.