An alien distress call draws the Doctor and Peri to Earth, 1985, where they uncover a Cyberman plot to change the course of history.
Colin Baker
The Doctor
Nicola Bryant
Peri Brown
Maurice Colbourne
Lytton
Brian Glover
Griffiths
Terry Molloy
Russell
James Beckett
Payne
David Banks
Cyber Leader
Michael Kilgarriff
Cyber Controller
