Sontaran Field Major Styre is conducting experiments on the survivors of future Earth in preparation of a full-scale Sontaran invasion of the planet. Can the Doctor defeat Styre and save the world?
Tom Baker
The Doctor
Elisabeth Sladen
Sarah Jane Smith
Ian Marter
Harry Sullivan
Kevin Lindsay
Styre / The Marshal
Donald Douglas
Vural
Glyn Jones
Krans
Peter Walshe
Erak
Peter Rutherford
Roth
Terry Walsh
Zake
Brian Ellis
Prisoner
