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?
Director:
Writer:
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
