Tom Baker
The Doctor
Elisabeth Sladen
Sarah Jane Smith
Kenneth Gilbert
Richard Dunbar
Michael Barrington
Sir Colin Thackeray
Sylvia Coleridge
Amelia Ducat
John Challis
Scorby
Mark Jones
Arnold Keeler/Krynoid Voice
Seymour Green
Hargreaves
Hubert Rees
John Stevensen
John Gleeson
Charles Winlett
Ian Fairbairn
Doctor Chester
John Acheson
Major Beresford
Ray Barron
Sergeant Henderson
Alan Chuntz
Chauffeur
David Masterman
Guard Leader
Harry Fielder
Guard