The Doctor
Jo Grant
Brigadier Lethbridge-Stewart
Captain Mike Yates
Sergeant Benton
The Master
Rex Farrel
McDermott
Time Lord
Radio Telescope Director
Professor Philips
Goodge
Rossini
Museum Attendant
Farrell Senior
Mrs. Farrell
Strong Man
Brownrose
Telephone Mechanic
Auton Policeman
Auton Leader
Auton (voice)
Troll Doll (uncredited)