Jon Pertwee
The Doctor
Acting
Katy Manning
Jo Grant
Acting
Nicholas Courtney
Brigadier Lethbridge-Stewart
Acting
Richard Franklin
Captain Mike Yates
Acting
John Levene
Sergeant Benton
Acting
Roger Delgado
The Master
Acting
Michael Wisher
Rex Farrel
Acting
Harry Towb
McDermott
Acting
David Garth
Time Lord
Acting
Frank Mills
Radio Telescope Director
Acting
Christopher Burgess
Professor Philips
Acting
Andrew Staines
Goodge
Acting
John Baskcomb
Rossini
Acting
Dave Carter
Museum Attendant
Acting
Stephen Jack
Farrell Senior
Acting
Barbara Leake
Mrs. Farrell
Acting
Roy Stewart
Strong Man
Acting
Dermot Tuohy
Brownrose
Acting
Norman Stanley
Telephone Mechanic
Acting
Terry Walsh
Auton Policeman
Acting
Pat Gorman
Auton Leader
Acting
Hayden Jones
Auton (voice)
Acting
Tommy Reynolds
Troll Doll (uncredited)
Acting