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