Jon Pertwee
The Doctor
Acting
Caroline John
Liz Shaw
Acting
Nicholas Courtney
Brigadier Lethbridge-Stewart
Acting
Ronald Allen
Ralph Cornish
Acting
John Abineri
Carrington
Acting
Robert Cawdron
Taltalian
Acting
Michael Wisher
John Wakefield
Acting
Cheryl Molineaux
Miss Rutherford
Acting
Ray Armstrong
Grey
Acting
Robert Robertson
Collinson
Acting
Ric Felgate
Van Lyden / Alien Ambassador
Acting
Dallas Cavell
Quinlan
Acting
Bernard Martin
Control Room Assistant
Acting
John Moreno
Dobson
Acting
James Haswell
Corporal Champion
Acting
Derek Ware
UNIT Sergeant
Acting
William Dysart
Reegan
Acting
Cyril Shaps
Lennox
Acting
Gordon Sterne
Heldorf
Acting
Steve Peters
Alien Ambassador / Lefee
Acting
Neville Simons
Alien Ambassador / Michaels
Acting
Max Faulkner
UNIT Soldier
Acting
John Lord
Masters
Acting
Tony Harwood
Flynn
Acting
John Levene
Sergeant Benton
Acting
James Clayton
Private Parker
Acting
Joanna Ross
Control Room Assistant
Acting
Carl Conway
Control Room Assistant
Acting
Roy Scammell
Technician
Acting
Peter Noel Cook
Alien Space Captain
Acting
Peter Halliday
Aliens' Voices
Acting
Geoffrey Beevers
Private Johnson
Acting