演职人员
The Doctor
Jon Pertwee
Jo Grant
Katy Manning
Brigadier Lethbridge-Stewart
Nicholas Courtney
Sergeant Benton
John Levene
Captain Mike Yates
Richard Franklin
Cliff Jones
Stewart Bevan
Stevens
Jerome Willis
Elgin
Tony Adams
Hinks
Ben Howard
Dai Evans
Mostyn Evans
Dave
Talfryn Thomas
Bert
Roy Evans
Nancy
Mitzi McKenzie
Milkman
Ray Handy
Hughes
John Scott Martin
Fell
John Rolfe
BOSS (voice)
John Dearth
Minister of Ecology
Richard Beale
Cleaner
Jean Burgess
Yates' Guard
Brian Justice
Guard
Terry Walsh
James
Roy Skelton