出演者一覧（22名）
Jon Pertwee
The Doctor
Katy Manning
Jo Grant
Nicholas Courtney
Brigadier Lethbridge-Stewart
John Levene
Sergeant Benton
Richard Franklin
Captain Mike Yates
Stewart Bevan
Cliff Jones
Jerome Willis
Stevens
Tony Adams
Elgin
Ben Howard
Hinks
?
Mostyn Evans
Dai Evans
?
Talfryn Thomas
Dave
?
Roy Evans
Bert
?
Mitzi McKenzie
Nancy
?
Ray Handy
Milkman
?
John Scott Martin
Hughes
?
John Rolfe
Fell
?
John Dearth
BOSS (voice)
?
Richard Beale
Minister of Ecology
?
Jean Burgess
Cleaner
?
Brian Justice
Yates' Guard
Terry Walsh
Guard
Roy Skelton
James