Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Katy ManningJo Grant
Roger DelgadoThe Master
Nicholas CourtneyThe Brigadier
Richard FranklinCaptain Mike Yates
John LeveneSgt. Benton
Michael WisherRex Farrel
Harry TowbMcDermott
★
Christopher BurgessProfessor Philips
★
John BaskcombRossini
★
Stephen JackFarrell Senior
★
Roy StewartStrong Man
★
Barbara LeakeMrs. Farrel
Terry WalshAuton Policeman (uncredited)