Ηθοποιοί επεισοδίου
Jon PertweeThe Doctor
Katy ManningJo Grant
Roger DelgadoThe Master
Nicholas CourtneyThe Brigadier
Richard FranklinCaptain Mike Yates
John LeveneSgt. Benton
Damaris HaymanMiss Hawthorne
Don McKillopBert the Landlord
★
Rollo GambleWinstanley
★
Robin WentworthProf. Horner
David SimeonAlastair Fergus
James SnellHarry
★
John JoyceGarvin
★
Eric HillyardDr. Reeves