When the Second Doctor, Polly, Ben and Jamie visit a human colony that appears to be one big holiday camp, they think they have come across a truly happy place. Yet a shadowy presence soon makes them realise that the surface contentment is carefully controlled.
Patrick Troughton
Anneke Wills
Michael Craze
Frazer Hines
Peter Jeffrey
Graham Armitage
Ian Fairbairn
Jane Enshawe
Sandra Bryant
Karol Keyes
Maureen Lane
Terence Lodge
Gertan Klauber
Graham Leaman
Anthony Gardner
Denis Goacher
Richard Beale
Robert Jewell
John Harvey
John Caesar
Steve Emerson
Danny Rae
Ralph Carrigan
Roger Jerome
Terry Wright