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
The Doctor
Anneke Wills
Polly
Michael Craze
Ben Jackson
Frazer Hines
Jamie McCrimmon
Peter Jeffrey
Pilot
Graham Armitage
Barney
Ian Fairbairn
Questa
Jane Enshawe
Sunaa
