The TARDIS arrives on the planet Terra Alpha, where the Seventh Doctor and Ace discover a society in which sadness is against the law - a law enforced zealously by the brightly uniformed Happiness Patrol. The planet is ruled by Helen A with the aid of her companion, Joseph C, and her carnivorous pet Stigorax, Fifi.
Sylvester McCoy , Sophie Aldred , Sheila Hancock , Ronald Fraser , Georgina Hale , Harold Innocent , Lesley Dunlop , Rachel Bell , Jonathan Burn , Tim Barker
BBC
