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.

Cast:Sylvester McCoy, Sophie Aldred, Sheila Hancock, Ronald Fraser, Georgina Hale, Harold Innocent,

Genre:Science Fiction, Drama, Adventure,

country:United Kingdom,

Production:BBC,