Once the nation's favourite, by its third year Doctor Who was in trouble. With changes afoot in the production office and increasing problems with its lead actor, the programme was heading for the Last Chance Saloon.
The team behind the reconstruction of Planet of Giants explain how it was put together.
The cast and crew of Frontios reflect on the making of this story.
The exploits of a team of people whose job is to investigate the unusual, the strange and the extraterrestrial.