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.
Evil Time Lord Skagra seeks out the location of Shada, a lost planet which was once home to a Time Lord prison. This unofficial special fan cut version of the unfinished story reunites some of the original cast and animates the unfilmed scenes.
The Doctor and Peri arrive in Singapore, where a travelling street theatre is in town, old friends and enemies await.
The exploits of a team of people whose job is to investigate the unusual, the strange and the extraterrestrial.
