The Doctor visits his old Time Lord friend Chronotis in Cambridge, 1979. But the ruthless Skagra has also arrived to retrieve a book that will help unlock one of the Time Lords' greatest secrets: what is Shada? Filming for this story was never finished, and in this version the unfilmed material is completed via animation.
Tom Baker
as The Doctor
Lalla Ward
as Romana
David Brierly
as K-9 (voice)
Christopher Neame
as Skagra
Daniel Hill
as Chris Parsons
Denis Carey
as Professor Chronotis
Victoria Burgoyne
as Clare Keightley
Gerald Campion
as Wilkin
Shirley Dixon
as The Ship (voice)
Derek Pollitt
as Dr. Caldera
James Coombes
as The Krargs (voice)
John Hallet
as Police Constable
