Doctor Who: Shada
Overview
Shada: a prison built by the Time Lords for defeated would-be conquerors of the universe. A scientist named Skagra needs the help of one of the prison's inmates. He finds nobody knows where Shada is anymore, except one aged Time Lord who has retired to Earth, where he is a professor at St Cedd's College. Luckily for the universe, Skagra's attempt to force the information out of Professor Chronotis coincides with a visit by the professor's old friend, The Doctor.
Cast

Tom Baker
The Doctor / Narrator

Lalla Ward
Romana

David Brierley
K9 /Computer (voice)

Christopher Neame
Skagra
Denis Carey
Professor Chronotis

Daniel Hill
Chris Parsons

Victoria Burgoyne
Clare Keightley

Gerald Campion
Wilkin
Derek Pollitt
Dr. Caldera

Shirley Dixon
The Ship (voice)
John Hallet
Police Constable
David Strong
Passenger