The Doctor needs somewhere peaceful to recover from his traumatic regeneration. But the sanctuary of Castrovalva is not all it seems, as the Master will stop at nothing to gain his revenge over the Doctor...
Peter Davison
Matthew Waterhouse
Sarah Sutton
Janet Fielding
Anthony Ainley
Dallas Cavell
Frank Wylie
Derek Waring
Michael Sheard
Souska John
Tom Baker
Adrian Gibbs