Tom Baker
The Doctor
Matthew Waterhouse
Adric
Sarah Sutton
Nyssa
Geoffrey Beevers
Melkur / The Master
Anthony Ainley
Tremas / The Master
Sheila Ruskin
Kassia
John Woodnutt
Seron
Robin Soans
Luvic
Denis Carey
The Keeper
Margot Van der Burgh
Katura
Roland Oliver
Neman
Liam Prendergast
Foster
Philip Bloomfield
Foster