On screen
Cast
11 credited performers
Tom Baker
The Doctor / Meglos
Lalla Ward
Romana II
John Leeson
K9 (voice)
Bill Fraser
General Grugger
Frederick Treves
Lieutenant Brotadac
Edward Underdown
Zastor
Jacqueline Hill
Lexa
Artwork unavailable
Colette Gleeson
Caris
Artwork unavailable
Crawford Logan
Deedrix / Meglos (voice) (uncredited)
Artwork unavailable
Christopher Owen
Earthling
Artwork unavailable
Simon Shaw
Tigellan Guard