On screen
Cast
14 credited performers
Tom Baker
The Doctor
Elisabeth Sladen
Sarah Jane Smith
Stephen Thorne
Kastrian Eldrad
Artwork unavailable
Judith Paris
Eldrad (female form)
Artwork unavailable
Roy Pattison
Zazzka
Roy Skelton
King Rokon
Artwork unavailable
Rex Robinson
Dr. Carter
Glyn Houston
Professor Watson
Artwork unavailable
Frances Pidgeon
Miss Jackson
John Cannon
Elgin
Artwork unavailable
David Purcell
Abbott
Renu Setna
Intern
Artwork unavailable
Robin Hargrave
Guard
Roy Boyd
Driscoll