On screen
Cast
21 credited performers
Colin Baker
The Doctor
Bonnie Langford
Mel Bush
Michael Jayston
The Valeyard
Lynda Bellingham
The Inquisitor
Honor Blackman
Professor Sarah Lasky
Michael Craig
Commodore Travers
Denys Hawthorne
Rudge
Yolande Palfrey
Janet
Malcolm Tierney
Doland
Artwork unavailable
David Allister
Bruchner
Artwork unavailable
Tony Scoggo
Grenville
Arthur Hewlett
Kimber
Artwork unavailable
Simon Slater
Edwardes
Artwork unavailable
Sam Howard
Atza
Artwork unavailable
Leon Davis
Ortezo
Artwork unavailable
Hugh Beverton
First Guard
Artwork unavailable
Barbara Ward
Mutant / Ruth Baxter
Artwork unavailable
Mike Mungarvan
Duty Officer
Artwork unavailable
Martin Weedon
Second Guard
Artwork unavailable
Peppi Borza
First Vervoid
Artwork unavailable
Bob Appleby
Second Vervoid