The Doctor
Tom Baker
Leela
Louise Jameson
Goudry
Michael Keating
Nurse
Carole Hopkin
Synge
Derek Crewe
Commander
Colin McCormack
Guard
Tom Kelly
K9 Mk. I (voice)
John Leeson
The Collector
Henry Woolf
Gatherer Hade
Richard Leech
Marn
Jonina Scott
Cordo
Roy Macready
Bisham
David Rowlands
Mandrel
William Simons
Veet
Adrienne Burgess
Original Music Composer
Dudley Simpson
Director
Pennant Roberts
Writer
Robert Holmes
Script Editor
Anthony Read
Producer
Graham Williams