Calificación
Reparto

Patrick Troughton
The Doctor

Anneke Wills
Polly

Michael Craze
Ben Jackson

Frazer Hines
Jamie McCrimmon

Patrick Barr
Hobson

André Maranne
Benoit

Michael Wolf
Nils

John Rolfe
Sam

Mark Heath
Ralph

Alan Rowe
Voice from Space Patrol/Dr. Evans

Denis McCarthy
Voice of Rinberg

Barry Ashton
Scientist

Derek Calder
Scientist

Arnold Chazen
Scientist

Leon Maybank
Scientist

Victor Pemberton
Scientist