Calificación
Reparto

Tom Baker
The Doctor

Lalla Ward
Romana

Eileen Way
Karela

Myra Frances
Lady Adrasta

Geoffrey Bayldon
Organon

David Brierly
K-9 (voice)

David Telfer
Huntsman

Morris Barry
Tollund

John Bryans
Torvin

Edward Kelsey
Edu

Tim Munro
Ainu

Philip Denyer
Guard

Terry Walsh
Doran / Mensch

Tommy Wright
Guardsmaster

David Redgrave
Guard