Calificación
Reparto

Jon Pertwee
The Doctor

Katy Manning
Jo Grant

Leslie Dwyer
Vorg

Cheryl Hall
Shirna

Tenniel Evans
Major Daly

Ian Marter
John Andrews

Jenny McCracken
Claire Daly

Peter Halliday
Pletrac

Michael Wisher
Kalik

Terence Lodge
Orum