Calificación
Reparto

William Hartnell
The Doctor

Jacqueline Hill
Barbara Wright

William Russell
Ian Chesterton

Maureen O'Brien
Vicki

Catherine Fleming
Animus (voice)

Roslyn de Winter
Vrestin

Arne Gordon
Hrostar

Arthur Blake
Hrhoonda

Jolyon Booth
Hlynia

Jocelyn Birdsall
Hlynia

Martin Jarvis
Hillo

Ian Thompson
Hetra

Barbara Joss
Nemini

Robert Jewell
Zarbi

Jack Pitt
Zarbi

Gerald Taylor
Zarbi