On screen
Cast
19 credited performers
William Hartnell
The Doctor
Jacqueline Hill
Barbara Wright
William Russell
Ian Chesterton
Maureen O'Brien
Vicki
Artwork unavailable
Catherine Fleming
Animus (voice)
Artwork unavailable
Roslyn de Winter
Vrestin
Artwork unavailable
Arne Gordon
Hrostar
Artwork unavailable
Arthur Blake
Hrhoonda
Artwork unavailable
Jolyon Booth
Prapillus
Artwork unavailable
Jocelyn Birdsall
Hlynia
Martin Jarvis
Hilio
Artwork unavailable
Ian Thompson
Hetra
Artwork unavailable
Barbara Joss
Nemini
Artwork unavailable
Robert Jewell
Zarbi
Artwork unavailable
Jack Pitt
Zarbi
Gerald Taylor
Zarbi
Artwork unavailable
Hugh Lund
Zarbi
Artwork unavailable
Kevin Manser
Zarbi
Artwork unavailable
John Scott Martin
Zarbi