On screen
Cast
16 credited performers
Patrick Troughton
The Doctor
Frazer Hines
Jamie McCrimmon
Wendy Padbury
Zoe Heriot
James Copeland
Selris
Artwork unavailable
James Cairncross
Beta
Gilbert Wynne
Thara
Philip Madoc
Eelek
Artwork unavailable
Terence Brown
Abu
Artwork unavailable
Madeleine Mills
Vana
Richard Ireson
Axus
Artwork unavailable
Maurice Selwyn
Custodian
Artwork unavailable
Bronson Shaw
Student
Roy Skelton
Kroton Voice
Artwork unavailable
Patrick Tull
Kroton Voice
Artwork unavailable
Robert La'Bassiere
Kroton
Artwork unavailable
Miles Northover
Kroton