William Hartnell
The Doctor
Acting
Carole Ann Ford
Susan Foreman
Acting
Jacqueline Hill
Barbara Wright
Acting
William Russell
Ian Chesterton
Acting
George Coulouris
Arbitan
Acting
Martin Cort
Voord / Warrior / Ice Soldier / Aydan
Acting
Peter Stenson
Voord / Ice Soldier / Second Judge
Acting
Gordon Wales
Voord
Acting
Robin Phillips
Altos
Acting
Katherine Schofield
Sabetha
Acting
Heron Carvic
Voice of Morpho (voice)
Acting
Edmund Warwick
Darrius
Acting
Francis de Wolff
Vasor
Acting
Michael Allaby
Ice Soldier / Larn
Acting
Alan James
Ice Soldier / First Judge / Guard
Acting
Anthony Verner
Ice Soldier
Acting
Henley Thomas
Tarron
Acting
Raf De La Torre
Senior Judge
Acting
Fiona Walker
Kala
Acting
Donald Pickering
Eyesen
Acting
Stephen Dartnell
Yartek
Acting
Dougie Dean
Eprin (uncredited)
Acting