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