Cast 22
William Hartnell
The Doctor
Carole Ann Ford
Susan Foreman
Jacqueline Hill
Barbara Wright
William Russell
Ian Chesterton
George Coulouris
Arbitan
Martin Cort
Voord / Warrior / Ice Soldier / Aydan
Peter Stenson
Voord / Ice Soldier / Second Judge
Gordon Wales
Voord
Robin Phillips
Altos
Katherine Schofield
Sabetha
Heron Carvic
Voice of Morpho (voice)
Edmund Warwick
Darrius
Francis de Wolff
Vasor
Michael Allaby
Ice Soldier / Larn
Alan James
Ice Soldier / First Judge / Guard
Anthony Verner
Ice Soldier
Henley Thomas
Tarron
Raf De La Torre
Senior Judge
Fiona Walker
Kala
Donald Pickering
Eyesen
Stephen Dartnell
Yartek
Dougie Dean
Eprin (uncredited)
Crew 9
John Gorrie
Director
Terry Nation
Writer
Mervyn Pinfield
Associate Producer
Jill Summers
Makeup & Hair
Daphne Dare
Costume Design
David Whitaker
Script Editor
Verity Lambert
Producer
Norman Kay
Music
Delia Derbyshire
Theme Song Performance