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)

John Gorrie

Director

Terry Nation

Guión

David Whitaker

Script Editor

Peter Murray

Director de Fotografía

Norman Kay

Compositor de la Música Original, Música

Verity Lambert

Productor

NBC Studios

Compañía de Produccion

Mervyn Pinfield

Productor Asociado

Daphne Dare

Diseño de Vestuario

Jill Summers

Makeup & Hair