
Released
The TARDIS arrives on the planet Marinus on an island of glass surrounded by a sea of acid. The travellers are forced by the elderly Arbitan to retrieve four of the five operating keys to a machine called the Conscience of Marinus, of which he is the keeper. These have been hidden in different locations around the planet to prevent them falling into the hands of the evil Yartek and his Voord warriors, who plan to seize the machine and use its originally benevolent mind-influencing power for their own sinister purposes.
Keywords
time travel
alien
distant planet
Casts

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)
Crews
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
Backdrops & Posters







