Doctor Who: The Keys of Marinus

Synopsis

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.

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