![Doctor Who: The Keys of Marinus](https://image.tmdb.org/t/p/original//i67VhAiP2j7xK0lvjtbY5VxVjyX.jpg)
![Doctor Who: The Keys of Marinus](https://image.tmdb.org/t/p/w200//oPlKsbfDbSKIl73hqZIo8fgRcpQ.jpg)
Doctor Who: The Keys of Marinus
2 hours 30 minutes1964-05-16
6.0
Watch Trailer
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.
Cast
![William Hartnell](https://image.tmdb.org/t/p/w200//yMNMzT2YVinyJLzqrzTC4clbnLT.jpg)
William Hartnell
The Doctor
![Carole Ann Ford](https://image.tmdb.org/t/p/w200//2rpy4eydA8pT4e8uUXSPpgxCVOc.jpg)
Carole Ann Ford
Susan Foreman
![Jacqueline Hill](https://image.tmdb.org/t/p/w200//aQGPgRYEcS26ALKea2dwVRsAJF9.jpg)
Jacqueline Hill
Barbara Wright
![William Russell](https://image.tmdb.org/t/p/w200//aOsH33Qcilx5yBn4e5CUuKtct0y.jpg)
William Russell
Ian Chesterton
![George Coulouris](https://image.tmdb.org/t/p/w200//cB87rJWOsstpwhBXk6nqqZ9SEJg.jpg)
George Coulouris
Arbitan
![Martin Cort](/_next/static/media/notFound.aecd17f8.png)
Martin Cort
Voord / Warrior / Ice Soldier / Aydan
![Peter Stenson](/_next/static/media/notFound.aecd17f8.png)
Peter Stenson
Voord / Ice Soldier / Second Judge
![Gordon Wales](/_next/static/media/notFound.aecd17f8.png)
Gordon Wales
Voord
![Robin Phillips](/_next/static/media/notFound.aecd17f8.png)
Robin Phillips
Altos
![Katherine Schofield](https://image.tmdb.org/t/p/w200//eY3Spn58F4XHiDBO6JFW6rfo16Z.jpg)
Katherine Schofield
Sabetha
![Heron Carvic](/_next/static/media/notFound.aecd17f8.png)
Heron Carvic
Voice of Morpho (voice)
![Edmund Warwick](/_next/static/media/notFound.aecd17f8.png)
Edmund Warwick
Darrius
![Francis de Wolff](https://image.tmdb.org/t/p/w200//g1JKH34BvvR7QOj05ZdcnFiPyVU.jpg)
Francis de Wolff
Vasor
![Michael Allaby](/_next/static/media/notFound.aecd17f8.png)
Michael Allaby
Ice Soldier / Larn
![Alan James](/_next/static/media/notFound.aecd17f8.png)
Alan James
Ice Soldier / First Judge / Guard
![Anthony Verner](https://image.tmdb.org/t/p/w200//cueIHzVloE8jfOmV3aRSiYUQnuH.jpg)
Anthony Verner
Ice Soldier
![Henley Thomas](/_next/static/media/notFound.aecd17f8.png)
Henley Thomas
Tarron
![Raf De La Torre](https://image.tmdb.org/t/p/w200//uOJzlRJ1jQlBtPIUL1bL3tToaL8.jpg)
Raf De La Torre
Senior Judge
![Fiona Walker](https://image.tmdb.org/t/p/w200//kAV47OufWAI4Bb09g70jlRiaKym.jpg)
Fiona Walker
Kala
![Donald Pickering](https://image.tmdb.org/t/p/w200//xj6BDD8VqMkP7Oy1KGWhqpkdk7U.jpg)
Donald Pickering
Eyesen
![Stephen Dartnell](/_next/static/media/notFound.aecd17f8.png)
Stephen Dartnell
Yartek
![Dougie Dean](/_next/static/media/notFound.aecd17f8.png)