Doctor Who: The Keys of Marinus (1964) is a Science Fiction, Drama, Adventure film that follows 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. Doctor Who: The Keys of Marinus is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.9 out of 10 from 12 votes. Fans of science fiction movies may also want to explore similar titles below.