Doctor Who: The Keys of Marinus
- Joer: 1964
- Land: United Kingdom
- Genre: Science Fiction, Drama, Adventure
- Studio: BBC
- Schlësselwuert: time travel, alien, distant planet
- Direkter: John Gorrie
- Besetzung: William Hartnell, Carole Ann Ford, Jacqueline Hill, William Russell, George Coulouris, Martin Cort