Doctor Who: The Keys of Marinus
- Jier: 1964
- Lân: United Kingdom
- Sjenre: Science Fiction, Drama, Adventure
- Studio: BBC
- Keyword: time travel, alien, distant planet
- Direkteur: John Gorrie
- Cast: William Hartnell, Carole Ann Ford, Jacqueline Hill, William Russell, George Coulouris, Martin Cort