Doctor Who: The Armageddon Factor
- Cast: Tom Baker, Mary Tamm, John Leeson, John Woodvine, Lalla Ward
- Duration: 150 minutes
- Genre: Action, Adventure, Drama, Science Fiction, TV Movie
- Rating: 5/10
- Release Date: 1979-02-24
The final segment of the Key to Time is at the heart of a devastating war between neighbouring planets Atrios and Zeos. The Fourth Doctor discovers that a sinister entity is manipulating events and the cost of obtaining the final segment may be more personal than he imagined.
