"The Runaway Bride" is a special episode of the long-running British science fiction television programme Doctor Who, starring David Tennant as the Tenth Doctor. It was produced as the Doctor Who Christmas special for 2006, broadcast on 25 December, and aired between the second and third series of the relaunched show.

In the episode, set in London, the alien Racnoss Empress (Sarah Parish) and the human resources head Lance (Don Gilet) attempt to use Lance's fiancée, the secretary Donna Noble (Catherine Tate), as a "key" to awaken the Racnoss children hibernating at the centre of the Earth by gradually and secretly poisoning Donna with an alien particle the Racnoss use as an energy source.