Phobos is an audio drama based on the long-running British science fiction television series Doctor Who.

This audio drama was produced by Big Finish Productions and was broadcast on BBC 7 on 28 January 2007.

The Doctor and Lucie land on Phobos, the moon of Mars, which has become popular with extreme sports fans in the future, due to a wormhole on the surface which is used for bungee jumping.

The Doctor and Lucie listen to Kai Tobias's stories of monsters on the surface, although no-one takes him seriously.

When The Doctor discovers that the monsters are just robots, Tobias reveals that an entity from another universe is in the wormhole and that it feeds on the pleasurable fear extreme sports fans feel.