"The Impossible Planet" is the eighth episode of the second series of the British science fiction television series Doctor Who, which was first broadcast on BBC One on 3 June 2006. It is the first part of a two-part story. The second part, "The Satan Pit", was broadcast on 10 June.

The Tenth Doctor is an incarnation of the Doctor, the protagonist of the British science fiction television series Doctor Who. He is played by David Tennant in three series as well as nine specials. The character has also appeared in other Doctor Who spin-offs.