"The Doctor's Daughter" is the sixth episode of the fourth series of British science fiction television series Doctor Who. It was broadcast on BBC One on 10 May 2008. Set on the planet Messaline, the episode features Georgia Moffett as Jenny, the cloned daughter of the series' protagonist, the alien time traveller the Tenth Doctor (David Tennant). The plot of the episode involves two factions of clones descended from a group of human and alien Hath pioneers, each of whom are seeking to wipe out the other side with a lost artefact called the Source, while the Doctor also comes to accept Jenny as his real daughter.