Turn Left (Doctor Who) Turn Left (Doctor Who) "Turn Left" is the eleventh episode of the fourth series of British science fiction television series "Doctor Who". It was written by showrunner Russell T Davies and broadcast on BBC One on 21 June 2008. David Tennant only makes a small contribution to this "Doctor-lite" episode as the Tenth Doctor. The story instead focuses on the Doctor's companion, Donna Noble (Catherine Tate) and her encounters with former companion Rose Tyler (Billie Piper). The episode's narrative focuses on an alternative history where the Doctor dies during the events of the 2006 Christmas special "The Runaway Bride". The
Doctor Who (series 1) considered for the role. Piper was announced as portraying Rose Tyler on 24 May, a character which fulfilled the role of permanent companion during the series, and was welcomed by fans of the show. Actress Georgia Moffett, daughter of Fifth Doctor actor Peter Davison and who would later appear as the title role in the fourth series episode "The Doctor's Daughter", also auditioned for the role. The original conception of Tyler was slightly different. Paul Abbott was scheduled to write an episode for the series which would have revealed that Rose's entire life had been manipulated by the Doctor in