Doctor Who (2013 specials) Doctor", saw the departure of Smith from the series and the introduction of Peter Capaldi as the Twelfth Doctor. "The Day of the Doctor" features the return of the Zygons for the first time since "Terror of the Zygons" in 1975. "The Time of the Doctor" draws together a number of plot threads that have run through the series since the Eleventh Doctor's first episode in 2010. <onlyinclude></onlyinclude> In "The Day of the Doctor", Smith and Coleman star alongside David Tennant and Billie Piper; Tennant reprised his role as the Tenth Doctor, while Piper, although credited as playing Rose Tyler,
Rose (Doctor Who episode) and Noel Clarke were also cast to play Rose's mother and boyfriend respectively; Davies wanted to include these characters to "make her real" and to "give her a life". Rose's family is also working-class, which had rarely been seen in companions on the show prior to "Rose". The episode name had gradually been shortened; in Davies's pitch it had been called "Rose meets the Doctor, and the journey begins", on his contract "Rose Meets The Doctor", and finally shortened to "Rose". Also changed from Davies's original pitch were the names of the supporting characters: Judy Tyler became Jackie Tyler, and