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,
Music of the Spheres (Doctor Who) admiring composer Giacomo Puccini; and the Ninth Doctor dancing with Rose Tyler to "In The Mood" by Glenn Miller in "The Doctor Dances". In writing the episode, Davies expressed hope that "this mini-adventure [would show] that music can take any shape or form, whether it’s singing, or playing the recorder, or even the spoons." He states that "music can go anywhere, reach anyone, and make better people of us all. Just like the Doctor." The mini-episode was filmed on Saturday 3 May 2008, the last day of filming for Series 4 of "Doctor Who", in the BBC Wales studios at