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,
Turn Left (Doctor Who) what Donna will become. The Doctor hears Donna scream and turns up in the booth. After examining the beetle, the Doctor comments on how it was odd for an alternative universe to form around her, explaining that the beetle worked for The Trickster with the job of changing people's lives in various ways. His remarks cause Donna to recall Rose and her message, which she delivers to the Doctor. Rose had told her two words: "Bad Wolf". A panicked Doctor, realising who Donna must have met, runs out of the room to find the words "Bad Wolf" written everywhere once