“The Day of the Doctor” is the 50th-anniversary special of the extremely popular British science fiction television program Doctor Who.
David Tennant and Billie Piper, who previously starred in Doctor Who as the Tenth Doctor and Rose Tyler will appear in the special alongside the Eleventh Doctor Matt Smith. John Hurt will also appear as a previously unknown, past incarnation of the Doctor, the “War Doctor”, introduced at the end of the Series 7 finale “The Name of the Doctor”.
Joanna Page stars in this episode. Jemma Redgrave returns as Kate Stewart. The special will feature the return of the Daleks, as well as the return of the Zygons, shape-shifting aliens which up until now have only appeared in the 1975 serial Terror of the Zygons.