It is now confirmed that Billie Piper will return to Doctor Who for the 50th Anniversary. The episode will be 90 minutes long and be simualcast worldwide on the 23rd of November 2013. It will also be released in more than 400 cinmeas in 3D this November! Other cast members included are, David Tennant, Matt Smith, Jenna Coleman and John Hurt. The special is written by Steven Moffat.