The Doctor, Clara, and Jack Darkness fall through there time vortex into an alternate dimension where they are television characters and meet the actors who play them: Matt Smith, Jenna Coleman, and John Barrowman. In addition, they also encounter series alums David Tennant (Tenth Doctor), Catherine Tate (Donna Noble), Billie Piper (Rose Tyler), Alex Kingston (River Song), John Simm (The Master), Karen Gillan (Amy Pond), and more. Just in time for the premiere of the show's 50th anniversary special, The Day of the Doctor.