Russell T Davies, the current head writer and executive producer for Doctor Who, has recently confirmed the running time for the last Doctor Who special episode of the year, which sees the regeneration of the 10th Doctor, and also the return of the Master, Donna Noble, and many others. He stated that the episode, apparently called “The End of Time”, will run for one hour and fifteen minutes. The episode stars David Tennant, Catherine Tate, John Simm, Bernard Cribbins, among many other people, and it will air over the Christmas time.