Who will be next to take on the keys to the Tardis?The name of the actor who will replace David Tennant in Doctor Who will be announced on Saturday. Tennant said in October that he would stand down from the show after filming four special episodes in 2009. His replacement - the eleventh Doctor of the TV series - will be revealed in a Doctor Who Confidential programme on BBC One at 1735 on 3 January. The casting was confirmed over Christmas and filming for the 2010 series begins in the summer. Tennant is due to begin shooting the first of his four specials this month, just weeks after surgery on his back. Please turn on JavaScript. Media requires JavaScript to play.
