Speaking at a Doctor Who event at The Ritz Cinema & Theatre in Lincoln earlier today, actor Ian McNeice revealed that the character of Winston Churchill would make another appearance in Doctor Who. Their Twitter feed stated:
It is not currently known what episode McNeice was referring to, or which Doctor (or Doctors) he would be facing. Churchill was last seen in the Series 6 finale, The Wedding of River Song.
UPDATE: The initial tweet has been deleted, seems they might have misinterpreted his words.