This year’s Doctor Who クリスマス special could be a rare double Doctor episode, with Peter Capaldi’s departing thirteenth incarnation being joined によって the 1ST Doctor, played によって An Adventure in 宇宙 and Time 星, つ星 David Bradley.
“Do あなた feel that River Song’s story is done?”Showrunner replied: "Well, yes, that does seem like the end to me. Except, of course, it isn’t, and can’t be. There’s always the chance that River will 表示する up again."
Departing head writer Steven Moffat will let his successor decide the first thing that comes out of the new Doctor's mouth when Capaldi regenerates in the クリスマス special.