Sharp-eyed Doctor Who fans will spot a plug for rival drama Game Of Thrones in the science fiction show's Christmas special.
Show supremo Steven Moffat paid tribute to the bloodthirsty fantasy epic in one of the final scenes of the episode.
Viewers will see a character with a plan for a perfect day's festive viewing which includes the classic Miracle On 34th Street and a "thrones marathon".
Moffat, who is also behind the success of Sherlock, admitted he nearly added a Doctor Who episode to the list but said it would be "too self-reverential".
Speaking at a preview screening in central London, Peter Capaldi said playing the Time Lord had been "a pleasure".