Peter Capaldi will make his final appearance as the 12th Doctor Who on the Christmas Day special called "Twice Upon a Time." That's when he'll hand over the reigns of his identity to a new incarnation to be played by Jodie Whittaker. In honor of the occasion, BBC America has released a video of fan tributes to Capaldi's work on the series.
They also tell us a little of the story in the Doctor Who special.
Two Doctors stranded in an Arctic snowscape, refusing to face regeneration. Enchanted glass people, stealing their victims from frozen time. And a World War One captain destined to die on the battlefield, but taken from the trenches to play his part in the Doctor's story.
-via Laughing Squid