Doctor Who: Twice Upon a Time

Doctor Who: Twice Upon a Time (2017) is the British sci-fi Christmas special you can watch online on iFILM. The Twelfth Doctor is one breath away from regeneration — and flatly refuses to go.

Stranded in the Antarctic snow, Peter Capaldi's Doctor runs into his own first self, played by David Bradley, who is just as stubborn about not changing. Time freezes around them. A bewildered British captain falls out of a First World War trench, a glass-bodied alien harvests the memories of the dying, and Bill Potts (Pearl Mackie) briefly returns. Rachel Talalay directs.

This is Capaldi's farewell and a bridge to a new chapter: the Doctor regenerates here into Jodie Whittaker, the first woman to take the role. Ninety minutes of melancholy, dry jokes and callbacks to the very first 1966 episode — best enjoyed by viewers who already know the show, not newcomers. Stream Doctor Who: Twice Upon a Time (2017) online on iFILM.