The Doctor checks in to a very unusual hotel – here's how to watch "Doctor Who" Christmas special "Joy to the World" online on BBC iPlayer in the UK and on Disney Plus in the US.

Joy's ending might seem a little morbid for a Doctor Who Christmas special, but the show's got form – in fact, Joy's sacrifice is very reminiscent of Kylie Minogue's guest appearance in Voyage of the Damned, which saw her character Astrid sacrifice herself to save the Doctor, dissipating into atoms.

Doctor Who Joy to the World features Ncuti Gatwa as the Doctor and Nicola Coughlan as Joy Almondo. The episode combines festive cheer with suspenseful time-travel adventures in the mysterious Time Hotel.