The BBC has revealed a first look at Doctor Who's Christmas special.
The closing moments of Saturday evening’s Doctor Who series ten finale revealed that this year’s Doctor Who Christmas special.
It will be a multi-Doctor adventure featuring the current Doctor (Peter Capaldi) alongside the First Doctor (David Bradley).
The cliff-hanger ending saw the Doctor fatally shot by a Mondasian Cyberman and begin to regenerate.
Stepping out of the TARDIS into an arctic landscape, he fought off the glowing regeneration energy and fell to his knees, vowing that this time he would not live on and change into a new Doctor.
This was declared 'ridiculous' by an approaching figure, who mocked the Doctor as he stepped forward through the snow to reveal himself as the very first incarnation of the Time Lord ("The original, you might say") just before the credits rolled.
The story will continue at Christmas with the festive special airing on Christmas Day.
Further casting and details for the Doctor Who Christmas special will be revealed in due course, including the still as yet unconfirmed identity of the next Doctor.
As previously announced, the special will serve as Peter Capaldi's farewell to the series, and will feature the debut of the next Doctor.
One of the favourites for the role is comedian Richard Ayoade although others tipped to takeover include Phoebe Waller-Bridge and Kris Marshal
A source told The Sun newspaper previously: “The final decision is still some way off and it’s all to play for.
Doctor Who's Christmas Special airs on December 25, 2017.