Following tonight's thrilling episode of Doctor Who, the BBC have released a new image (pictured right) featuring The 12th Doctor (Peter Capaldi) and The 1st 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 Timelord ("The original, you might say") just before the credits rolled. The story will continue at Christmas.

This will be the first time that the First Doctor has played an active onscreen role in Doctor Who since 1983's The Five Doctors, when the character returned to the series following his regeneration almost 20 years prior. Doctor Who's most recent multi-Doctor episode aired in 2013, when The Day Of The Doctor marked the series' 50th anniversary. 

Viewers will have to wait until Christmas Day to find out what happens next, and how exactly The Doctor finally meets his end and regenerates into the (as yet unknown) 13th Doctor!  

DWO also have a second image, which you can view in the image pane to the right, which features a distance shot of the two Doctors on the snowy landscape we saw at the beginning of World Enough And Time, and at the end of The Doctor Falls. 

Watch an interview DWO conducted with David Bradley back in November 2013, about the possibility of returning to the role of The 1st Doctor: