It's Christmas Eve in 1851 and Cybermen stalk the snow of Victorian London. But when the Doctor meets another Doctor, the two must combine forces to defeat the ruthless Miss Hartigan and stop the rise ...

Christmas Eve, 1851, and Cybermen stalk the snow of Victorian London. But when the Doctor meets another Doctor, the two must combine forces to stop the rise of the CyberKing. Meet the new Doctor!

Betting has been suspended on the Death In Paradise actor taking over from Peter Capaldi. But just because lots of people think he's a surefire bet to take on the role doesn't mean anything is final.

Tennant, Matt Smith, Peter Capaldi and Jodie Whittaker each did three seasons before handing over the reins to the next Doctor.