Is Peter Capaldi. (c) BBC It's a very interesting choice, too. As every Whovian knows, Peter played Caecilius in the Tenth Doctor episode The Fires of Pompeii (S04E02) and played John Frobisher in the spin-off Torchwood Children of Earth . It's going to be awesome though because Peter is a great actor. I just wonder how the writers will play off this incarnation of The Doctor since he was already in an episode plus the spin-off. Also, if, and only if, Captain Jack Harkness will be back, I wonder how he will react when he sees Doctor Number 12. It's probably just a case of another wibbly, wobbly, timey, wimey stuff. This is also my 12th post so it's probably destiny , fate , a coincidence.