Sometimes as the Doctor, the most memorable moments are not the strongest lines – it’s what he does with his pauses and his changes of tone. He’ll just say ‘Oh good’ or ‘You’d better go outside’ in this particular way and it sticks with you far more than the finest scripting.

His Doctor is a completely different character – from any previous Doctor but also from Malcolm. I’ve watched every episode with my three kids – they’ve been amazed by the transformation. The eldest has seen Malcolm Tucker but the others just know Peter from when he’s been over to the house.
He took us all on set while filming – which was great for the two younger children especially but frankly it was pretty good for me. He gave us the full tour and seemed to know how it all works.

He’s funny in a bamboozled way. And that allows Clara more space so they’ve become a proper, classic double act. He’s also the first Doctor to give off that air of the tremendous responsibility – which you never quite saw before.
He has great gravitas, but he can flick in a second to moments of beautiful slapstick.
The recent episode featuring 2D creatures where he was trapped in a tiny Tardis, was a perfect moment of silly comedy that it would have been easy to mess up. Then the episode ended with him addressing those creatures – ‘This planet is under my protection.’ It was a tremendously cathartic moment for the Doctor, I think, but it’s a hard combination for an actor to play, and he nailed it.

(Capaldi running in the role) It’s always hilarious. Stop it, pause it and go back. It’ll be worth it every time.