The show’s 50th anniversary special, ‘The Day of the Doctor’ aired at the weekend and saw Capaldi briefly appear as the Doctor for the first time, but the actor will make his official debut in this year’s Christmas special.

> Read our review of ‘The Day of the Doctor’.

Moffat told journalists at the Official Doctor Who Celebration in London yesterday: “We’ve only seen the tiniest moment. It’s just the beginning of a process really. Of course, he’s brilliant. And just seeing the energy and vitality that he brings to his performance, he works – he’s like Matt [Smith] – he works, he’s a worker. And he’s an extraordinary vital performer.”

He added: “The man is not at all elderly in style, he leaps around the place probably more than any other Doctor in that first scene. But that’s not how he’s gonna play it, he’s in a state of post-regeneration madness. It’s something we’re still working on.”

> Find out everything we know so far about Peter Capaldi’s Doctor in our news summary.

Series 8 begins filming at the end of next month and is expected to start airing on BBC One in August 2014.

> Find out all the latest info on Series 8 in our news summary.

What are your hopes for Peter Capaldi’s Doctor? Let us know below…

> Order the 50th anniversary special on DVD on Amazon.

> Order the 50th anniversary special on Blu-ray on Amazon.

Watch the 50th anniversary trailer…