Steven Moffat:
Can tu set the scene for this navidad episode?

It’s his final battle and he’s been fighting it for a while. The Doctor is facing the joint challenge of a mysterious event in el espacio that has summoned lots of aliens to one place and helping Clara cook navidad dinner. There are also elements from every series of Matt’s Doctor, which will come to a head in this special. Things that we’ve laid down for years are going to be paid off.

How was the read-through?

It was emotional. I think possibly the beginning of the end is más emotional than the actual end. It was the same with ‘The ángeles Take Manhattan’, when Karen and Arthur left. The read-throughs are the moments that tend to get people because obviously the shoot dissolves into what we hope will be a tremendously exciting envolver, abrigo party.

Did tu know what tu wanted Matt’s last words to be?

I didn’t think I would go that way, but a couple of months before I wrote it I did say to Mark (Gatiss) that I thought I knew what his last moment would be. And indeed his last line. But if it didn’t fit the scene I wouldn’t crowbar it in. I’ve had the vague storyline in place for a long while.

What episodes o scenes do tu think will define Matt’s time as the Doctor?

I think ‘The Eleventh Hour’ was such an extraordinary debut. Everybody for a año of poor Matt Smith’s life had been saying, ‘total mistake. He’s far too young.’ Then he came in and he was brilliant. ‘Vincent And The Doctor’ was also such a lovely episode and I was thrilled Richard Curtis was able to write for the show. There’s the physical comedy that Matt has brought and of course pescado fingers and custard. I think his relationship with his own TARDIS in ‘The Doctor’s Wife’ was gorgeous.

What do tu think distinguishes Matt from the other Doctors?

I think he does old Doctor better than anybody else. It’s not an accident. It’s something he very, very consciously thought about. Because he was the youngest Doctor Matt said, ‘he’s only got young skin. Nothing else is young.’ I think Matt makes tu think very believably that he is this ancient being.

The navidad special will introduce the siguiente Doctor, played por Peter Capaldi. What was it about Peter that tu thought was right for the role?

He’s one of the best actors in the country and is very beloved. I was at the BAFTAs shortly before we were contemplating Peter and heard the cheer he got from the audience. Nobody has a bad thing to say about him and that’s not a minor issue when it comes to casting a Doctor. They’ve got to be lovely. And he’s a huge fan of Doctor Who. So we asked and he was incredibly excited to come and audition. We didn’t tell him that he was the only person auditioning because that would be oddly pressuring.

Did tu deliberately aim to cast an older Doctor?

It wasn’t the reason I cast Peter but I do think if we’d cast another Doctor as young as Matt – because Matt’s been so good at being The Young Doctor – I’m not sure what another one would have done. They’d have to have either been deliberately different o just repeat him.