I'll be a story in your head. That's okay. We're all stories in the end. Just make it a good one, eh? 'Cause it was, you know. It was the best. The daft old man who stole a magic box and ran away. Did I ever tell you that I stole it? Well I borrowed it. I was always going to take it back.

The Doctor...is embarrassingly human for an alien.

Writing for adults often means just increasing the swearing - but find an alternative to swearing and you've probably got a better line.

The Doctor: 'You know when grown-ups tell you everything's going to be fine, but you really think they're lying to make you feel better?' Amelia: 'Yeah...' The Doctor: 'Everything's going to be fine.

Young Reinette: Monsieur, be careful! The Doctor: It's just a nightmare, Reinette, don't worry, everyone has nightmares. Even monsters under the bed have nightmares! Young Reinette: What do monsters have nightmares about? The Doctor: Me!

We have a plan to top it. And I do think our plan is devastating. We’ve practically reduced our cast to tears telling them the plan … we’re probably more excited that we’ve ever been about Sherlock.

The way you get your script to the right people is that you put it in an envelope. It's easy. The difficult bit is writing something that is so good people will take a punt on a brand new writer.