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

My problem is that the audience is more fiction-literate than ever. In Shakespeare's day, you probably expected to see a play once or twice in your life; today you experience four or five different kinds of fiction every day. So staying ahead of the audience is impossible.

Everybody knows that everybody dies. But not every day. Not today. Some days are special. Some days are so, so blessed. Some days, nobody dies at all. Now and then, every once in a very long while, every day in a million days, when the wind stands fair and the Doctor comes to call, everybody lives.

People don't really have a relationship with great writing or great production or great art direction or great direction. They just sort of admire it.

It's a TV show. Only the emotional damage is real.

What's the point of being a grown-up if you don't get to be immature?

The Doctor: Oh, now what's this, then? I love this. A big, flashy-lighty thing. That's what brought me here. Big, flashy-lighty things have got me written all over them. Not actually, but give me time... and a crayon.