If it’s time to go, remember what you’re leaving. Remember the best.

My priorities are where they should be, which is making really great, really exciting television.

I don't think, generally speaking, people become writers because they were the really good, really cool, attractive kid in class. I'll be honest. This is our revenge for people who were much better looking and more popular than us. I was a bit like that, I suppose.

Cinema is so slow and boring compared to television.

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

Madame Kovarian: The anger of a good man is not a problem. Good men have too many rules. The Doctor: Good men don't need rules. Today is not the day to find out why I have so many.

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