Sherlock Holmes can be wise and funny. He wasn't, at the beginning. But later on, he's got a bantering relationship with loads of people. He's got a wisdom that he didn't have in the early stage. But he stays on the mountain top, and he will die up there. He's not going to change that.

You want weapons? We're in a library! Books! The best weapons in the world!

Do you know how you make someone into a Dalek? Subtract Love, add Anger.

It’s been a long time since Sherlock Holmes jumped off that roof - it’s time to reveal the truth about what happened between him and the pavement.

I write the kind of stuff I'd like to watch.

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.

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.