What is immutable about Sherlock Holmes? He favors reason over emotion, but actually underneath that, there is a lot of emotion going on. You can't suddenly make him ordinary because he would hate that. He's not suddenly going to be somebody else.

Never ignore a coincidence. Unless you're busy, in which case, always ignore a coincidence.

I hope I won't become hated by geeks everywhere, but I don't really know comic books all that well.

Come on, Rory! It isn't rocket science, it's just quantum physics! -The Doctor (Matt Smith)

I think of myself as a writer with a sense of humour rather than a comedy writer. Happy to tell a story with lots of jokes in it - I wouldn't know how to do jokes without the story.

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

If you take most men aside when their wives are pregnant, most men are pretty frightened and worried and faintly disgusted by the whole experience.