I always rip out the last page of a book. Then it doesn't have to end. I hate endings!

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

The Doctor: Just had a fall. All the way down there, right to the library. Heck of a climb back up. Amelia: You're soaking wet. The Doctor: I was in the swimming pool. Amelia: You said you were in the library. The Doctor: So was the swimming pool.

I think training in comedy, as it were, a history writing comedy, is a powerful tool for anyone.

Nothing can ever be a rule in drama, because then you're saying certain things won't ever happen, and that would be very boring.

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.

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.