The Doctor: I've seen bigger. Clara: Really? The Doctor: Are you joking? It's massive!

To me, a 'brand' sounds evil.

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

Time travel is always more magical somehow when you go into the past. Traveling into the future is something you do, every day. You're just not going to get very far. So, I rather like the past travel.

I like that Helen Mirren has been saying the next doctor should be a woman. I would like to go on record and say that the Queen should be played by a man!

If anyone said to me 'invent a new monster so we can sell more toys', I'd kick them out of my office.

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