The universe is big, its vast and complicated, and ridiculous. And sometimes, very rarely, impossible things just happen and we call them miracles. And that's the theory. Nine hundred years, never seen one yet, but this would do me.

I can't see what's wrong about assuming intelligence in your audience and what's bad news about being rewarded for assuming that.

Young Reinette: Monsieur, be careful! The Doctor: It's just a nightmare, Reinette, don't worry, everyone has nightmares. Even monsters under the bed have nightmares! Young Reinette: What do monsters have nightmares about? The Doctor: Me!

You take this cold, remarkable, difficult, dangerous, borderline psychopath man, and you wonder what might have happened to him had he not met his best friend, a friend that no one would have put him with, this solid, dependable, brave, big-hearted war hero. I think people fall in love, not with Sherlock Holmes or Dr. Watson, but with their friendship. I think it is the most famous friendship in fiction, without a doubt.

As we all know, it is the proper duty of every British subject to come to the aid of the TARDIS.

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

It's a fez. I wear a fez now. Fezes are cool.