Rose: Look at you, beaming away like you're Father Christmas! The Doctor: Who says I'm not, red-bicycle-when-you-were-twelve? Rose: [shocked] What? The Doctor: And everybody lives, Rose! Everybody lives! I need more days like this! Go on, ask me anything; I'm on fire!

There's something really cool about scaring children. Traumatize a generation, that's what it's all about.

Rose: 'If you are an alien, how come you sound like you're from the north?' Doctor: 'Lots of planets have a north!

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.

Madge: I don't know why I keep shouting at them. The Doctor: Because every time you see them happy you remember how sad they're going to be. And it breaks your heart. Because what's the point in them being happy now if they're going to be sad later. The answer is, of course, because they are going to be sad later. ~ The Doctor, the Widow, and the Wardrobe

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.