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

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

The Doctor: It's my nose; it has special powers. Nancy: Yeah? That why it's so...? The Doctor: What? Nancy: Nothing. The Doctor: What? Nancy: Nothing. Do your ears have special powers too?

I'll be a story in your head. But that's OK. We're all stories, in the end. Just make it a good one, eh? Because it was, you know; it was the best.

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

See the bowtie? I wear it and I don't care. That's why it's cool.

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.