Reinette: One may tolerate a world of demons for the sake of an angel.

There's one thing you don't put in a trap, if you're smart, if you value your continued existance, if you have any plans about seeing tomorrow, there is one thing you never ever put in a trap. And what would that be sir? Me

You want weapons? We're in a library! Books! The best weapons in the world!

Rule 1: The Doctor lies.

Twins are under-represented in the media. Hamlet - never twins. Hamlet Twins Of Denmark. King And Queen Lear. It would work. Come on, more twins on television.

The Doctor: Oh, now what's this, then? I love this. A big, flashy-lighty thing. That's what brought me here. Big, flashy-lighty things have got me written all over them. Not actually, but give me time... and a crayon.

The Doctor: Don't blink. Don't even blink. Blink and you're dead. Don't turn your back. Don't look away. And don't blink.