Well we've moved through the funfair a bit – we've done the rollercoaster, now we're on the ghost train.

I always tend to favor the newer idea.

Brainy's the new sexy.

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.

You'll go out of business if you think people are stupid.

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

There’s this issue you’re not allowed to discuss: that women are needy. Men can go for longer, more happily, without women. That’s the truth. We don’t, as little boys, play at being married - we try to avoid it for as long as possible. Meanwhile women are out there hunting for husbands.