The Doctor: What will you do with yourself now?
Donna: Not getting married for starters. And I'm not gonna temp any more. I dunno. Travel? See a bit more of planet Earth. Walk in the dust. Just… go out there and do something.
The Doctor: Well, you could always…
The Doctor: Come with me.
Donna: (after a pause) No.
The Doctor: OK.
Donna: I can't.
The Doctor: No, that's fine.
Donna: No, but really, I… I mean, everything we did today. Do you live your life like that?
The Doctor: Not all the time.
Donna: I think you do. And I couldn't.
The Doctor: You've seen it out there. It's beautiful.
Donna: And it's terrible. That place was flooding and burning and they were dying and you stood there like… I don't know, a stranger. And then you made it snow. I mean, you scare me to death.