[The Doctor, Capt. Jack and Rose are cornered by the empty children.]
The Doctor: Go to your room. Go to your room! I mean it. I'm very, very angry with you. I'm very, very cross! Go to your room! [The children lurch away.] I'm really glad that worked. Those would have been terrible last words.
Emperor Dalek: Explain yourself.
The Doctor: I said no.
Emperor Dalek: What is the meaning of this negative?
The Doctor: It means no!
Emperor Dalek: But she will be destroyed!
The Doctor: No! 'Cause this is what I'm gonna do - I'm gonna rescue her! I'm gonna save Rose Tyler from the middle of the Dalek fleet, and then I'm gonna save the Earth, and then - just to finish you off - I'm gonna wipe every last stinking Dalek out of the sky!
Emperor Dalek: But you have no weapons, no defences, no plan!
The Doctor: Yeah, and doesn't that scare you to death?
Rose: But, it's like...think about it, though. Christmas. 1860. Happens once. Just once, and it's gone. It's finished. It'll never happen again. Except for you. You can go back and see days that are dead and gone and a hundred thousand sunsets ago. No wonder you never stay still.
Rose: What's the emergency?
The Doctor: It's mauve.
The Doctor: The universally recognized colour for danger.
Rose: What happened to red?
The Doctor: That's just humans. By everyone else's standards, red's camp. Oh, the misunderstandings. All those red alerts, all that dancing.
Rose: Really though, Doctor, tell me, who are you?
The Doctor: Do you know, like we were saying, about the Earth revolving? It's like when you were a kid, the first time they tell you that the world's turning and you just can't quite believe it because it looks like it's standing still. I can feel it. The turn of the Earth. The ground beneath our feet is spinning at a thousand miles an hour, the entire planet is hurtling around the sun at sixty-seven thousand miles an hour, and I can feel it. We're falling through space, you and me, clinging to the skin of this tiny little world, and if we let go... That's who I am. Now forget me, Rose Tyler. Go home.