The 9th Doctor: I'm the Doctor, by the way. What's your name?
Rose Tyler: Rose.
The 9th Doctor: Nice to meet you, Rose. Run for your life!

---

Rose: Really though, Doctor. Tell me. Who are you?
The 9th Doctor: Do you know like we were saying? About the Earth revolving? It's like when you're a kid. The first time they tell you that the Earth's turning and you just can't believe it because everything 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. And the entire planet is hurtling around the sun at 67,000 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.

---

Martha: I traveled across the world, from the ruins of New York to the fusion mills of China. Right across the radiation pits of Europe. And everywhere I went, I saw people just like you, living as slaves. But if Martha Jones became a legend, then that's wrong because my name isn't important. There's someone else. The man who sent me out there, the man who told me to walk the Earth. And his name is the Doctor. He has saved your lives so many times and you never even knew he was there. He never stops, he never stays, he never asks to be thanked. But I've seen him, I know him, I love him. And I know what he can do.

---

Margaret: I spared her life.
The Doctor: You let one of them go but that's nothing new. Every now and then a little victim's spared because she smiled, 'cause he's got freckles. 'Cause they begged. And that's how you live with yourself. That's how you slaughter millions. Because once in awhile—on a whim, if the wind's in the right direction—you happen to be kind.
Margaret: Only a killer would know that.