AMY: One little girl crying. So?

DOCTOR: Crying silently. I mean, children cry because they want attention, because they're hurt or afraid. But when they cry silently, it's because they just can't stop. Any parent knows that.

AMY: Are you a parent?

DOCTOR: Hundreds of parents walking past who spot her and not one of them's asking her what's wrong, which means they already know, and it's something they don't talk about. Secrets. They're not helping her, so it's something they're afraid of. Shadows, whatever they're afraid of, it's nowhere to be seen, which means it's everywhere. Police state.

AMY: But why would I choose to forget?

MANDY: Because everyone does. Everyone chooses the Forget button.

DOCTOR: Did you?

MANDY; I'm not eligible to vote yet. I'm twelve. Any time after you're sixteen, you're allowed to the see the film and make your choice. And then once every five years.

DOCTOR: And once every five years, everyone chooses to forget what they've learned. Democracy in action.

AMY: You look human.

DOCTOR: No, you look Time Lord. We came first.

DOCTOR: Look, three options. One, I let the Star Whale continue in unendurable agony for hundreds more years. Two, I kill everyone on this ship. Three, I murder a beautiful, innocent creature as painlessly as I can. And then I find a new name, because I won't be the Doctor any more.

LIZ: There must be something we can do, some other way.

DOCTOR: Nobody talk to me. Nobody human has anything to say to me today!