DOCTOR: I'm not running away. But this is one corner of one country in one continent on one planet that's a corner of a galaxy that's a corner of a universe that is forever growing and shrinking and creating and destroying and never remaining the same for a single millisecond. And there is so much, so much to see, Amy. Because it goes so fast. I'm not running away from things, I am running to them before they flare and fade forever. And it's all right. Our lives won't run the same. They can't. One day, soon maybe, you'll stop. I've known for a while.

(Rory is marched in at gunpoint by UNIT soldiers)

RORY: There are soldiers all over my house, and I'm in my pants!

AMY: My whole life I've dreamed of saying that, and I miss it by being someone else.

BRIAN: Actually, it’s you they can’t give up, Doctor. And I don’t think they should. Go with him. Go save every world you can find. Who else has that chance? Life will still be here.

DOCTOR: You could come, Brian.

BRIAN: Somebody’s got to water the plants.

RORY: Doctor? Hi. Er, the cube in there, it just opened.

AMY: The cube upstairs just spiked me and took my pulse!

DOCTOR [Delightedly]: Ha! Really? Mine fired laser bolts and now it's surfing the net.

(Brian enters.)

BRIAN: You're never going to believe this. My cube just moved. It rattled.

(The Doctor enters the TARDIS, where Brian is sat on a chair, watching a cube.)

DOCTOR: Brian, you’re still here.

BRIAN: You told me to watch the cubes.

DOCTOR: Four days ago.

BRIAN: Ah! Doesn’t time fly when you’re alone with your thoughts?

RORY: Where’s the Doctor?

AMY: On the Wii again.