SARAH: So there's three of you?

ROSE: Three Doctors?

JACK: I can't tell you what I'm thinking right now.

RIVER: Funny thing is, this means you've always known how I was going to die. All the time we've been together, you knew I was coming here. The last time I saw you, the real you, the future you, I mean, you turned up on my doorstep, with a new haircut and a suit. You took me to Darillium to see the Singing Towers. What a night that was. The Towers sang, and you cried.

RIVER: When you run with the Doctor, it feels like it will never end. But however hard you try, you can't run forever. Everybody knows that everybody dies, and nobody knows it like the Doctor. But I do think that all the skies of all the worlds might just turn dark, if he ever, for one moment, accepts it.

DOCTOR: Funny little human brains. How do you get around in those things?

DOCTOR: Relax, he's a fifty first century guy. He's just a bit more flexible when it comes to dancing.

ROSE: How flexible?

DOCTOR: Well, by his time, you lot have spread out across half the galaxy.

ROSE: Meaning?

DOCTOR: So many species, so little time.

ROSE: What, that's what we do when we get out there? That's our mission? We seek new life, and, and-

DOCTOR: Dance.

DOCTOR: Everybody lives, Rose. Just this once, everybody lives!