Jack Harkness (about a soldier): Trust me, you're not his type. I'll distract him. Don't wait up.
Doctor: Relax. He's a 51st century guy. He's just a bit more flexible when it comes to dancing.
Rose Tyler: How flexible?
Doctor: By his time, you lot are spread out across half the galaxy.
Rose Tyler: Meaning?
Doctor: So many species, so little time.
Rose Tyler: What, that's what we do when we get out there? That's our mission? We seek new life and... and...
Doctor: Dance.