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.