ANYA: But… what if…

DOCTOR: Ah, you can’t torture yourself with the what-ifs. They’ll eat you from the inside out if you let them.

ANYA: The what-ifs. Yes, I’ve been woken up by those in the night more than once. Sound like you have too.

DOCTOR: Oh yeah.

ANYA: Have you lost people you’ve travelled with before?

DOCTOR: I don’t like to talk about it.