VALARIE: You mean out there right now there are families like mine, under threat from terrible things?

DOCTOR: Loads of them, unfortunately

VALARIE: And we can save them?

DOCTOR: We can try. It’s all we can do. And sometimes it’s enough.

VALARIE: Then yeah. I’m in.

DOCTOR: Well then. Welcome aboard, Valarie.

DAN: What's the point of being alive if it's not to make others happy?

MRS BADDELEY: Christmas wouldn't be Christmas without one of the my plum puddings!