DOCTOR: Okay. Name - the Doctor. Occupation - not a doctor. Current status - just passing by. Employer - myself. Address - that blue box over there. Now, if you don't mind, I just got snowmanned, and I would like to go home.

DOCTOR: Oh, the blossomiest blossom. That's the only sad thing. I want to know what happens next. Right, then. Doctor Whoever-I'm-about-to-be. Tag, you're it.

VALARIE: Tell me why then. Why did they have to die?

DOCTOR: So they and countless others wouldn’t die in agony later. So that the universe could heal.

VALARIE: Hmmm. If you were a monster, I’d leave. No, that’s a lie - er - I’d try and stop you. But you don’t sound like a monster.

DOCTOR: Thanks very much

VALARIE: Having to make a call like that. To save a universe that sick. Sounds like you’re a doctor.