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.

(Inside the TARDIS)

VALARIE: How does she work?

DOCTOR: Big bit fits inside the small bit. It’s like an optical illusion except with dimensions and not an illusion, so nothing like an optical illusion I suppose.

HENDRICKS: If you kill me Doctor, then I’ll ensure that you die as well.

DOCTOR: Go on then. Try.

HENDRICKS: I’ll pay every bounty Hunter - every mercenary, find everyone that hates you. Wherever that box of yours arrives, someone will be there waiting to kill you!

DOCTOR: I look forward to it. Daleks, Cybermen, mad Gods, whatever you can arrange. I’ll beat them all. And you’ll still be dead.

HENDRICKS: You can’t know that!

DOCTOR: I can. Because I’ve fought every abomination in the universe. And the only thing that’s ever stopped me is my conscience!

HENDRICKS: And is that conscience willing to have my death weighing on it? Mine and everyone else on this planet.

DOCTOR: I destroyed my home world! I’m haunted every day by the millions I had to sacrifice! I can cope with a few more. Question is, are you ready to join them?