DOCTOR: I'm the Doctor.

MABLI: A doctor of medicine?

DOCTOR: Well, medicine, science, engineering, candyfloss, LEGO, philosophy, music, problems, people, hope. Mostly hope.

“Two hearts. One happy, one sad.”

“A bottle? Floating in the middle of deep space. It's a milk bottle. Right. Well, I've clearly got a very determined milkman!”

TENTH DOCTOR: We must stop meeting like this.

FIFTH DOCTOR: (chuckles) No, we really must, I mean, it could literally tear the fabric of reality apart.

TENTH DOCTOR: Yes.

FIFTH DOCTOR: So we shouldn't.

TENTH DOCTOR: No.

FIFTH DOCTOR: Fun, though. At times.

TENTH DOCTOR: Yes. Yes, it was!

“The mediator between the head and the hands must be the heart. If only.”

“Great men are forged in fire. It is the privilege of lesser men to light the flame, whatever the cost.”

MOMENT: You know the sound the TARDIS makes? That wheezing, groaning. That sound brings hope wherever it goes.

WAR DOCTOR: Yes. Yes, I like to think it does.

MOMENT: To anyone who hears it, Doctor. Anyone, however lost... Even you.

“Oh yes, of course. I suppose it makes sense. Wearing a bit thin. I hope the ears are a bit less conspicuous this time.”

ELEVENTH DOCTOR: I never forget a face.

CURATOR: I know you don't. And in years to come, you might find yourself revisiting a few. But just the old favourites, eh?

CURATOR: Oh, it's entirely up to you. Your choice, eh? I can only tell you what I would do if I were you. Oh, if I were you. Oh, perhaps I was you, of course. Or perhaps you are me. Congratulations.

ELEVENTH DOCTOR: Thank you very much.

CURATOR: Or perhaps it doesn't matter either way. Who knows, eh? Who knows?

“Come on, please. Give us this. It's all right, it's me! Stabilise. Come to Daddy. I mean Mummy.”

(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.

DOCTOR: The King's just died. How very convenient.

TURLOUGH: Not for him.

“You’re right. Could be extremely dangerous. Unconscionably dangerous. So dangerous I haven’t thought of a word for it yet. I’d better go first!”

ACE: But when?

DOCTOR: Are you looking for the butterfly?

ACE: What the one who beats its wings and tips the balance, so the hurricane forms? There isn't one, is there?

DOCTOR: Not often. They just tell the butterflies that to keep them happy.

ACE: I should have known.

DOCTOR: No, mostly they break the butterfly on the wheel of time. But over the decades, the millions of butterflies, the weather still changes somehow. That's time. A million, multi-coloured pieces of time.

“This is ridiculous! How can you go from plenty of time to running out of time in no time at all?”

JOEL: Also I might have invented the sandwich.

DOCTOR: No, you can't have.

JOEL: Why?

DOCTOR: Because I invented the sandwich.