SARAH JANE: Doctor, you're being childish.

DOCTOR: Well of course I am. There's no point in being grown up if you can't be childish sometimes.

“There's always something to look at if you open your eyes.”

“Courage isn’t just a matter of not being frightened, you know. It’s being afraid and doing what you have to do anyway.”

“Every great decision creates ripples, like a huge boulder dropped in a lake. The ripples merge and rebound off the banks in unforeseeable ways. The heavier the decision, the larger the waves, the more uncertain the consequences.”

“A straight line may be the shortest distance between two points, but it is by no means the most interesting.”

“You can always judge a man by the quality of his enemies.”

“Small though it is, the human brain can be quite effective when working at full efficiency.”

“I love humans. Always seeing patterns in things that aren’t there.”

“What is the one thing evil can not face—not ever? Itself.”

“Answers are easy. It’s asking the right questions which is hard.”

“Planets come and go. Stars perish. Matter disperses, coalesces, forms into other patterns, other worlds. Nothing can be eternal.”

“Our lives are different to anybody else’s. That’s the exciting thing. There’s nobody in the universe can do what we’re doing.”

“I had to face my fear… That was more important than just going on living.”

“To the rational mind, nothing is inexplicable; only unexplained.”

“You know how it is; you put things off for a day and next thing you know, it’s a hundred years later.”

“An unintelligent enemy is far less dangerous than an intelligent one, Jamie. Just act stupid. Do you think you can manage that?”

“I don’t make threats, but I do keep promises.”

MASTER: If we do cooperate, there'll be no question of you ever returning to Gallifrey.

DOCTOR: If we don't cooperate, there'll be no question of Gallifrey.

“Hello, I'm the Doctor! I believe you want to kill me.”

“But the final responsibility is mine, and mine alone. Listen, if someone who knew the future pointed out a child to you and told you that that child would grow up totally evil, to be a ruthless dictator who would destroy millions of lives, could you then kill that child?”

“Just touch these two strands together and the Daleks are finished. Have I that right?”

“There are worlds out there where the sky is burning, where the sea's asleep, and the rivers dream. People made of smoke, and cities made of song. Somewhere there's danger, somewhere there's injustice, and somewhere else the tea's getting cold. Come on, Ace, we've got work to do!”

ACE: Master? Who's he?

DOCTOR: An evil genius. One of my oldest and deadliest of enemies.

ACE: Do you know any nice people? You know, ordinary people, not power-crazed nutters trying to take over the galaxy?

“The point of archaeology is to carefully recover the past, not disintegrate it.”

KARI: Why won't it move?

DOCTOR: It's controlled by the computer, and the computer's uncontrollable.

PERI: Do you think this wise, Doctor?

DOCTOR: My dear girl, if I stopped to question the wisdom of my actions, I'd never have left Gallifrey.

PERI: Sometimes I wish you hadn't.

“It's the end. But the moment has been prepared for.”

MASTER: I know this is going to be hard to believe, Doctor, but for once I mean you no harm.

DOCTOR: Like Alice, I try to believe three impossible things before breakfast. Go on.

PERI: I only hope it believes you.

DOCTOR: Well, if it doesn't, I shall beat it into submission with my charm.

DOCTOR: I feel disorientated.

SARAH JANE: This is the Disorientation Centre.

DOCTOR: That makes sense.

PERI: I'm not totally ignorant. What is the noun for a collection of geniuses? A bevy?

DOCTOR: An inspiration of geniuses? I don't know.

BRIGADIER: A few months ago, the superpowers, Russia, America and China, decided upon a plan to ensure peace. All three powers have hidden atomic missile sites. All three agreed to give details of those sites plus full operational instructions to another neutral country. In the event of trouble, that country could publish everyone's secrets and so cool things down. Well, naturally enough, the only country that could be trusted with such a role was Great Britain.

DOCTOR: Well, naturally, I mean, the rest were all foreigners.

TENTH DOCTOR: What? What?

SIXTH DOCTOR: What are you afraid will happen if you pause for breath?

TENTH DOCTOR: That there won't be another.

SIXTH DOCTOR: Angel to the left of us, angel to the right

TENTH DOCTOR: Here I am, stuck in the middle with you

“I've seen entire species destroyed, civilisations left in ruins. I've witnessed solar systems vanish in the twinkling of an eye. I've seen things that would freeze your blood. So don't threaten me, don't ever threaten me.”

“I'm a doctor. But probably not the one you're expecting.”

OHILA: We restored you to life, but it's a temporary measure. You have a little under four minutes.

DOCTOR: Four minutes? That's ages. What if I get bored? I need a television, couple of books, anyone for chess? Bring me knitting.

“Charley, C'Rizz, Lucie, Tamsin, Molly. Friends, companions I've known, I salute you. And Cass, I apologise. Physician, heal thyself.”

“Change, my dear. And it seems not a moment too soon.”

“But it was a childish dream that made you a doctor! You dreamt you could hold back death. Isn't that true? Don't be sad, Grace. You'll do great things.”

“You feel that pounding in your heart? That tightness in the pit of your stomach? The blood rushing to your head, do you know what that is? That's adventure. The thrill and the fear, and the joy of stepping into the unknown. That's why we're all here, and that's why we're alive!”

“Lucie, there's a lot of darkness out there. Some of it where Orbis used to be. But you know something? We wouldn't notice any of it if it weren't for all those little pinpricks of light; planets and stars. And that's where I go whenever I feel sad. The next bit of light in the darkness. Keep on moving. Never look back. Well, hardly ever.”

“I was once a man with a masterplan. I’d seek out injustices, topple governments, all in the name of the greater good. I’d started doing the maths, you see…. This is how evil starts, with the belief that the ends justify the means. But once you start down that road, there’s no turning back. What if you can save a million lives, but you have to let ten people die, or a hundred, or a hundred thousand. Where do you stop?”

“I've seen worlds destroyed, civilisations choked in their cradles, whole races fleeing in terror. I've seen centuries of art, of science, wiped out in an instant. I just saw a beautiful rainforest burn along with every creature in it. I didn't even know the planet's name! If you're prepared to accept that much collateral damage to the rest of the universe, then what exactly are you fighting for? I'll protect those with no choice in the matter, no voice.”

“I don't suppose there's any need for a Doctor, anymore. Make me a warrior, now.”

ELEVENTH DOCTOR: Okay. Gentlemen, we're ready. Geronimo!

TENTH DOCTOR: Allons-y!

WAR DOCTOR: Oh, for God's sake. Gallifrey stands!

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

“Believe me, you do not want to make an enemy of humanity. I’ve faced monsters in my time - Daleks, Cybermen, Sontarans - all masters at war in their own way but nothing scares me quite so much as human beings’ capacity for vengeance.”

MASTER: The title you chose: Doctor. Now, it’s not just a man of healing. It means “teacher”. It means “tutor”. Whereas I am a Master. We both want to change the universe, to make it better, it’s only the scale of our ambition separates us.

DOCTOR: What are you saying? You’d like to have been a Doctor but you didn’t have the patients?

“Sometimes the best way to fight a fire is to make sure it doesn’t get started. I’m taking away your matches.”

LIV: I’ll stay, you know. As long as you need me

DOCTOR: We all need someone. That’s what hope is. Other people.