“The very powerful and the very stupid have one thing in common. They don’t alter their views to fit the facts, they alter the facts to fit their views. Which can be uncomfortable if you happen to be one of the facts that needs altering.”

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

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

“You know, I am so constantly outwitting the opposition, I tend to forget the delights and satisfaction of the arts, the gentle art of fisticuffs.”

“I say, what a wonderful butler. He's so violent.”

“Sometimes the only choices you have are bad ones. But you still have to choose.”

ROSE: You're assuming "he" as a pronoun?

DOCTOR: True. Yes. Sorry. Good point. Are you he or she or they?

MEEP: My chosen pronoun is the definite article. I am always The Meep.

DOCTOR: Oh. I do that.

RIVER: Does sarcasm help?

DOCTOR: Wouldn't it be a great universe if it did?

“I've given up on that cuppa and opted for a life of abstinence.”

“Well, that’s alright, then!”

“The best thing that you can do is to change gender again.”

DOCTOR: By the time I've called look out, what's your name?

ROMANA: Romanadvoratnelundar.

DOCTOR: By the time I've called that out, you could be dead. I'll call you Romana.

ROMANA: I don't like Romana.

DOCTOR: It's either Romana or Fred.

ROMANA: All right, call me Fred.

DOCTOR: Good. Come on, Romana.

DOCTOR: Do you usually do what I usually do in these circumstances?

DEPUTY: What's that?

DOCTOR: Run!

DOCTOR: Oh. Oh, we're on a baby farm. Ha-ha! A parthenogenesis machine. What is it with you and babies?

RUBY: I was going to say the same thing to you.

DOCTOR: We've gone from baby to baby. I'm not saying things are connected, and yet... things connect.

“But there is one thing that I should warn you about, Ruby, and this is really very serious. With all of my adventures throughout Time and Space, I have to tell you there is always a twist at the end.”

DOCTOR: Oh, and I met a horse.

MICKEY: What's a horse doing on a spaceship?

DOCTOR: Mickey, what's pre-Revolutionary France doing on a spaceship? Get a little perspective.

SUSAN: Oh, pet. Anything to help. I don't mind. I'll make the tea.

IBRAHIM: Did you make this tea?

SUSAN: I did, yes.

IBRAHIM: Don't make the tea.

CARLA: I just need you to look after Mum. It's only going to be for a couple of hours.

FLOOD: Oh, leave her to me. I nursed my old mum through diabetes and a hip operation. She died of an ulcer. But that was when I wasn't looking.

CHERRY: I would love a cup of tea.

FLOOD: Would you, sweetheart? Well, we'd all like a lot of things... that aren't going to happen.

CHERRY: What that supposed to mean?

FLOOD: I'd be very careful, Mrs Sunday. There's a storm coming in. He waits no more.

KATE: But... Okay, the grandchild exists and you've got the TARDIS, but you've never gone back to see her. Why not?

DOCTOR: You've seen my life. I bring disaster, Kate. Disaster. What if I go back and ruin her?

KATE: For what it's worth, I think you bring joy.

KATE: Ruby, this is a gold security establishment. Even the Prime Minister can't walk into UNIT.

MORRIS: Especially the Prime Minister.

“And that's how the story of the Church on Ruby Road comes to an end, with a very happy ending for little Ruby Sunday. But life goes on, doesn't it? Ruthlessly. And what happens, you might wonder. Oh, what happens to that mysterious traveller in Time and Space known as the Doctor? I'm sorry to say his story ends in absolute terror. Night, night.”

ACE: Don't you have things you hate?

DOCTOR: I can't stand burnt toast. I loathe bus stations. Terrible places. Full of lost luggage and lost souls.

ACE: I told you I never wanted to come back here again.

DOCTOR: And then, there's unrequited love, and tyranny, and cruelty.

ACE: Too right.

DOCTOR: We all have a universe of our own terrors to face.

ACE: I face mine on my own terms.

SARAH: Just how big is the TARDIS?

DOCTOR: Well, how big's big? Relative dimensions, you see. No constant.

SARAH: That's not an answer.

DOCTOR: How big are you at the moment?

SARAH: Five four, just, and that's still not an answer.

DOCTOR: Listen, listen. There are no measurements in infinity. You humans have got such limited little minds. I don't know why I like you so much.

SARAH: Because you have such good taste.

DOCTOR: That's true, that's very true.

CASEY: Chains clanking, nine foot tall.

JAGO: You've been drinking.

CASEY: Not a drop, sir.

JAGO: Well, it's time you started.

(Jago holds out his hip flask. Casey takes a long pull.)

“Why can't people be nice to one another, just for a change. I mean, I'm an alien, and you don't want to drag me into a swamp, do you. You do.”

ROMANA: My name is Romanadvoratnelundar.

DOCTOR: I'm so sorry about that. Is there anything we can do?