DALEK 1: Orders received. Exterminate all humans.

DALEK 2: Exterminate all humans.

DALEK 1: Exterminate! Annihilate! Destroy! Daleks conquer and destroy!

ALL: Daleks conquer and destroy! Daleks conquer and destroy!

JO: I don't believe it! It's bigger inside than out.

DOCTOR: Yes. That's because the TARDIS is dimensionally transcendental.

JO: What does that mean?

DOCTOR: It means that it's bigger inside than out.

DOCTOR: (drawing a diagram) ...And it comes out here. Right?

OSGOOD: Right. I think.

DOCTOR: Good grief, man, it's as simple as Einstein's special theory of relativity!

BRIGADIER: We'll manage, Doctor.

DOCTOR: Good. When you get that thing finished, bring it through the barrier and down to the village at once, all right? (He drives off.)

BRIGADIER: You know, Sergeant, I sometimes wish I worked in a bank.

MISS HAWTHORNE: (pouring tea) You must learn the art of waiting, Sergeant. The Doctor will come, or else he won't, and that's all that can be said. Now, milk or lemon?

SECOND DOCTOR: If only I could find my recorder, I could play you a little something to pass the time.

BRIGADIER: We must be thankful for small mercies.

JO: We’re still on Earth, aren’t we?

DOCTOR: No, that’s impossible.

JO: Don’t you ever admit that you’re wrong?

DOCTOR: No, that’s impossible too.

MASTER: I'd like to try and take the Doctor alive, if possible. If not, I'll blast him out of space! Pity, though.

OGRON: You do not wish to kill him?

MASTER: Of course I do! But I don't know... Rocket fire at long range, I don't know, somehow it lacks that personal touch.

MASTER: That must be them. No other ship would be on a course for Earth at a time like this.

OGRON: We are on a course for Earth!

MASTER: Well, naturally, because we're chasing them!

DOCTOR: When I left the psionic beam with you, Brigadier, I said it was only to be used in an emergency!

BRIGADIER: This is an emergency.

DOCTOR: Oil, an emergency?! Ha! It's about time the people who run this planet of yours realise that to be dependent upon a mineral slime just doesn't make sense.

DOCTOR: Don't ask me to explain the organic structure of these creatures.

SARAH: Why not?!

DOCTOR: Because I haven't a clue.

SARAH: So what was going on back there in the temple?

DOCTOR: Sub-thermal recombination of ionised plasma.

SARAH: Oh, simple. I should have thought of that.

DOCTOR: I had a feeling that Neeva was actually expecting to hear an answer to his prayer.

LEELA: There wouldn't be much point in praying if he didn't.

DOCTOR: I could quote you a few theologians who'd give you an argument on that.

LEELA: One day he'll get so cunning even he won't know what he's planned.

LEELA: You mean you can't control this machine?

DOCTOR: Well, of course I can control it! Nine times out of ten. Well, seven times out of ten. Five times— look, never mind, let's see where we are.

UVANOV: I suppose it's also a coincidence that as soon as you two arrive, three of our people are killed? (pause) Well?

DOCTOR: Oh, sorry, I thought it was a rhetorical... well, yes, it's just a coincidence.

GARRON: I admit I had a great struggle with me conscience. Fortunately, I won!

UNSTOFFE: Money isn't everything, Garron.

GARRON: Well, who wants everything? I'll settle for 90 per cent!

DOCTOR: Romana?

ROMANA: Yes?

DOCTOR: You know, I think something very funny's going on. Do you remember that man who was following us? Well, he's standing behind me, poking a gun in my back.

DOCTOR: Clever jink that, don't you think? I made them think I was trying to get to the TARDIS.

PARSONS: What were you trying to do?

DOCTOR: Get to the TARDIS.

DOCTOR: Open! Open!

PERI: Sesame.

DOCTOR: Be careful.

PERI: I think I'd find it very difficult to be casual at this particular moment.

GRANT: No gun. You must be feeling confident.

DOCTOR: Never carry one; causes my pockets to bulge. Ruins the cut of my coat.

RANI: That planet you're so obsessed with – Earth – I shall return to the Cretaceous Age.

MEL: The Cretaceous Age?

RANI: The potential of the dinosaurs was never fully realised.

DOCTOR: That means Shakespeare, Michelangelo, Louis Pasteur, Elvis – even Mrs Malaprop will never have existed!