DOCTOR: Yes, it all started out as a mild curiosity in a junkyard, and now it's turned out to be quite a, quite a great spirit of adventure, don't you think?

IAN: Yes. We've had some pretty rough times and even that doesn't stop us. It's a wonderful thing, this ship of yours, Doctor. Taken us back to prehistoric times, the Daleks.

SUSAN: Marco Polo, Marinus.

BARBARA: And the Aztecs.

DOCTOR: Yes, and that extraordinary quarrel I had with that English king, Henry the Eighth. You know, he threw a parson's nose at me.

BARBARA: What did you do?

DOCTOR: Threw it back, of course. Take them to the Tower, he said. That's why I did it.

BARBARA: Why?

SUSAN: The TARDIS was inside the Tower.

DOCTOR: Well, I can assure you, my dear Barbara, Napoleon would never have believed you.

IAN: Yes, Doctor, but supposing we had written Napoleon a letter, telling him, you know, some of the things that were going to happen to him.

SUSAN: It wouldn't have made any difference, Ian. He'd have forgotten it, or lost it, or thought it was written by a maniac.

BARBARA: I suppose if we'd tried to kill him with a gun, the bullet would have missed him.

DOCTOR: Well, it's hardly fair to speculate, is it? No, I'm afraid you belittle things. Our lives are important, at least to us. But as we see, so we learn.

IAN: And what are we going to see and learn next, Doctor?

DOCTOR: Well, unlike the old adage, my boy, our destiny is in the stars, so let's go and search for it.

RAMO: Why should I trust you?

DOCTOR: That's a very good question. I wish I could think of a good answer.

PELADON: Greetings, Princess. I'm sorry to hear that your journey ended so uncomfortably.

JO: The whole affair was most deplorable. The pilot was exceedingly inefficient.

THALIRA: Ambassador, we take it that these aliens are known to you?

ALPHA: Er, not the er, female? Not the female, your Majesty. Still, she's of no importance. But this is most certainly the Doctor. A good friend of your father, and of Peladon.

EVELYN: We’re on the Galápagos Islands! And that is a Galápagos tortoise!

DOCTOR: Well actually, Galápagos is a Spanish word for tortoise.

EVELYN: Oh?

DOCTOR: They named the islands after them, you see. The Tortoise Islands, which I suppose means that that is, in fact, a tortoise tortoise! And that’s something else I’ve tort-oise.

BERNICE: You know about me and the...oh goddess, you know him?

IRIS: Know him? I've had him! He's my fancy man.

(To Tu, a bovine-like alien)

ANGELO: Pull the other one. It's got teats on.