BARBARA: Vicki, are you going to come with us?

VICKI: Oh I, I'd like to. Yes, if you'll have me.

BARBARA: Look, Ian, all the old associations are still in the ship. You can't expect him to say goodbye to Susan and then forget about her the next minute.

IAN: No, I suppose not. I wonder what she's doing now?

BARBARA: If I know anything about David, she's learning to milk cows.

IAN: What's that nightmare?

DOCTOR: Isn't it sufficient that it's down there and we're up here? Hmm?

IAN: Yes. It's got eyes. I saw them. Green. Used to daylight. Must have come in from the outside.

DOCTOR: Oh. Very good, yes. Very intelligent reasoning. So good I might have said the same thing myself.

IAN: Well, you see Vicki, our space ship, well, isn't like this one. It travels through time.

BARBARA: We left in 1963.

VICKI: 1963! But that means you're about five hundred and fifty years old.

BARBARA: Why, yes, I suppose I am. Yes, it's a way of looking at it, but I'll try not to look at it too often.

VICKI: They didn't have time machines in 1963, they didn't know anything then.

IAN: Oh, we weren't entirely ignorant, young lady. Even the Doctor thought it was worth paying us a visit. That's how we got mixed up with him in the first place.

VICKI: Then Bennett murdered my father. Then I've got nobody.

DOCTOR: My dear. My dear, why don't you come with us, hmm?

VICKI: In that old box?

DOCTOR: We can travel anywhere and everywhere in that old box as you call it. Regardless of space and time.

VICKI: Then it is a time machine?

DOCTOR: And if you like adventure, my dear, I can promise you an abundance of it. Apart from all that, well you'll be amongst friends. Hmm? Well? Now, suppose I leave you here for a moment to think about it, hmm?

DOCTOR: You destroyed a whole planet to save your own skin. You're insane.

BENNETT: The girl didn't know I'd been arrested. When we get back to Earth, she'd support my story. I dressed up as Koquillion to show her how terrible the people here were.

DOCTOR: If that happened, your guilt would have been hidden forever, hmm?

BENNETT: If it happened? Nothing's changed. There's only three more people for Koquillion to kill, that's all.