DOCTOR: I thought that was non-diegetic.

DOCTOR: It's funny, cos I wonder where the TARDIS goes at random. Maybe it lands on some outcrop by the sea. And there's a tribe and they worship it for 100 years. Then they grow up and try to burn it. Then they get wise. They preserve it. Then they build a city all around it, till the TARDIS is just a tiny little dot, surrounded by skyscrapers and monorails. Time passes and the city falls. It all gets swept away. And there's the TARDIS… still on its outcrop… by the sea. She's the only thing I've got left.

TEGAN: I'm not coming with you.

DOCTOR: I beg your pardon?

TEGAN: I'm tired of it.

DOCTOR: What's the matter?

TEGAN: A lot of good people have died today. I think I'm sick of it.

DOCTOR: You think I wanted it this way?

TEGAN: No. It's just that I don't think I can go on.

DOCTOR: You want to stay on Earth.

TEGAN: My Aunt Vanessa said, when I became an air stewardess, if you stop enjoying it, give it up.

DOCTOR: Tegan

TEGAN: It's stopped being fun, Doctor. Goodbye. Turlough.

NARRATOR: Through the ruin of a city stalked the ruin of a man.

DOCTOR: But I don't exist in your world!

LETHBRIDGE-STEWART: Then you won't feel the bullets when we shoot you.

DOCTOR: Are you happy with us, Victoria?

VICTORIA: Yes, I am. At least, I would be if my father were here.

DOCTOR: Yes, I know, I know.

VICTORIA: I wonder what he would have thought if he could see me now.

DOCTOR: You miss him very much, don't you?

VICTORIA: It's only when I close my eyes. I can still see him standing there, before those horrible Dalek creatures came to the house. He was a very kind man, I shall never forget him. Never.

DOCTOR: No, of course you won't. But, you know, the memory of him won't always be a sad one.

VICTORIA: I think it will. You can't understand, being so ancient.

DOCTOR: Eh?

VICTORIA: I mean old.

DOCTOR: Oh.

VICTORIA: You probably can't remember your family.

DOCTOR: Oh yes, I can when I want to. And that's the point, really. I have to really want to, to bring them back in front of my eyes. The rest of the time they sleep in my mind, and I forget. And so will you. Oh yes, you will. You'll find there's so much else to think about. So remember, 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. You must get some sleep and let this poor old man stay awake.

DOCTOR: 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.

DOCTOR: I don’t make threats, but I do keep promises.

DOCTOR: If you could touch the alien sand and hear the cries of strange birds and watch them wheel in another sky, would that satisfy you?

DOCTOR: Fear makes companions of all of us.