[Her diary is almost full] The man who gave me this was the sort of man who knew exactly how long a diary you were going to need.

River Song

[on how she knew a spaceship was going to crash] I'm an archaeologist from the future. I dug you up!

River

And they lived happily ever after.

Closing Title Card

Poetry, physics, the same thing.

The Doctor

Time. Time doesn’t pass. Time is an illusion. And Life is the magician. Because Life only lets you see one day at a time. You remember being alive yesterday, you hope you’re going to be alive tomorrow, so it feels like you are traveling one to the other, but nobody’s moving anywhere! Movies don’t really move. They’re just pictures, just lots and lots of pictures, all of them still. None of them moving, just frozen moments!

The Doctor

Time is a structure relative to ourselves. Time is the space made by our lives, where we stand together forever. Time and relative dimension in space. It means life.

The Doctor

I know you know lots of stuff about… well, basically everything, but… do you know any sci-fi?

Bill

The Doctor: Hello, Bill. What’s that?
Bill: I’ll tell you what it *isn’t* -- a freak optical effect! And it’s following me!

Bill: What good’s getting in a box gonna do?!
The Doctor: What an extraordinarily long and involved answer this is gonna be!

Bill: It’s like a…
The Doctor: Spaceship!
Bill: Kitchen!
The Doctor [taken aback]: ...A what?
Bill: A really posh kitchen!

The Doctor: This is the gateway to everything that ever was and ever can be.
Bill: ...Can I use the toilet?

Nardole [about the TARDIS]: First, you have to imagine a very big box fitting inside a very small box.
Bill: Okay!
Nardole: Then, you have to *make* one! [beat] It’s the second part people normally get stuck on.