DOCTOR: I love biographies.

DONNA: Yeah, very you. Always a death at the end.

DOCTOR: You need a good death. Without death, there'd only be comedies. Dying gives us size.

DOCTOR: I never land on Sundays. Sundays are boring.

DOCTOR: Oh, I'm thick! Look at me, I'm old and thick. Head's too full of stuff. I need a bigger head.

RIVER: Got a problem with archaeologists?

DOCTOR: I'm a time traveller. I point and laugh at archaeologists.

RIVER: Ah. Professor River Song, archaeologist.

DOCTOR: Almost every species in the universe has an irrational fear of the dark. But they're wrong, because it's not irrational. It's Vashta Nerada.

RIVER: Sorry, you're not allowed to see inside the book. It's against the rules.

DOCTOR: What rules?

RIVER: Your rules.

RIVER: He hasn't met me yet. I sent him a message, but it went wrong. It arrived too early. This is the Doctor in the days before he knew me. And he looks at me, he looks right through me and it shouldn't kill me, but it does.