River: What face?
The Doctor: The "he’s hot when he’s clever" face.
River: This is my normal face.
The Doctor: Yes, it is.
River: Oh, shut up.
The Doctor: Not a chance.
The Doctor: Be careful!
River: Careful. Tried that once. Ever so dull.
The Doctor: Shout if you get in trouble.
River: (Climbing into a tunnel.) Don’t worry. I’m quite the screamer. Now there’s a spoiler for you!
The Doctor: Oh, this is my friend River. Nice hair, clever, and has her own gun. And unlike me, she really doesn't mind shooting people. I shouldn't like that. Kinda do, a bit.
River Song: Thank you, sweetie.
The Doctor: I know you're team players and everything, but she'll definitely kill the first three of you.
River: Oh, the first seven, easy.
The Doctor: Seven, really?
River: Oh, eight for you, honey.
The Doctor: Stop it!
River: Make me!
The Doctor: Oh, maybe I will!
River: Those reports of the sunspots and the solar flares, they're wrong. It's not the Sun, it's you. The sky is full of a million million voices saying, "Yes, of course we'll help." You've touched so many lives, saved so many people, did you think when your time came you'd really have to do more than just ask? You've decided that the universe is better off without you. But the universe doesn't agree.
The Doctor: River, no one can help me. A fixed point has been altered. Time is disintegrating.
River: I can't let you die!
The Doctor: I have to die!
River: Shut up! I can't let you die — without knowing you are loved — by so many, and so much — and no one more than me.
The Doctor: River, you and I know what this means. We are Ground Zero of an explosion that will engulf all reality. Billions on billions will suffer and die.
River: I'll suffer, if I have to kill you.
The Doctor: More than every living thing in the universe?
River: Yes.