KATE: My father, he'd tell me stories about you when I was a kid. He'd sit there in the firelight, telling tales of the Doctor, his eyes... shining. But he never, ever mentioned a granddaughter.

DOCTOR: I was a different Doctor back then, Kate. Great enigma. Still can't shake it off. I'm trying.

KATE: If you've got a granddaughter, that means you've got kids!

DOCTOR: Well, not quite. Not yet.

KATE: But... You mean... you can have a granddaughter before a daughter?

DOCTOR: Life of a Time Lord.