The Empty Child

DOCTOR: Do you know how long you can knock around space without happening to bump into Earth?

ROSE: Five days? Or is that just when we're out of milk?

DOCTOR: Of all the species in all the Universe and it has to come out of a cow.

“You know, one day, just one day, maybe, I'm going to meet someone who gets the whole ‘don't wander off’ thing. Nine hundred years of phone box travel, it's the only thing left to surprise me.”

“Amazing. 1941. Right now, not very far from here, the German war machine is rolling up the map of Europe. Country after country, falling like dominoes. Nothing can stop it. Nothing. Until one, tiny, damp little island says no. No. Not here. A mouse in front of a lion. You're amazing, the lot of you. Don't know what you do to Hitler, but you frighten the hell out of me. Off you go then do what you've got to do. Save the world.”

DOCTOR: Mister Spock?

ROSE: What was I supposed to say? You don't have a name. Don't you ever get tired of Doctor? Doctor who?

DOCTOR: Nine centuries in, I'm coping.