DOCTOR: Hello, Sarah Jane.

SARAH JANE: [softly] It's you. Doctor. Oh, my God, it's you, isn't it? [realizing] You've regenerated.

DOCTOR: Oh. Half a dozen times since we last met.

SARAH JANE: You look.... incredible.

DOCTOR: So do you.

SARAH JANE: Hm. I got old. What are you doing here?

DOCTOR: Well. UFO sighting. School gets record results. I couldn't resist. What about you?

SARAH JANE: Same.