[posing as a teacher, introducing himself to class] So, physics! Physics, eh? Physics! Phyyyysics! [catches himself] I hope you're getting all this down!
“School Reunion”
In this episode: Tenth Doctor (4), Sarah Jane Smith (3), Rose Tyler (2)
[Sarah encounters that TARDIS and backs into the school auditorium. She turns and sees the Doctor.]
Hello, Sarah Jane.
[softly] It's you. Doctor. Oh, my God, it's you, isn't it? [realizing] You've regenerated.
Oh. Half a dozen times since we last met.
You look.... incredible.
So do you.
Hm. I got old. What are you doing here?
Well. UFO sighting. School gets record results. I couldn't resist. What about you?
Same.
[They both smile and laugh -- two old friends. Sarah then gets upset.]
[emotional] I thought you died. I waited for you. You didn't come back, and I thought you must have died.
I lived. Everyone else died.
What do you mean?
Everyone died, Sarah.
I can't believe it's you.
[They hear Mickey cry out.]
[her mood brightens] Okay. Now I can.
I don't age. I regenerate. But humans decay; you wither and you die. Imagine watching that happen to someone that you-- [breaks off]
RRose
What, Doctor?
You can spend the rest of your life with me, but I can't spend the rest of mine with you. I have to live on. Alone. That's the curse of the Time Lords.
I saw things you wouldn't believe!
RRose
Try me.
Mummies.
RRose
I've met ghosts.
Robots. Lots of robots.
RRose
Slitheen. In Downing Street.
Daleks!
RRose
[smugly] Met the Emperor.
Anti-matter monsters!
RRose
Gas-mask zombies!
Real-living dinosaurs!
RRose
Real-living werewolf!
THE...LOCH NESS...MONSTER!
RRose
[stunned] Seriously?
It's daft, but I haven't ever thanked you for that time, and like I said, I wouldn't have missed it for the world.
Something to tell the grandkids.
Oh, I think it'll be someone else's grandkids now.
Right. Yes, sorry. I didn't get a chance to ask. You haven't... There hasn't been anyone? You know...?
Well, there was this one guy. I traveled with him for a while. But he was a tough act to follow. [Sarah and the Doctor laugh] Goodbye, Doctor.
Oh, it's not goodbye—
Say it, please. This time. Say it.
Goodbye... my Sarah Jane!
These quotes come from Wikiquote's Doctor Who pages and are available under the Creative Commons Attribution-ShareAlike License.