Bill Nye: What are you guys working on?
Leonard: We're making nano-vacuum tubes.
Bill Nye: Interesting.
Professor Proton: Haven't you stolen enough from? Back off bow-tie!

Leonard: Oh, gees.
Professor Proton: Another photo from Sheldon?
Leonard: No, I have to go pick him up. Bill Nye ditched him at the smoothie place.
Professor Proton: He probably stole his wallet too.

Sheldon: Arthur, I'm surprised to see your here.
Professor Proton: Yeah, me too. Somewhere around the third floor I began to see a white light.

Sheldon: Look at Arthur cracking up at a joke I made. I'll never hear that joke again.
Arthur: You never heard it that time.

Professor Proton: Sheldon, in a couple of hours I have to get up, pee and then wander around the house.