Penny: You're a grown man. You should be able to pick whichever Hobbit you want. ... I wish you wouldn't, but one problem at a time.

Raj: If you like dry, factual statement interspersed with awkward silence, it was bananas.

Sheldon: Have you got Leonard a welcome home gift?
Penny: No.
Sheldon: Do you want to go halfsies on a $200 squirt gun?

Sheldon: This (Sailor's Hat) changes nothing. Except the Halloween costume I'm wearing this year. Amy, you're going to be Olive Oyl. Lay off the donuts.

Penny: Hey, Princeton, look at that. Team community college-night school is in the lead!

Leonard: We did them at Princeton, too.
Howard: Oh, that's cute. Like it's a real college.
Sheldon: That's amusing. I was going to say the same about M.I.T., but it works for Princeton, too.

Stuart: So, when you guys plan fun activities, does my name even come up or ...?
Raj: I invited you to my murder mystery party.
Stuart: No, you didn't.
Raj: Oh.

Bernadette: They're here first. This is because you made me slow down for that blind guy.

Howard: Have you ever played a game with Bernadette?
Amy: No.
Howard: Have you ever gone into a steel cage with a wolverine?

Leonard: Okay, we're almost ready to go. Once we bond the wires, we can test the tubes.
Professor Proton: This is so exciting. I feel like I'm seventy-five again.

Raj: *Imitating Howard* My name is Howard. I can make your hair into diamonds. My mom is morbidly obese. Everyone love me.

Sheldon: Well, if you're hoping to get in touch with Bill Nye, I can't help you. I have been informed he is now Bill Nye, the Restraining Order Guy.

Professor Proton: I was thinking if it isn't too much trouble, I'd like to get your opinion about my paper.
Sheldon: Thank you, it would be an honor.
*Professor Proton hands Sheldon his paper*
Sheldon: Actually, I don't need that. I hacked into your email account and read it.
Professor Proton: What did you think?
Sheldon: First, I think the fact you use your birthday as a password is embarrassing.
Professor Proton: Thank you.
Sheldon: Second, I thought your paper was inspired.
Professor Proton: Well that means a lot to me.

Sheldon: Can I invite you in for tea?
Professor Proton: No, I really have to run .
*Penny walks in the room*
Penny: Hey Arthur, how are you?
Professor Proton: Well I guess one cup wouldn't hurt.

Sheldon: How are those nipples feeling, chief?