Sheldon: How did you get in here?
Penny: What do you mean? Leonard's a member.
Sheldon: You told me it was incredibly exclusive.
Leonard: Y-Yeah, look, about that, I lied.
Penny: Hey, wait, you told me it was exclusive, too.
Leonard: Mm-hmm. I avoided him and impressed you, all with the same lie.
Penny: Damn, Hofstadter, didn't think you had it in you.

Penny: At one point, they had me figure out how to get a banana out of a puzzle box.
Leonard: Wait, Sheldon gave me a banana in a box. He was testing me, too.
Penny: Unbelievable.
Leonard: And how could a chimp even solve that? That was impossible.
Penny: Really? You couldn't get it out?

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Leonard: Uh, so, look, I'm here to ask you to give Sheldon and Amy the Athenaeum for their wedding.
Barry Kripke: (laughs) Why would I do that?
Leonard: Because deep down, Barry, you're a really good guy.
Barry Kripke: But am I?

Leonard: Do you guys have a location yet? 'Cause you don't have a lot of time.
Amy: Hey, it took us nine months to pick a date, and a week to decide if brains can have lips on them, so get in the boat and row.

Sheldon: You know, I'm really happy with our wedding date. The month squared equals the square of the sum of the members of the set of prime factors of the day. Isn't that romantic?
Amy: Yes, it's like that Shakespeare sonnet, "Shall I compare thee to a day that's also a really weird math problem."