Sheldon: Suez? Birth? It's a big night for canals.

Sheldon: Just out of curiosity, which one of you figured it out?
Howard: I did.
Sheldon: Impressive. [rubs out Howard's score on the leaderboard]

Stuart: I am really sorry. I will make it up to you. But it won't be with a Val Kilmer Batman figurine (laughing) because some sucker's buying that right now. [to the customer] (laughs) Not you. This is great.

Leonard: Did Sheldon and Amy give you guys that puzzle, too?
Howard: Yeah. Is it just me or have they been acting strange?
Leonard: I don't think they're acting.

Dr. Harris: Amy, I recently read your paper on lesions in the olfactory receptors in the brain. It was inspired.
Amy: Oh, well, I guess it didn't stink. But if it did, that rat wouldn't have known it.

Leonard: Yeah, did Sheldon send it to you?
Penny: Amy did. I solved it already.
Leonard: Really?
Penny: Yeah. Same way I solved my jury duty summons, I threw it away.

Bernadette: If you really want to help, put on a rubber glove, reach on up there and start pulling.
Penny: I know you're joking, but I grew up on a farm. I'll do it.

Howard: Honey, babies don't always come on their due date. Halley was two weeks late. [seeing Bernadette's stare] But this baby's a boy. They don't take as long to get ready.

Bernadette: It's really sweet of you to come by and keep me company.
Sheldon: Agreed.

Sheldon: Maybe we're being old-fashioned, defining these roles by gender. You know, historically, the best man's role was to defend the bride and groom in combat. I mean, if that's not Penny, I don't know what we're doing here.

Leonard: Don't look at me. When the music stopped, you were holding Sheldon.

Sheldon: I also have a pretty cute picture to share.
Howard: What is that?
Sheldon: An equation. Isn't it perfect? Sometimes I just stare at it, and I think "I can't believe that came out of me."

Sheldon: Okay. Here it is. I can control the thermostat in Leonard's apartment with my phone. And when he makes me mad, I turn it up, slightly.

Howard: Oh, hey. I didn't know you were here. What are you two talking about?
Bernadette: Literally, nothing interesting.
Sheldon: [whispering] Oh, you're good.

Bernadette: You know what, maybe we're putting too much pressure on this. It doesn't matter what we name him. He's gonna be amazing.
Howard: You're right. This kid is part you and part me.
Bernadette: Yeah. He's gonna be smart and kind and funny.
Howard: If he cracks five-foot-six, it'll be a miracle.