Raj: I had three model rockets as a kid, and that was the largest space program in India.

Sheldon: You have a replica Saturn V?
Howard: Yeah. My dad bought it before he, you know, abandoned our family.
Sheldon: Lucky duck.

Leonard: Come on. You can build things. You were an astronaut.
Howard: That's true. You know, as a kid, I used to make model rockets. That'd be pretty cool to do with a son.
Sheldon: Model rockets. Finally, something interesting! What is your preferred mode of recovery?
Amy: Sheldon, we're helping our friends.
Sheldon: And we got to model rockets, yeah? It was a tedious road, but well worth the effort.
Amy: So, have you thought of any names?
Sheldon: Amy, we finally got to model rockets. Why are you turning back?

Bernadette: Howie, there's a lot of amazing things you can teach a son.
Raj: Yeah. You do always know how to pick just the right antacid.
Howard: I don't know if I can teach that. It's just something I was born with.

Howard: It feels like it wasn't that long ago we were here doing this for Halley.
Bernadette: 'Cause it wasn't. Which reminds me, before we leave, let's get you a vasectomy.
Howard: Oh, that's sweet, but today is all about you.

Amy: Don't you want a little version of Howard?
Bernadette: I already have a little version of Howard.

Howard: Now I'm having a son? I'll have to teach him how to play sports, and-and watch sports and-and-and-and-and-and--
Raj: He just ran out of man things. He's in trouble.

Leonard: It's okay. We're all here to help.
Sheldon: Yes. And this baby will have plenty of manly role models. Now, I'm certain that whatever Bernadette can't teach him, Penny can.
Leonard: Uh, she can pee into a bottle.
Penny: Mm-hmm. Anything with a neck wider than a nickel.

Raj: So Ruchi and I decided to keep things casual.
Penny: (scoffs)
Raj: What? What? I can handle casual.
Penny: (scoffs)
Raj: Oh, why do you keep doing that with your face?
Penny: Because you keep saying stupid things with yours.

Ruchi: This place seems nice.
Raj: Uh, but not too nice. Yelp called it "good for groups."

Penny: Okay, this is about science. Why'd you come to me?
Sheldon: Well, because it's also about my reputation. And somehow you manage to hold your head high despite your checkered past.
Penny: Checkered past?
Sheldon: It's a figure of speech referring to how sexually promiscuous you were.
Penny: Really? Well, I've got a figure of speech about how sexually promiscuous you can go be with yourself.

Bert: Well, you know, we geologists always get a little sad when Rocktober's over.

Bert: Hey, Sheldon.
Sheldon: I've been thinking about it, and I suppose I could help you with your research.
Bert: What changed your mind?
Sheldon: Bert, I'm a gift horse. Don't look me in the mouth.

Leonard: Hey, how's Bernadette handling bed rest?
Howard: She lies around all day eating Mallomars and hollering at me, so her transformation from my wife to my mother is complete.
Sheldon: Congratulations. I know that's what you were hoping for.

Penny: All right, just give her some space, all right? Don't call, don't text, don't e-mail.
Raj: That's crazy. What if I see a sunset that reminds me of her?