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.

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.

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?

Penny: Hey, where are you going?
Leonard: Back to the dry cleaner. Look at this. They didn't get the stain out of my Starfleet uniform.
Penny: Well, if you didn't make me wear the green body paint in bed, you wouldn't have to get it dry-cleaned so much.
Leonard: Nah, it's worth it.

Penny: Hey, Beverly.
Beverly Hofstadter: Oh, hello, Penny.
Penny: Uh, Leonard just left. He's gonna be so upset he missed your call.
Beverly Hofstadter: Why?
Penny: Because he ... Yeah, I don't know.

Howard: I haven't looked at all this stuff in years.
Sheldon: Had it. Had it. Burnt down my garage with it.

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.

Howard: Could never bring myself to open it without him. It's silly.
Sheldon: No, it's not silly. I always wanted my dad to build rockets with me, but he wasn't interested.
Raj: Ah, yes, disappointing fathers. Tell me about it. I remember for my 16th birthday, my dad bought me a Mercedes. Like, a little one, like a starter Mercedes. He had barely handed me the keys before he had to rush back to work. I didn't see him again till, like, pretty late that night.

Howard: Anyway as angry as I was with him leaving, building this stuff is probably what led me to become an engineer.
Sheldon: I suppose, in his own way, my dad also encouraged me to pursue science. I mean, he is the one that taught me that flatulence is combustible. And also, polyester gym shorts don't burn. They melt.

Raj: Yeah, I guess I'm an astrophysicist because, as a kid, I said I like to look at the stars, so my dad sent me to Hawaii to visit the Keck telescope. Screw you. My pain is real.

Howard: You know what? Forget the past. What do you say you and me build this rocket?
Sheldon: That sounds like it could be a real bonding experience for us.
Howard: Right?
Sheldon: Oh, I see. Oh, you think that's a positive.