1. Season 8, episode 22, Part 9
Scene: Penny's apartment.
Penny: What's taking so long?
Leonard: I don't think this is gonna work.
Penny: Just let me see. Sweetie, you know you're supposed to wear clothes underneath a graduation gown.
Leonard: A, surprised you know that. B, I wanted to look like a sexy graduate for you.
Penny: Oh. Well, you do.
Leonard: Thank you.
Penny: Yeah. You're gonna be on Skype, they're not gonna see your legs.
Leonard: Well, I'm gonna go put on some pants just in case. But I have to say, this is very freeing.
Penny: Add a belt and I'll take you some place nice.
Leonard: Oh. Done and done.
Scene: The apartment.
Howard: Okay, I think I've narrowed it down to a faulty pin on the onboard communication chip.
Sheldon: Very impressive. You know, when you're done with that, can you look at this? It doesn't make smoke anymore.
Howard: One toy at a time.
Sheldon: Mm. Sorry. Ah, maybe it's for the best. I hear locomotive smoke is the second leading cause of death among train aficionados.
Raj: What's the first one?
Howard: Suicide.
Sheldon: Wrong. Obesity.
Bernadette: I have the tool you wanted.
Howard: Thank you.
Raj: You guys don't have to go to the trouble. I'm back in the money now, I can just buy another helicopter.
Howard: It's not about the money. It's about solving a problem. It's why I became an engineer. It's what I like to do, it's what I'm trained to do. It's who I am.
Sheldon: Oh, look at you, the little engineer that could.
Bernadette: Why don't you just call tech support?
Howard: Hey.
Sheldon: Whoa.
Raj: Not cool.
Bernadette: What?
Howard: There's two kinds of people in this world, those who call tech support, and those who make fun of the people who call tech support.
Bernadette: I call tech support all the time.
Howard: Ha-ha.
Sheldon: You call tech support.
Raj: What a baby.