Penny: Well, as it turns out, there is a little reception for Mr. Gates tomorrow night. I asked if I could bring you, and they said yes.
Leonard: What?
Penny: Yeah, you get to meet Bill Gates again.
Leonard: Wait, what do you mean "again"?
Penny: 'Cause you met him that one time with your mom.
Leonard: Yes. And then again tomorrow, for a total of two, and only two times.
Penny: Yeah. I wonder if he'll remember you.
Leonard: Yeah, I wonder that, too.

Bernadette: The sun is losing about six times ten to the 12th grams per second, so the fraction of the mass it loses every year is about ten to the negative 13th. But don't worry. It'll be millions of years before we all freeze to death. Sweet dreams.

Bernadette: Evolution gave me this mom brain to focus on the baby, but I figure I can hack it to learn all kinds of new things.
Howard: Well, that's great.
Bernadette: Yeah. There was a problem, and I fixed it.
Howard: Like Bob the Builder in that giraffe cage.
Bernadette: Spoiler alert. I didn't see that one yet.

Howard: So that's fun. You get to meet Bill Gates again.
Leonard: It's not fun, I'm screwed.
Raj: It's fun for us.
Howard: Maybe he won't remember you.
Leonard: I snotted on his tie.
Raj: Yeah, you did, like, a lot.

Sheldon: Hello, Leonard. Thought I'd find you here. You snake.
Howard: What's going on?
Sheldon: He sent me all the way to Thousand Oaks to meet Bill Gates when he knew full well he wasn't staying there.
Raj: Wha-- Leonard, that's terrible.
Howard: Yeah, why would you do that? You know he's staying at the DoubleTree in Long Beach.
Sheldon: Aha! Wait. How do I know you're not tricking me?
Howard: We probably are.
Raj: But what if we're not?
Sheldon: You think you're so smart. You think I'm going to fall for it again, don't you? Well, I won't.
Leonard: Where you going?
Sheldon: Shut up.

Bernadette: I mean, really, the bigger danger isn't the loss of mass. Instead, it will run out of hydrogen to use for nuclear fuel, swell up into a red giant, and fry the Earth.
Amy: So you don't want to split a salad?
Bernadette: No, thank you. But speaking of splitting things, did you hear about the light-splitting greenhouse film that could improve photosynthetic efficiency?
Amy: No.
Bernadette: Just a little something I read while nursing a human being that I made.
Amy: I'm just gonna get the chicken.
Bernadette: Ah. N-E-K-C-I-H-C: chicken backwards. Boom, mom brain.
Amy: And a whole bottle of wine.

Stuart: How are you ladies doing? Raise your hands if you're bueno. Me llamo Stuart Bloom.

Raj: You're like Grey's Anatomy for robots. Also, why isn't that a show?

Bernadette: Aren't you worried there's some kid out there missing his drone?
Raj: Oh, please. This is not a children's toy. This thing's got an HD camera on it.
Bernadette: Aren't you worried that there's some rich peeping tom out there missing his drone?

Sheldon: Why are you wearing a Band-Aid?
Raj: Halley bit me.
Leonard: (laughs) You got beaten up by a girl.
Howard: Hey, that's sexist.
Leonard: You're right. (laughs) You got beaten up by a baby.

Leonard: Hey. What you got there?
Penny: Oh, I grabbed a sandwich at the food truck out front.
Sheldon: Wait, n-now, hold on. Tonight is Friday, and I believe you know what that means.
Penny: That my fun, young life took a drastic turn somewhere?
Sheldon: No.
Leonard: But yeah.

Sheldon: No, that means it's Chinese food night.
Penny: Yeah, and you have Chinese food. So eat it.
Sheldon: But I can smell your pastrami.
Howard: And we can all hear your complaining, so no one's happy.

Sheldon: What is happening? Everybody's supposed to be eating Chinese food.
Amy: Well, actually, I believe the Chinese may have invented the sandwich. Their dish "rou jia moâ" literally means "meat between bread." So, it looks like all of us, including Penny, are eating Chinese food.
Raj: Except for you, Sheldon. You're eating crow.

Amy: And I think you're forgetting that there are written documents of meat between bread being eaten in China during the Tang dynasty.
Bernadette: (to Howard) You know what, I'll go with you. And then maybe we just go home.

Sheldon: Hmm. Well, maybe the Chinese did invent the sandwich. I guess you were right.
Amy: Too bad no one's around to hear it.