Leonard: Thought you were getting us dinner.
Penny: Sorry. I had to stop at Sheldon's and help him solve string theory.
Amy: What?
Penny: Yeah, turns out the answer's knots.
Leonard: That's cute, but you can't have knots in more than four dimensions.
Penny: Mmm ... you can if you consider them sheets. [chuckling] Good night.

Amy: Maybe we should just get married at City Hall and forget about everything else.
Sheldon: City Hall, hmm. I do like metal detectors and the sound of permits being denied.

Howard: Look, I I can see you're upset, but I'm gonna need some ground rules. I mean, while we're apart, can I see other needy Indian men?

Sheldon: Oh, Amy. Good, you're here.
Amy: Hi. What's up?
Sheldon: How would you like to be on television?
Amy: Is it gonna be a news story where I have to say you were quiet and kept to yourself and I'm as shocked as anyone?

Leonard: Do you guys have a location yet? 'Cause you don't have a lot of time.
Amy: Hey, it took us nine months to pick a date, and a week to decide if brains can have lips on them, so get in the boat and row.

Georgie: After all my sacrifices, guess which kid my mom is the most proud of?
Leonard: If it makes you feel any better, my mom's most proud of Sheldon, too.

Sheldon: Until next week, this is Professor Proton saying, 01000010 01111001 01100101. That's "Bye" in ASCII binary, or good-binary.

Penny: Is it possible that you're stressed because you're scared about getting married? I mean, it is a big change, and you're not good with little changes.
Sheldon: Well, that's nonsense. You name one little change I was upset with.
Penny: Uh, when they changed the green Skittle from lime to apple.
Sheldon: That is not the rainbow I grew up tasting.

Penny: No, I've been reading Bernadette's parenting book. It's like the answer key to the Sheldon test.

Sheldon: Sorry, but when you make a discovery like this, you don't just take it down to City Hall. You tell the whole world. And so I'll say it in Latin or Klingon or smoke signals, if that's not cultural appropriation.
Amy: It is.
Sheldon: Okay, so not smoke signals.

Sheldon: Amy, I usually know exactly what to say. But in this moment I have no words.
I guess I'm overwhelmed by you. In a good way. Not in the elevator in the Haunted Mansion way. Even if I can't tell you now how I feel, I will spend my life showing you how much I love you.

Barry Kripke: At wast, my wove has come awong, my wonewy days are over, and wife is wike a song, oh, yeah.

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?

Amy: Should we go congratulate him?
Sheldon: I'll do better than that, I'll give him constructive criticism.
Amy: Here's some constructive criticism: don't.

Sheldon: So with this level of high-power laser array, we would actually be able to solve the black hole information paradox once and for all.
President Siebert: That's impressive, and how much funding were you looking for?
Sheldon: $20 million.
President Siebert: Really? You think you can build that for $20 million?
Sheldon: Not a chance.
President Siebert: I'm sorry, then why are you asking me for it?
Sheldon: Because once you've spent $20 million, you're much more likely to give me an additional 50.
President Siebert: So actually, what you're saying is with $70 million, you can build this.
Sheldon: I can see why you'd think that, but no. You can't go to the board of trustees and say you gave Sheldon Cooper $70 million and have nothing to show for it. No, the only way you'd be able to save face is to double down.
President Siebert: So 140?
Sheldon: And then double again.
President Siebert: 280?
Sheldon: And then - good news - not quite double again. So, uh, what do you say? We have a deal?