Leonard: You realize if the military declares our research classified, they can take the whole thing away from us.
Howard: And if that happens, we'll never be able to sell it commercially.
Leonard: There goes our big payday.
Howard: I was counting on that money. I need to make as much as my wife so I don't have to try so hard in bed.
Leonard: You do that, too?
Howard: Oh, yeah. How do you think I stay this thin?

Sheldon: Gentlemen, I think we are losing sight of the real issue. We are on the precipice of becoming faceless cogs in the military-industrial complex. Isn't that exciting?
Raj: You're kidding, right?
Sheldon: Not at all. In Star Wars, when the stormtroopers would march in perfect formation, harassing civilians, didn't you ever think, "Hey, that could be me"?
Howard: Sheldon, we could be contributing to a weapons system that oppresses mankind for the next thousand years.
Sheldon: Okay, Howard's on board.

Sheldon: Look at this. Elon Musk has a theory that we're all just characters in some advanced civilization's video game.
Leonard: So some alien kid spent his money on the asthma-and-glasses upgrade for me?
Sheldon: Well, he doesn't say it's a good game.

Amy: Sheldon, your mother's an attractive woman. You need to get used to the fact that men are going to be interest in her.
Sheldon: Well, and you need to drive the car and mind your business.
Amy: I will not have you be disrespectful to me.
Sheldon: What- you're not my mother.
Mary Cooper: Don't you be disrespectful to her.
Sheldon: Yes ma'am.
Mary Cooper: You'll get there. You've just gotta put some zing on it.

Bernadette: Anybody have anything snarky to say about that? Didn't think so.

Alfred Hofstadter: I'd like to say something. Beverly, I know that we don't bring out the best in each other. But something wonderful did come from our relationship, that young man right there.
Beverly Hofstadter: I couldn't agree more.
Stuart: (tearing up) That's beautiful.

Sheldon: Leonard, you and I have our ups and downs. But I have always considered you my family. Even before the recent threat of our parents fornicating like wrinkly old rabbits. I don't always show it, but you are of great importance to me. Both of you.

Beverly Hofstadter: Thank you for taking us to the airport.
Leonard: Hey, I'm just thrilled we're all getting along for a minute.
Alfred Hofstadter: Yeah, me, too. Beverly, I'm sorry if I upset you.
Beverly Hofstadter: Water under the bridge, Alfred. Leonard, why don't you get into the carpool lane?
Alfred Hofstadter: Well, that's a solid line. He can't cross it.
Leonard: That's okay. I can make it over.
Beverly Hofstadter: No, no, let's plod along. It'll make your father feel more comfortable.
Alfred Hofstadter: What makes me comfortable is knowing I don't have to wake up tomorrow morning and see your sour face.
Beverly Hofstadter: Do the world a favor, and don't wake up tomorrow morning.
Leonard: That was almost a minute.

Mary Cooper: There's a lot of traffic. Are we gonna be okay?
Amy: You'll be at the airport an hour before your flight.
Mary Cooper: Good. Thank you.
Sheldon: Plenty of time for you to meet another geriatric boy toy.
Mary Cooper: Hey, I will not have you be disrespectful to me.
Sheldon: Yes ma'am.

Bernadette: We're here today to celebrate love.
(Beverly sighs loudly)
Alfred Hofstadter: Sigh louder, no one heard you!

Bernadette: Not just Leonard and Penny's love, but the love we have for them, as well as each other.
Sheldon: Speaking of love, STDs among the elderly are skyrocketing.

Bernadette: Love is patient, but it's not gonna put up with all the side chatter, so let's knock it off!
Howard: At least she's yelling at someone else for a change.
Bernadette: Howard!

Penny: Okay, I understand everyone's a little tense today, so I am just gonna get to the important stuff. Leonard, standing here with you in front of our family and friends is bringing up a lot of feelings. Like what a good idea it was to elope the first time. But also how incredibly happy you make me. Thank you for marrying me. Hopefully for the last time.

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Wyatt: It's nice to meet the woman who raised this fine young man. I'm looking forward to meeting his father.
Beverly Hofstadter: Prepare to be disappointed.