Bernadette: I just don't know what the right thing to do is. If I go back to work, I'm abandoning Halley. If I don't go, I'm giving up everything I worked for. It's like there's no right choice.
Howard: Look, I don't know what the best decision is, either. But whatever we choose, if we're not happy, we can undo it.
Bernadette: I guess.
Howard: And the best part is: Halley won't remember a thing. (laughs) Babies are cute, but they're dumb.
(chuckles) I mean, I go like this, she thinks I'm gone. Then magically I'm back. I mean, honestly, why are we saving for college?
Bernadette: I'm not crazy about you calling our baby dumb.
Howard: Well, she gets it from me.

Bartender: You gonna buy another round for the house?
Sheldon: Uh, no, thank you. (To Leonard) We now know why MasterCard sent me a fraud alert.

Howard: All right, this is everything. What do you want to learn?
Sheldon: It really doesn't matter, as long as it's challenging.
Howard: Okay, well, how about, oh, I teach you some close-up magic.
Sheldon: Howard, I'm trying to make myself uncomfortable, not everyone else.

Leonard: Ask him.
Sheldon: Um, yes. Howdy, partner. Do you happen to recollect if I left a notebook in these here parts?
Raj: These here parts?
Sheldon: It's called fitting in. By the way, good luck.

Penny: Yeah, lying isn't my favorite part of the job. Actually, I'm not crazy about a lot of it.
Zack: Hey, if you're not happy there, I've been looking for a new head of sales at my company. And we don't sell drugs, just menus, so the only lie you'll be telling is we print on recycled paper. We don't.

Bernadette: What if she likes the people who work there more than us?
Howard: She already likes soap bubbles more than us.

Penny: So is this your first time dating a scientist? 'Cause I'm thinking of starting a support group.
Rebecca: Actually, I'm not new to this. I was engaged to a Scientologist.

Sheldon: Okay, quick question. Am I allowed to exchange pleasantries upon meeting this colonel?
Leonard: Yes.
Sheldon: Am I allowed to inform him that Colonel Sanders was never actually in the military?
Leonard: I'm getting enraged.

Zack: Do you have a bodyguard to keep spies away?
Leonard: I have Sheldon, that keeps most people away.
Zack: I miss that guy. He's like the Swedish Chef Muppet. I don't know what he's saying, but he's funny.
Leonard: Oh, I know what he's saying, and he's not, he's not funny.

Bernadette: So you wanted to learn something physical and you came to Howard Wolowitz?
Howard: Hey, the circus arts are very physically and mentally demanding. Have you ever tried to juggle?
Bernadette: Yes, I'm juggling my love for you and my embarrassment of you right now.
Howard: And it's hard, isn't it?

Wyatt: Welcome to the family, Leonard. Don't lend your new brother-in-law money.

Leonard: So, Rebecca, how did you become a personal trainer?
Rebecca: I came to Los Angeles to be an actress, and things didn't really work out.
Sheldon: I'd say she's copying you again, but I'm getting tired of sitting in the hall.

Raj: So how did you two meet?
Rebecca: Oh, it's such a cute story! We met on a dating Web site.
(silence)
Leonard: Is that it?
Rebecca: Oh, sorry. The end.

Sheldon: What happened to me? I used to excel at these things.
Howard: Kids are always better at video games.
Sheldon: Well, I don't like it.
Leonard: If it makes you feel better, you still dress like a child.

Sheldon: Hello, I'm Dr. Sheldon Cooper.
Amy: And I'm Dr. Amy Farrah Fowler.
Sheldon: Based on the glowing reception of our recent Behind the Flags retrospective, we thought you might like to see how it all came together.
Amy: So welcome to tonight's episode,
Both: Fun with Flags - Behind the "Behind the Flags: A Retrospective" Retrospective.