Libby: Yeah. Maybe I'll see y'all tomorrow.
Tam: Right. Maybe y'all will.
Sheldon: Bye, Libby. [to Tam] "Y'all"?
Tam: I'm assimilating. Shut up.

Tam: So we eat in the library every day. You're welcome to join us.
Sheldon: It's much better than the cafeteria. It's quiet, and a lot less food gets thrown at us.

Libby: What about you?
Tam: Oh, geology for sure.
Libby: Hmm.
Sheldon: Really? When did you decide that?
Tam: A long time ago. Eat your apple slices. [turns back to Libby and smiles]

Libby: Do you know what you're going to major in in college?
Sheldon: I'm leaning towards quantum chromodynamics, but who knows? A few years ago, I would've said choo-choo trains.

Sheldon: You're gonna be a geologist. That's fascinating. Why'd you choose that?
Libby: When I was a little girl, my grandparents took me to Carlsbad Caverns, and I was hooked.
Tam: Exploring caves, that is super cool.
Sheldon: Disagree. Dark, enclosed spaces are terrifying. I get scared putting on a sweatshirt.
Libby: Hmm.
Tam: I've seen it. Pretty entertaining.

Adult Sheldon: The addition of Libby brought a level of sophistication to our lunchtime discussion.
Her mom also packed extra string cheese, which is a well-known social lubricant.

Libby: What do you want?
Sheldon: Would you like to have lunch with me and my friend?
Libby: Why?
Sheldon: Why else? So we can have a spirited conversation about geostatistics.
Libby: You really are as smart as everybody says.
Sheldon: My teeth are small, but my prefrontal cortex is enormous.

Sheldon: Hello.
Libby: Hello.
Sheldon: My name is Sheldon.
Libby: Yeah, you're Sheldon Cooper.
Sheldon: You know who I am?
Libby: Well, there's only one nine-year-old in high school, and you still have your baby teeth.
Sheldon: [to Tam] She knows who I am. It's going well.

Tam: All right, go ask her.
Sheldon: Why me?
Tam: Your lack of testosterone makes you adorable to women.
Sheldon: I can't argue with that.

Sheldon: Whoa. That girl just took a book on geostatistics.
Tam: Yeah, so?
Sheldon: That's not required reading for any science course.
Tam: Maybe she wants to squash a spider with it.
Sheldon: No, look, she's reading it. Who is this mystery woman?
Tam: Should we invite her to have lunch with us?
Sheldon: I don't know. So far, it's just been you and me, and we know that works. Do we really want to mess with success?
Tam: We could think of it as an experiment.
Sheldon: Oh, you do know how to push my buttons.

Tam: What are you doing?
Sheldon: I heard you could punch a hole in these and make them double-sided.
Tam: Then it would have more storage?
Sheldon: Yes, but I didn't pay for a double-sided floppy disk.
Tam: So?
Sheldon: So it's an ethical dilemma.
Tam: We have to take a shower in the locker room next period, and that's what you're worried about?
Sheldon: Actually, I have a bathing suit under my pants.

Missy: Wait till you hear what I did to Meemaw.

Adult Sheldon: In 1989 the Milton Bradley Company had dozens of board games on the market, but only one where you were the doctor. Operation came complete with a red light-up nose, 13 plastic body parts for players to remove and, most importantly, one pair of genuine tweezers. My sister performed a medical procedure using a children's board game, while I bravely sat very still. I guess you could say there were two heroes that day.

Missy: Found 'em.
Sheldon: The tweezers?
Missy: Mom's needles and her magnifying glass.
Sheldon: Absolutely not.
Missy: Let me at least try.
Sheldon: No.
Missy: You're being a baby.
Sheldon: Nothing you can say will change my mind.
Missy: What if it gets infected and turns green and they have to cut it off?

Mary: God, please give me the strength to not spread this juicy gossip about Pastor Jeff.

Pastor Jeff: This morning, while Selena was in the shower, I went through her purse and I took the credit card.
Mary: Oh, my.
Pastor Jeff: Now, do you think that's stealing, or is it doing the right thing? You know, saving us from bankruptcy and whatnot?
Mary: Wow. Um, yeah, that's complicated. Um going through her purse is probably wrong, but on the other hand ... well, there is no other hand.

Pastor Jeff: Got a minute?
Mary: Sure, come on in.
Pastor Jeff: I just wanted to apologize. It was wrong of me to unload my personal business on you. Here it is, your first day and all.
Mary: Oh, that's fine. Always happy to lend an ear.
Pastor Jeff: Great, 'cause I didn't tell you everything.
Mary: Really? 'Cause you told me a lot.

Sheldon: Hello. Cooper residence. Sheldon speaking.
Mary: Hey, Shelly.
Sheldon: Oh, hello, Mom. How's your day going? [silence] Shelly? Shelly? You there?
Sheldon: Yes, I'm here. [to Missy] She wants to know how my day's going.
Missy: Say it's going good.
Sheldon: I can't say that.
Missy: Why not?
Sheldon: It's bad grammar.
Missy: How are you supposed to say it?
Sheldon: "It's going well."
Mary: Oh, that's nice. I've got to get back to work, but I love you and miss you very much.
Sheldon: Okay. [hangs up] I handled that really well.

Missy: That was intense.
Sheldon: I don't think I'm cut out for this latchkey life.

George Sr.: Hey, it's Dad. How you guys doing?
Missy: We're great.
George Sr.: Glad to hear it.
Missy: I'm watching TV, and Sheldon's reading quietly.
George Sr.: I knew you could handle this. I'm proud of you.
Missy: You know what? I'm proud of us, too.
George Sr.: Okay, baby doll, I'll be home in a couple hours.
Missy: Stay out all night. We got this.
George Sr.: Wha- Love you, too.