Nathan: So how do you know Dr. Smith over there?
Sheldon: That's not Dr. Smith, that's Mr. Givens. He was my high school science teacher.
Nathan: Oh. Well, he's dressed as Dr. Smith from Lost in Space.
Sheldon: Oh, I've never seen it.
Nathan: Yeah, well, you're not missing much. It was a lame kids' show.
Mr. Givens: I'm sorry, "lame kids' show"? For your information, Star Trek wouldn't exist without Lost in Space. [all oohing]
Nathan: Yeah, well, at least Star Trek didn't have to steal its robot from Forbidden Planet. [all oohing]
Sheldon: I take it from their reaction that was a good dig?
Nathan: Solid.
Sheldon: Nice job.

Mary: Let's say grace.
Sheldon: Hang on, safety first. [puts mittens on]
George Jr.: When are you gonna get over that?
Sheldon: I would think recent events would make you value protection.
Mary: Enough.

Ms. MacElroy: Now, can anyone tell me why Melville shifts the narrative voice from Ishmael to Ahab? [Ms. MacElroy waits for somebody else to raise their hand] Sheldon.
Sheldon: I have a tummyache. I'd like to see the nurse.
Derek: A "tummyache"?
Sheldon: Yes, Derek, I have a tummy and it aches. Ergo, tummyache.
Derek: Ergo?
Sheldon: It's Latin, Derek.
Ms. MacElroy: Go to the nurse.
Sheldon: And to answer your question, the shifting point of view grants the reader a broader perspective of events than typically allowed by first-person narration.
Ms. MacElroy: Where were we?
Sheldon: And "ergo" is Latin for "hence," Derek.

Missy: What's it like to not believe in God?
Sheldon: It's great. Big fan.
Missy: Are you ever afraid you're wrong?
Sheldon: About religion? Never. About other things? Also never.

Sheldon: Mom, I know what I want to do for spring break. What happened to your face?
Mr. Lundy: Told you, people take notice.
Mary: This is for my new job.
Sheldon: Is your new job fighting Batman? Because you look like The Joker.

George Sr.: Sales is a tough racket, Mare.
George Jr.: Yeah. It ain't as easy as I make it look.
Mary: Well, I think I'd be good at it.
George Jr.: You sure? Sometimes you got to do a little fibbin'.
Mary: I would do it without that.
George Jr.: And you got to have people skills.
Mary: I have people skills.
George Jr.: Do you?
Mary: I'd like to throw my dinner roll at your head right now, but you don't see me doing it.

Mary: I'm not buying it. I'm thinking about selling it.
George Sr.: You?
Mary: Yes, me. Wouldn't hurt to have extra money.
Sheldon: But you already have two jobs... church and mom.
Mary: Well, that second one doesn't pay much.
Sheldon: I do your taxes. The first one doesn't either.