Penny: Sheldon, we're getting married.
Sheldon: But you've been engaged for over a year now, and you don't even have a wedding date.
Penny: Well, we will. We're just not in a rush.
Sheldon: Okay.
Leonard: We're gonna set a date.
Sheldon: Okay. If you say so.
Penny: Yeah, it's just, things are good right now.
Leonard: Really good.
Penny: I'm focusing on my job.
Leonard: And we've been busy with our paper.
Penny: So busy.
Leonard: Yeah, we'll pick a date when we pick a date.
Penny: Yeah.
Sheldon: Okay.
Penny: You know, I can see why Amy's mad at you!
Leonard: Yeah, shut up, Sheldon!

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Sheldon: This song is never going to stop. Have you ever dealt with something so relentlessly irritating?
Leonard: That's a trick question, right?

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.

Leonard: What am I supposed to do?
Penny: Err, keep your mouth off other women.

Penny: Wait, what is wrong with you two? He was talking about television during their date night.
Sheldon: Oh, not just date night. Our 5th anniversary.
Penny: Okay, see, that's even dumber than you wondering if being bitten by a goat would give you the powers of a goat.
Sheldon: If that happens, don't make me wait ten years to watch you eat a tin can.

Sheldon: Amy's mad at me, and I'm not clear why.
Penny: Okay, were you talking before she got upset?
Sheldon: Yes.
Penny: That's probably it.