Howard: My mother is so gonna love her.
Sheldon: Oh, how nice. Maybe they can carpool when they visit you in federal prison.

Howard: OK, I guess we have to turn to Plan B.
Raj: What's Plan B?
Howard: Erase all the hard drives, scrap the surveillance tapes, wipe our fingerprints off every surface and run.
Sheldon: Why wasn't that Plan A?

Sheldon: Will you all excuse me? Leonard is subtly signaling that he'd like to talk to me in private.

Sheldon: This would have worked out a lot better if you'd just told me you were going the office.
Leonard: I'm going to the office.
Sheldon: See, why don't I believe you?

Leonard: Hi, Howard. Howard?
Howard: Sheldon.
Sheldon: Howard is employing a schoolyard paradigm in which you are, for all intents and purposes, deceased. He intends to act on this by not speaking to you, feigning an inability to hear you when you speak and otherwise refusing to acknowledge your existence.
Leonard: That's just ridiculous. Why are you cooperating with him?
Sheldon: I don't make the rules, Leonard.

Leonard: Howard, come on, I didn't plan on this. These things just happen. Usually not to me, but they do happen.
Howard: Did someone just feel a cold breeze?
Sheldon: I believe this is an extension of the death metaphor. The cold breeze is the so-called ectoplasmic issue of a disembodied soul passing by.

Penny: All right, want some French toast?
Sheldon: It's Oatmeal Day.
Penny: Tell you what, next French Toast Day, I will make you oatmeal.
Sheldon: Dear Lord, are you still going to be here on French Toast Day?

Sheldon: Look, Leonard, Penny made French toast.
Leonard: Sorry. I haven't given her your schedule yet.
Sheldon: It's an iCal download, she can put it right in her phone. And I thought we agreed that you'd have your conjugal visits in her apartment.
Leonard: We did, but there were extenuating circumstances.
Sheldon: I see. Did her abysmal housekeeping skills finally trump her perkiness?

Sheldon: There's just no pleasing you, is there, Leonard? You weren't happy with my previous approach to dealing with her, so I decided to employ operant conditioning techniques, building on the work of Thorndike and B.F. Skinner. By this time next week, I believe I can have her jumping out of a pool, balancing a beach ball on her nose.
Leonard: No, this has to stop now.
Sheldon: I'm not suggesting we really make her jump out of a pool. I thought the Bazinga! was implied.

Sheldon: I'm just tweaking her personality, sanding off the rough edges if you will.
Leonard: No, you're not sanding Penny.
Sheldon: Are you saying that I'm forbidden from applying a harmless, scientifically valid protocol that will make our lives better?
Leonard: Yes, you're forbidden.
Sheldon: (Squirts Leonard with a water spray) Bad Leonard!

Leonard: What could she possibly be talking about for so long?
Sheldon: Obviously, waitressing at the Cheesecake Factory is a complex socioeconomic activity, that requires a great deal of analysis and planning. Bazinga!

Sheldon: You know, using positive reinforcement techniques, I could train that behavior out of her in a week.
Leonard: No.
Sheldon: If you let me use negative reinforcement, I can get it done before we go to bed.
Leonard: You're not squirting her in the face with water.
Sheldon: No, of course not. Were talking very mild electric shocks. No tissue damage whatsoever.

Sheldon: Oh, come on, you can't tell me that you're not intrigued about the possibility of building a better girlfriend.
Leonard: I'm not. And Penny's qualities, both good and bad, are what make her who she is.
Sheldon: You mean, like that high-pitched, irritating laugh?
Leonard: Yes.
Sheldon You wouldn't prefer a throaty chuckle?
Leonard: You're not changing how Penny laughs.
Sheldon: No, that would be incongruous, I was going to lower the whole voice to a more pleasing register.

Sheldon: Well, I'm going to make some warm milk and then turn in. I trust if you two are planning in engaging in amorous activities, you'll keep the decibel level to a minimum.

Penny: Hey, guys. What you doing? Going out to discover electricity?
Sheldon: If you're referring to the work of Benjamin Franklin, he did not discover electricity, he merely used a kite to determine that lightning consists of electricity. He also invented the Franklin stove, bifocals and the flexible urinary catheter. Kites, ho.