Sheldon: You don't see it, do you? We're losing her.
Leonard: Okay, I'm going to make this very simple for you. You are not in this relationship, I am. Ergo, you have no say in anything that happens between me and Stephanie.
Sheldon: I'm afraid I can't allow that. Pursuant to Starfleet General Order 104 Section A, you are deemed unfit and I hereby relieve you of your command.
Leonard: General Order 104, Section A does not apply in this situation.
Sheldon: Give me one good reason why not.
Leonard: Because this is not Star Trek.

Penny: Sheldon, would you like to come in?
Sheldon: I suppose I could spare a few minutes. (Looking at Penny's apartment) Were you robbed?
Penny: No.
Sheldon: How can you be sure?

Penny: Sheldon, what do you want?
Sheldon: I'm certain this will come as no surprise to you, but Leonard is failing in yet another relationship.
Penny: He's having problems with Stephanie?
Sheldon: She's sending virtual livestock to random men on the Internet.

Sheldon: She's sending virtual livestock to random men on the Internet. If I have any hope of keeping them together, I need data. Specifically, I need to know exactly what Leonard did that caused you to pop an emotional cap in his buttocks.
Penny: What?
Sheldon: Again, urban slang. In which, I believe I'm gaining remarkable fluency. So, what is the down and the low? And don't worry, this is all entirely confidential, so, you feel free to include any and all shortcomings in the bedroom.

Sheldon: More to the point, it's about finding a way to keep Leonard and Stephanie together.
Howard: Oh, I don't think you can.
Sheldon: Well, why not?
Howard: Look at Leonard's record. 27 days with Joyce Kim.
Raj: During which she defected to North Korea.
Howard: Two booty calls with Leslie Winkle.
Raj: For which she awarded him the nickname "speed of light Leonard."
Howard: And a three hour dinner with Penny.
Raj: Which would have been two and a half if they ordered the souffle when they sat down.
Howard: Based on the geometric progression, his relationship with Stephanie should have ended after 20 minutes.

Sheldon: So, have you and I returned to a social equilibrium?
Penny: Yes.
Sheldon: Great. New topic. Where are you in your menstrual cycle?
Penny: What?
Sheldon: I've been doing some research online, and apparently female primates, you know, uh, apes, chimpanzees, you, they find their mate more desirable when he's being courted by another female. Now, this effect is intensified when the rival female is secreting the pheromones associated with ovulation. Which brings me back to my question, where are you in (Penny slams door). Clearly, I'm 14 days too early.

Leonard: What are you doing?
Sheldon: I have a craving for white asparagus that apparently is destined to go unsatisfied.
Leonard: Excuse me. What the hell is wrong with you?
Sheldon: I'm helping you with Stephanie.
Leonard: By making constipated moose sounds?
Sheldon: When I fail to open this jar and you succeed it will establish you as the alpha male. You see, when a female witnesses an exhibition of physical domination she produces the hormone oxytocin. If the two of you then engage in intercourse this will create the biochemical reaction in the brain which lay people naively interpret as falling in love.

Sheldon: What a beautiful job Stephanie did. I might have gone with a mattress suture instead of a blanket stitch, but you can't argue with her results. It's a shame it won’t scar, the war wound is a time-honored badge of masculinity.
Leonard: I can't remember a time when you weren't talking.

[Sheldon moves around the movie theater, sitting in various seats and emitting various noises]
Steph: What is he doing?
Leonard: He's finding the "acoustic sweet spot".
Steph: Does he always do this?
Leonard: Sometimes he brings a toy xylophone. I am really sorry about this.
Steph: No, it's fine. You know, he's sweet.
Sheldon: My apologies, you've been sitting in it all along. Leonard, you want to slide over one?
Leonard: No, just sit here.
[As the movie begins, Sheldon cranes his neck over to experience the sound in Leonard's seat]
Sheldon: Oh, yeah, this is it.

Sheldon: I'm sorry but I'm not going to watch the Clone Wars TV Series until I've seen the Clone Wars movie. I prefer to let George Lucas disappoint me in the order he intended.

Sheldon: I believe the appropriate metaphor here involves a river of excrement and a Native American water vessel without any means of propulsion.

Sheldon: Rock - Paper - Scissors - Lizard - Spock

Leonard: How can 5 not be worse than 1?
Raj: Yeah, Star Trek 5 worse than 1.
Sheldon: Okay, first of all that is a comparison of quality not intensity. Secondly, Star Trek 1 is orders of magnitude worse than Star Trek 5.
Raj: Are you joking? Star Trek 5 is the standard against which all badness is measured.

Sheldon: Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and as it always has, rock crushes scissors.

Sheldon: Oh look, Saturn 3 is on.
Raj: I don't want to watch Saturn 3. Deep Space Nine is better.
Sheldon: How is Deep Space Nine better than Saturn 3?
Raj: Simple subtraction will tell you its six better.