Leonard: So, what are you wearing to the party? Sexy cat? Sexy nurse? Sexy zombie?
Penny: Why do girls' costumes have to be sexy but guys' costumes don't?
Leonard: (scoffs) Say that again with this helicopter on my head.
Penny: Very cute.

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.

Leonard: My point is, while you're spending all this time on your own, building computers or practicing your cello, what you're really doing is becoming interesting. When people finally do notice you, they're gonna find someone a lot cooler than they thought. And for those of you that were popular in high school, it's over, sorry. Thank you. Congratulations.

Leonard: [to a "smiling" Sheldon] We're here to see Koothrappali, not kill Batman.

Leonard: Oh, my God, you look amazing.
Raj: I find you guilty of murder, because you are killing it.
Howard: (imitating Sheldon) Well, technically, the Supreme Court wouldn't determine a defendant's guilt or innocence in a criminal matter. They could only reverse or revamp a jury's conviction based on a constitutional or statutory issue.

Raj: Hey, did you guys know this year's the 40th anniversary of Halloween?
Sheldon: Oh, nonsense. Halloween traditions of date back to the Celtic festival of Samhain. Although our current Halloween customs come from the evening before All Hallows' Day, All Hallows' Eve. Thus, Halloween.
Raj: I meant the movie Halloween.
Sheldon: Oh. Well, that's not interesting at all.
Leonard: Did you know the Michael Myers mask from the film was actually a Captain Kirk mask turned inside out?
Sheldon: Okay, now it's interesting.

Sheldon: Oh, Inspector Gadget. And I want to say Supreme Court Justice Ruth Bader Ginsburg.
Raj: So close. Kooth Bader Ginsburg. The Notorious KBG.
Sheldon: That's very clever.
Raj: [striking a gavel] Sustained.