S01E06 -Penny: Hey, I'm having a party on Saturday, so if you guys are around, you should come on by. -Leonard: A party? -Penny: Yeah. -Howard: A. "boy-girl" party? -Penny: Well, there will be boys and there will be girls and it is a party, so...It'll be a bunch of my friends. We'll have some beer, do a little dancing... -Sheldon: Dancing? -Leonard: Yeah, I don't know, Penny... -Sheldon: The thing is, we're not... -Leonard: No, we're really more of a... No. But thanks. Thanks for thinking of us. -Penny: Are you sure? Come on, it's Halloween. -Sheldon: A Halloween party? -Howard: As in... costumes? -Penny: Well, yeah. -Leonard: Is there a theme? -Penny: Uh... Yeah, Halloween. -Sheldon: Yes, but are the costumes random, or genre-specific? -Penny: As usual, I'm not following. -Leonard: He's asking if we can come as anyone from science fiction, fantasy... -Penny: Sure. -Sheldon: What about comic books? -Penny: Fine. -Sheldon: Anime? -Penny: of course. -Sheldon: TV, film, D&D, manga, Greek gods, Roman gods, Norse gods... -Penny: Anything you want! Okay? Any costume you want. Bye.