(Penny and Kurt hug). (She kisses him again. (She kisses hm.) Howard knocks on Penny's door with his bow. Howard: As in, costumes? I have such difficulty speaking to women. Kurt is watching.) Kurt: Fine. Leonard is dressed as Frodo. Leonard: All I'm saying is that this party is the perfect opportunity for Penny to see me as a member of her peer group. Leonard: Oh, he's the Doppler Effect. Leonard: That's Penny's ex-boyfriend. Penny: No, come on, it's going to be fun, and you all look great, I mean, look at you, Thor, and, oh, Peter Pan, that's so cute. Raj (Entering dressed as Thor): Hey. Raj: What? Sheldon and Leonard are now talking to a girl in a princess costume. Sheldon: A Halloween party? Sheldon: Good. That's how we roll in The Shire. Um, this party is my first chance for Penny to see me in the context of her social group, and I need you not to embarrass me tonight. When people are upset the cultural convention is to bring them hot beverages.
Plan: A: first decline; Q: What do the guys do when Penny invites them to her Halloween party? A: costumes; Q: What convinces the guys to go to Penny's party? A: Sheldon; Q: Who is unable to explain his Doppler effect costume? A: Thor; Q: Who is Raj dressed as? A: women; Q: Who can Raj not speak to? A: Howard; Q: Who is mistaken for Peter Pan? A: Robin Hood; Q: Who is Howard dressed as? A: Leonard; Q: Who is dressed as Frodo Baggins? A: Penny's ex-boyfriend Kurt; Q: Who shows up at the party and confronts Leonard? A: a very tall, muscular caveman; Q: What was Penny's ex-boyfriend dressed as? A: Kurt's behavior; Q: What does Penny apologize for? A: Shire; Q: Where does Leonard say "That's how we roll at the ______!"? A: his apartment door; Q: What does Leonard lock in panic? A: a "very good listener; Q: What does the girl Raj is sleeping with think of him? Summary: Penny invites the guys to her Halloween party. They at first decline as they do not dance, but accept when costumes are mentioned. At the party they have problems socializing: Sheldon is unable to explain his Doppler effect costume since none of Penny's friends are physicists or smart enough to understand it; Raj (dressed as Thor) cannot speak to women; Howard as Robin Hood is mistaken for Peter Pan; and Leonard (dressed as Frodo Baggins from The Lord of the Rings) is insecure. Penny's ex-boyfriend Kurt (underdressed as a very tall, muscular caveman) later shows up and aggressively confronts Leonard, causing him (and later Penny) to leave. Penny goes to check on Leonard and apologizes for Kurt's behavior. She is very upset, but Leonard tells her she is perfect, and they kiss, though Penny confesses she is drunk. They kiss again, in sight of Kurt, Leonard saying "That's how we roll at the Shire!" before locking his apartment door in panic. Meanwhile, Howard cannot find Raj, who is at home sleeping with a girl who finds him to be a "very good listener".