He owns the store. Howard: You got her to have s*x with you. I changed my mind. I'm not spending my New Year's Eve at a comic book store wearing a Wonder Woman costume. Leonard: That's an atom. Leonard: Yeah, we came to talk to Zack. Penny did it. Penny: Okay. Penny: What the hell is wrong with you? Scene: The comic book store. Sheldon: Why not? Stuart: And the award for best group costume goes to Justice League of America number three! The costume came with a black wig. Zack: We're going to a costume party at the comic book store on New Year's Eve, and you get to be Wonder Woman. Zack: You guys want to come in and have a beer?
Plan: A: Penny; Q: Who gets back together with Zack? A: Zack's low intelligence; Q: What did the guys insult? A: a costume contest; Q: What do the five enter? A: a Wonder Woman costume; Q: What costume does Penny refuse to join in? A: New Year's Eve; Q: What holiday did Penny want to spend with Zack? A: the fun times; Q: What does Penny remember about Zack? A: her mind; Q: What does Penny change after Leonard talks to her? A: the Best Group Costume; Q: What award did the group win at the comic book store? A: a female Wonder Woman; Q: What character did the group win the Best Group Costume award for? A: an ongoing car theft; Q: What do the six witness? A: Justice League costumes; Q: What costumes do the six wear when they witness a car theft? Summary: Penny gets back together with Zack. The guys insult Zack's low intelligence which upsets him; however he reconciles with the four and accompanies them to the comic book store. The five enter a costume contest and urge Penny to join in a Wonder Woman costume. She refuses until Leonard talks to her. She reveals that she got back together with Zack only because she did not want to spend New Year's Eve alone. Leonard questions why not with him, prompting Penny to suddenly remember the fun times she used to have with him, convincing her to change her mind. At the comic book store, the group win the award for the Best Group Costume, although it is hinted that they only won because they included a female Wonder Woman. The episode concludes with the six witnessing an ongoing car theft and then scurrying off cowardly despite wearing Justice League costumes.