When Penny's friend Christy arrives from Nebraska, she creates tension within the group. The guys try to get Penny to fill in the gap left by Wolowitz.
- Anything That Moves: Christy will sleep with anyone who buys her things.
- Fight for the Last Bite: The episode gets its name for a scene in which the guys minus Howard, who is dating one of Penny's friends, are eating at a Chinese restaurant and debate what to do with the leftover dumpling.
- Gold Digger: See above. Mrs. Wolowitz refers to her as "gold digger."
- Ignore the Fanservice: Penny brings a group of attractive friends over on Halo Night. The guys are too engrossed in the game to notice.
- Sore Loser: When Penny continuously kills Sheldon's character when they are playing Halo, Sheldon gets fed up and accuses Penny of cheating, stating nobody can be as attractive as her and as skilled at video games at the same time. Penny doesn't get angry at his accusations though, and simply kills his character again when he is walking out of the room.