Mr. Schuester’s former high school nemesis, Bryan Ryan, causes trouble for the glee club. Meanwhile, Rachel struggles with a life-long personal issue, and Artie’s dreams take him on an adventure.
Raj struggles with guilt when he dates two women at once; Penny has a chance to play a part in a cheesy movie; Sheldon is torn between two gaming systems.
Howard considers whether or not he should open a letter from his father when Sheldon cleans his closet; Penny and Leonard host a "grown-up" cocktail party.
Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.
The guys go all out to help Sheldon find the person responsible for hacking his online gaming account, while the girls' hatred for Priya increases.
A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
Matsuda makes the Kira investigation more difficult for the Task Force when he gets himself captured by the Yotsuba corporation.