Season 2

2008-09-22

Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

2008-09-29

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.

2008-10-06

Sheldon creates a monster when he introduces Penny to online gaming.

2008-10-13

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

2008-10-20

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

2008-11-03

Sheldon and the gang are confused when a young grad student is attracted to him.

2008-11-10

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.

2008-11-17

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

2008-11-24

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

2008-12-08

Leonard asks Penny for advice when his new relationship starts moving too fast.

2008-12-15

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

2009-01-12

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for.

2009-01-19

Sheldon creates a scientific procedure for making friends.

2009-02-02

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

2009-02-09

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

2009-03-02

A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

2009-03-09

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

2009-03-16

Penny's home business turns into a complete nightmare when Sheldon takes over.

2009-03-30

Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."

2009-04-13

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.

2009-04-27

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

2009-05-04

Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's working on.

2009-05-11

The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.