7.8 22 Sep 2008

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

7.5 29 Sep 2008

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

7.8 06 Oct 2008

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

7.5 13 Oct 2008

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

7.4 20 Oct 2008

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

7.8 03 Nov 2008

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

7.9 10 Nov 2008

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

7.4 17 Nov 2008

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

7.4 24 Nov 2008

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

7 08 Dec 2008

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

8.1 15 Dec 2008

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

7.4 12 Jan 2009

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.

7.4 19 Jan 2009

Sheldon creates a scientific procedure for making friends.

7.3 02 Feb 2009

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

8.1 09 Feb 2009

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

7.4 02 Mar 2009

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

7.4 09 Mar 2009

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.

7.5 16 Mar 2009

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

7.5 30 Mar 2009

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

7.6 13 Apr 2009

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

7.5 27 Apr 2009

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

7.4 04 May 2009

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.

7.5 11 May 2009

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