The Big Bang Theory: Season 2

Leonard becomes concerned when his date with Penny ends abruptly and she starts blowing him off. When told the truth, Sheldon would rather move out than keep Penny's reasons a secret from Leonard.

Sheldon is annoyed when Leonard turns to Leslie for comfort after seeing Penny with another guy.

Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.

The guys struggle to cope with Raj's arrogance after he is featured in a People magazine article.

Sheldon annoys the gang when Leonard can't drive him to and from work, so they try to teach him how to drive.

Sheldon is flattered when a graduate student takes a shine to him, however her extreme devotion becomes too much to handle.

Penny plans revenge when Sheldon bans her from his and Leonard's apartment, while Howard and Raj use the latest technology to try to find the house being used in "America's Next Top Model."

Leonard and Howard's friendship is jeopardised when Leonard steals a girl from Howard.

Sheldon believes that Leonard will wreck his relationship with Stephanie, so he decides to take matters into his own hands.

Leonard tries to slow down his relationship with Stephanie when he realizes that they are living together, while Sheldon becomes convinced that he has an untraceable disease.

Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.

Howard becomes depressed after Penny makes a cruel statement about his love life, while the rest of the guys prepare for a grudge killer robot duel against an obnoxious colleague at the university.

Sheldon tries to make friends with Kripke in the hope that it will get him access to a coveted computer at the university.

Leonard and Sheldon try to help out Penny when she can't afford to pay her rent.

Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.

Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on the couch.

On a train to San Francisco, Howard, Raj and Leonard fight for the affections of sci-fi star Summer Glau, while Sheldon is forced to turn to Penny for help when he leaves his flash drive behind.

Sheldon's assistance with Penny's home-based business leads to chaos.

Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.

Leonard is upset when the owner of the comic book store goes on a date with Penny, so he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.

After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj. Meanwhile, Penny is forced to take in Sheldon after he locks himself out of his apartment.

Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.

Penny gets upset when she finds out Leonard and the guys plan to work at the North Pole for the summer.