The Best Episodes of The Big Bang Theory Season 2

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: Eric Kaplan, Richard A. Rosenstock

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Peter Chakos

Writer: N/A

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

Director: Mark Cendrowski

Writer: Steven Molaro

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.

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

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.

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A

Sheldon creates a scientific procedure for making friends.

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: David Goetsch

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.

Director: Mark Cendrowski

Writer: N/A

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

Director: Mark Cendrowski

Writer: N/A