The Big Bang Theory Season 3 Episode 10
Penny gets help from Sheldon in order to understand what Leonard’s work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend.
The Big Bang Theory Season 3 Episode 9
After he’s humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette.
The Big Bang Theory Season 3 Episode 8
With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
The Big Bang Theory Season 3 Episode 7
A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism.
The Big Bang Theory Season 3 Episode 6
Sheldon becomes Leonard’s teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj’s friendship.
The Big Bang Theory Season 3 Episode 5
After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz.
The Big Bang Theory Season 3 Episode 4
Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as a third wheel.
The Big Bang Theory Season 3 Episode 3
Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification.
The Big Bang Theory Season 3 Episode 2
Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket.
The Big Bang Theory Season 3 Episode 1
When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens…
The Big Bang Theory Season 2 Episode 23
The guys’ plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
The Big Bang Theory Season 2 Episode 22
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…
The Big Bang Theory Season 2 Episode 21
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
The Big Bang Theory Season 2 Episode 20
A fellow comic book enthusiast’s hitting on Penny leads to Leonard and Howard going to a bar’s Ladies’ Night.
The Big Bang Theory Season 2 Episode 19
Penny squares off with a new beautiful female neighbor who may become the building’s “new Penny.”
The Big Bang Theory Season 2 Episode 17
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.
The Big Bang Theory Season 2 Episode 16
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
The Big Bang Theory Season 2 Episode 15
Leonard and Penny are drawn together after a disastrous visit from Leonard’s mother.
The Big Bang Theory Season 2 Episode 14
Sheldon’s solution to Penny’s financial difficulty leads to a confrontation between Leonard and Penny’s ex-boyfriend.
The Big Bang Theory Season 2 Episode 13
Sheldon creates a scientific procedure for making friends.
The Big Bang Theory Season 2 Episode 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.
The Big Bang Theory Season 2 Episode 11
Penny starts dating Leonard’s handsome colleague; Leonard and his friends are tortured by Sheldon’s obsession with gift-giving etiquette.
The Big Bang Theory Season 2 Episode 10
Leonard asks Penny for advice when his new relationship starts moving too fast.
The Big Bang Theory Season 2 Episode 9
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon’s stringent standards.
The Big Bang Theory Season 2 Episode 8
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
The Big Bang Theory Season 2 Episode 7
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
The Big Bang Theory Season 2 Episode 6
Sheldon and the gang are confused when a young grad student is attracted to him.
The Big Bang Theory Season 2 Episode 5
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
The Big Bang Theory Season 2 Episode 4
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
The Big Bang Theory Season 2 Episode 3
Sheldon creates a monster when he introduces Penny to online gaming.
The Big Bang Theory Season 2 Episode 2
A jealous Leonard reacts to Penny’s new guy by rebounding with Leslie.
The Big Bang Theory Season 2 Episode 1
Penny’s first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
The Big Bang Theory Season 1 Episode 17
Penny’s break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date.
The Big Bang Theory Season 1 Episode 16
Penny wants to throw a surprise party for Leonard, but Sheldon’s indulgence at an electronics store throws her off-track.
The Big Bang Theory Season 1 Episode 15
The rest of the gang fall for Sheldon’s twin sister, and Leonard’s plan to win her heart is derailed when Sheldon declares he’ll be the one to decide who can…
The Big Bang Theory Season 1 Episode 14
When delivery of another collectible leads to Penny’s lashing out at Leonard, he decides it’s time to give up his habit, much to his friends’ protestation.
The Big Bang Theory Season 1 Episode 13
Sheldon finds himself booted from the gang’s Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he’s superior.
The Big Bang Theory Season 1 Episode 12
With Sheldon rattled over meeting Dennis, a 15-year-old physicist who’s smarter than he, Leonard helps him look for a way to debunk Dennis’s research.
The Big Bang Theory Season 1 Episode 11
With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn’t a clue what she’s in for.
The Big Bang Theory Season 1 Episode 10
Leonard and Sheldon each lie to avoid seeing Penny’s concert, but Sheldon’s is a bit too complicated for his own good.