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This season, Leonard gets a girl. So does Sheldon. Howard drives the Mars Rover into a ditch. Raj woos a terminator. Gorgeous girl-next-door Penny falls under the spell of Age of Conan. And super-smart, ueberconfident Leslie Winkler reduces mere men to spineless jellyfish.
Afleveringen
1The Bad Fish Paradigm22 sep 2008 · 22mPenny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
2The Codpiece Topology29 sep 2008 · 21mA jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
3The Barbarian Sublimation6 okt 2008 · 21mSheldon creates a monster when he introduces Penny to online gaming.
4The Griffin Equivalency13 okt 2008 · 21mRaj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
5The Euclid Alternative20 okt 2008 · 20mLeonard and his friends stage an intervention to force Sheldon to face his fear of driving.
6The Cooper-Nowitzki Theorem3 nov 2008 · 21mSheldon and the gang are confused when a young grad student is attracted to him.
7The Panty Piñata Polarization10 nov 2008 · 21mWhen Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
8The Lizard-Spock Expansion17 nov 2008 · 20mLeonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
9The White Asparagus Triangulation24 nov 2008 · 21mSheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
10The Vartabedian Conundrum8 dec 2008 · 21mLeonard asks Penny for advice when his new relationship starts moving too fast.
11The Bath Item Gift Hypothesis15 dec 2008 · 21mPenny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
12The Killer Robot Instability12 jan 2009 · 21mPenny'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.
13The Friendship Algorithm19 jan 2009 · 21mSheldon creates a scientific procedure for making friends.
14The Financial Permeability2 feb 2009 · 21mSheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
15The Maternal Capacitance9 feb 2009 · 21mLeonard and Penny are drawn together after a disastrous visit from Leonard's mother.
16The Cushion Saturation2 mrt 2009 · 21mA paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
17The Terminator Decoupling9 mrt 2009 · 21mLeonard, 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.
18The Work Song Nanocluster16 mrt 2009 · 20mPenny's home business turns into a complete nightmare when Sheldon takes over.
19The Dead Hooker Juxtaposition30 mrt 2009 · 20mPenny squares off with a new beautiful female neighbor who may become the building's "new Penny."
20The Hofstadter Isotope13 apr 2009 · 20mA fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
21The Vegas Renormalization27 apr 2009 · 22mLeonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
22The Classified Materials Turbulence4 mei 2009 · 19mPenny'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.
23The Monopolar Expedition11 mei 2009 · 21mThe guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.