集 23
The Bad Fish Paradigm
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.
展开The Codpiece Topology
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie.
展开The Barbarian Sublimation
Sheldon creates a monster when he introduces Penny to online gaming.
展开The Griffin Equivalency
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.
展开The Euclid Alternative
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.
展开The Cooper-Nowitzki Theorem
Sheldon and the gang are confused when a young grad student is attracted to him.
展开The Panty Piñata Polarization
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate.
展开The Lizard-Spock Expansion
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
展开The White Asparagus Triangulation
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.
展开The Vartabedian Conundrum
Leonard asks Penny for advice when his new relationship starts moving too fast.
展开The Bath Item Gift Hypothesis
Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.
展开The Killer Robot Instability
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.
展开The Friendship Algorithm
Sheldon creates a scientific procedure for making friends.
展开The Financial Permeability
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.
展开The Maternal Capacitance
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.
展开The Cushion Saturation
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.
展开The Terminator Decoupling
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.
展开The Work Song Nanocluster
Penny's home business turns into a complete nightmare when Sheldon takes over.
展开The Dead Hooker Juxtaposition
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."
展开The Hofstadter Isotope
A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night.
展开The Vegas Renormalization
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.
展开The Classified Materials Turbulence
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.
展开The Monopolar Expedition
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.
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