Season 2

S02E01 – The Bad Fish Paradigm

Penny's first date with Leonard goes awry; Penny finds Sheldon to be an ...
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S02E02 – The Codpiece Topology

A jealous Leonard reacts to Penny's new guy by rebounding with Leslie. The ...
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S02E03 – The Barbarian Sublimation

Sheldon creates a monster when he introduces Penny to online gaming. The Big ...
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S02E04 – The Griffin Equivalency

Raj gets an inflated ego and makes a play for Penny after being ...
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S02E05 – The Euclid Alternative

Leonard and his friends stage an intervention to force Sheldon to face his ...
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S02E06 – The Cooper-Nowitzki Theorem

Sheldon and the gang are confused when a young grad student is attracted ...
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S02E07 – The Panty PiƱata Polarization

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides ...
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S02E08 – The Lizard-Spock Expansion

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of ...
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S02E09 – The White Asparagus Triangulation

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent ...
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S02E10 – The Vartabedian Conundrum

Leonard asks Penny for advice when his new relationship starts moving too fast ...
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S02E11 – The Bath Item Gift Hypothesis

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by ...
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S02E12 – The Killer Robot Instability

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for ...
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S02E13 – The Friendship Algorithm

Sheldon creates a scientific procedure for making friends. The Big Bang Theory S02E13 ...
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S02E14 – The Financial Permeability

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and ...
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S02E15 – The Maternal Capacitance

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother ...
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S02E16 – The Cushion Saturation

A paintball game leads to a fight between Sheldon and Penny, and romance ...
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S02E17 – The Terminator Decoupling

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress ...
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S02E18 – The Work Song Nanocluster

Penny's home business turns into a complete nightmare when Sheldon takes over. The ...
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S02E19 – The Dead Hooker Juxtaposition

Penny squares off with a new beautiful female neighbor who may become the ...
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S02E20 – The Hofstadter Isotope

A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard ...
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S02E21 – The Vegas Renormalization

Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes ...
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S02E22 – The Classified Materials Turbulence

Penny's second date with Stuart sees her making a comment that gives Leonard ...
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S02E23 – The Monopolar Expedition

The guys' plan to work over the summer at the North Pole makes ...
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