Watch The Big Bang Theory Online

TV-14 CBS 22m 2006 8.3

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The Big Bang Theory

A woman who moves into an apartment across the hall from two brilliant but socially awkward physicists shows them how little they know about life outside of the laboratory.


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The Big Bang Theory Full Episodes

S2 E1: The Bad Fish Paradigm

Aired: September 22nd, 2008 @ 7:00 PM CST

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


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S2 E2: The Codpiece Topology

Aired: September 29th, 2008 @ 7:00 PM CST

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


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S2 E3: The Barbarian Sublimation

Aired: October 6th, 2008 @ 7:00 PM CST

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


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S2 E4: The Griffin Equivalency

Aired: October 13th, 2008 @ 7:00 PM CST

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


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S2 E5: The Euclid Alternative

Aired: October 20th, 2008 @ 7:00 PM CST

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


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S2 E6: The Cooper-Nowitzki Theorem

Aired: November 3rd, 2008 @ 7:00 PM CST

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


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S2 E7: The Panty Piñata Polarization

Aired: November 10th, 2008 @ 7:00 PM CST

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


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S2 E8: The Lizard-Spock Expansion

Aired: November 17th, 2008 @ 7:00 PM CST

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


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S2 E9: The White Asparagus Triangulation

Aired: November 24th, 2008 @ 7:00 PM CST

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


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S2 E10: The Vartabedian Conundrum

Aired: December 8th, 2008 @ 7:00 PM CST

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


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S2 E11: The Bath Item Gift Hypothesis

Aired: December 15th, 2008 @ 7:00 PM CST

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


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S2 E12: The Killer Robot Instability

Aired: January 12th, 2009 @ 7:00 PM CST

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.


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S2 E13: The Friendship Algorithm

Aired: January 19th, 2009 @ 7:00 PM CST

Sheldon creates a scientific procedure for making friends.


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S2 E14: The Financial Permeability

Aired: March 2nd, 2009 @ 7:00 PM CST

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


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S2 E15: The Maternal Capacitance

Aired: February 9th, 2009 @ 7:00 PM CST

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


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S2 E16: The Cushion Saturation

Aired: May 2nd, 2009 @ 7:00 PM CST

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


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S2 E17: The Terminator Decoupling

Aired: March 9th, 2009 @ 7:00 PM CST

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.


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S2 E18: The Work Song Nanocluster

Aired: March 16th, 2009 @ 7:00 PM CST

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


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S2 E19: The Dead Hooker Juxtaposition

Aired: March 30th, 2009 @ 7:00 PM CST

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


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S2 E20: The Hofstadter Isotope

Aired: April 13th, 2009 @ 7:00 PM CST

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


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S2 E21: The Vegas Renormalization

Aired: April 27th, 2009 @ 7:00 PM CST

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


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S2 E22: The Classified Materials Turbulence

Aired: May 4th, 2009 @ 7:00 PM CST

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.


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S2 E23: The Monopolar Expedition

Aired: May 11th, 2009 @ 7:00 PM CST

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


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