The Big Bang Theory (2007)
The Big Bang Theory (2007)
Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

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2x01 The Bad Fish Paradigm

23 September, 2008 4:00 am
Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

2x02 The Codpiece Topology

30 September, 2008 4:00 am
A jealous Leonard reacts to Penny's new guy by rebounding with Leslie Winkle.

2x03 The Barbarian Sublimation

07 October, 2008 4:00 am
Sheldon creates a monster when he introduces Penny to online gaming. Meanwhile, Sheldon disagrees with Leslie Winkle at work.

2x04 The Griffin Equivalency

14 October, 2008 4:00 am
Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

2x05 The Euclid Alternative

21 October, 2008 4:00 am
Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

2x06 The Cooper-Nowitzki Theorem

04 November, 2008 4:00 am
Sheldon and the gang are confused when a young grad student is attracted to him.

2x07 The Panty Piñata Polarization

11 November, 2008 4:00 am
When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate. Meanwhile, Howard and Rajesh try to find the house where all the models from "America's Top Model" are staying.

2x08 The Lizard-Spock Expansion

18 November, 2008 4:00 am
Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

2x09 The White Asparagus Triangulation

25 November, 2008 4:00 am
Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

2x10 The Vartabedian Conundrum

09 December, 2008 4:00 am
Leonard asks Penny for advice when his new relationship starts moving too fast.

2x11 The Bath Item Gift Hypothesis

16 December, 2008 4:00 am
Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

2x12 The Killer Robot Instability

13 January, 2009 4:00 am
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.

2x13 The Friendship Algorithm

20 January, 2009 4:00 am
Sheldon creates a scientific procedure for making friends.

2x14 The Financial Permeability

03 February, 2009 4:00 am
Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

2x15 The Maternal Capacitance

10 February, 2009 4:00 am
Leonard and Penny are drawn together after a disastrous visit from Leonard's mother.

2x16 The Cushion Saturation

03 March, 2009 4:00 am
A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

2x17 The Terminator Decoupling

10 March, 2009 3:00 am
Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress is on board the train they are taking to San Francisco.

2x18 The Work Song Nanocluster

17 March, 2009 3:00 am
Penny's home business turns into a complete nightmare when Sheldon takes over.

2x19 The Dead Hooker Juxtaposition

31 March, 2009 4:00 am
Penny squares off with a new beautiful female neighbor who may become the building's "new Penny."

2x20 The Hofstadter Isotope

14 April, 2009 4:00 am
When a fellow comic book enthusiast hits on Penny it leads to Leonard and Howard going to a bar's on Ladies' Night.

2x21 The Vegas Renormalization

28 April, 2009 4:00 am
Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny.

2x22 The Classified Materials Turbulence

05 May, 2009 4:00 am
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.

2x23 The Monopolar Expedition

12 May, 2009 4:00 am
The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard.

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