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The Big Bang Theory

Season 2 2008 - 2009

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  • 2008-09-23T01:00:00+01:00 on CBS
  • 22 mins
  • 7 hours, 54 mins (23 episodes)
  • United States
  • English
  • Comedy
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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.

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23 episodes

2x01 The Bad Fish Paradigm

  • Season Premiere

    2008-09-23T01:00:00+01:00 — 21 mins

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

2x02 The Codpiece Topology

  • 2008-09-30T01:00:00+01:00 — 21 mins

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

2x03 The Barbarian Sublimation

  • 2008-10-07T01:00:00+01:00 — 21 mins

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

2x04 The Griffin Equivalency

  • 2008-10-14T01:00:00+01:00 — 21 mins

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

2x05 The Euclid Alternative

  • 2008-10-21T01:00:00+01:00 — 20 mins

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

2x06 The Cooper-Nowitzki Theorem

  • 2008-11-04T01:00:00+00:00 — 21 mins

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

2x07 The Panty Piñata Polarization

  • 2008-11-11T01:00:00+00:00 — 21 mins

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

2x08 The Lizard-Spock Expansion

  • 2008-11-18T01:00:00+00:00 — 20 mins

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

2x09 The White Asparagus Triangulation

  • 2008-11-25T01:00:00+00:00 — 21 mins

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

2x10 The Vartabedian Conundrum

  • 2008-12-09T01:00:00+00:00 — 21 mins

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

2x11 The Bath Item Gift Hypothesis

  • 2008-12-16T01:00:00+00:00 — 21 mins

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

  • 2009-01-13T01:00:00+00:00 — 21 mins

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

  • 2009-01-20T01:00:00+00:00 — 21 mins

Sheldon creates a scientific procedure for making friends.

2x14 The Financial Permeability

  • 2009-02-03T01:00:00+00:00 — 21 mins

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

2x15 The Maternal Capacitance

  • 2009-02-10T01:00:00+00:00 — 20 mins

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

2x16 The Cushion Saturation

  • 2009-03-03T01:00:00+00:00 — 21 mins

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

2x17 The Terminator Decoupling

  • 2009-03-10T00:00:00+00:00 — 21 mins

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.

2x18 The Work Song Nanocluster

  • 2009-03-17T00:00:00+00:00 — 20 mins

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

2x19 The Dead Hooker Juxtaposition

  • 2009-03-31T01:00:00+01:00 — 20 mins

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

2x20 The Hofstadter Isotope

  • 2009-04-14T01:00:00+01:00 — 20 mins

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

2x21 The Vegas Renormalization

  • 2009-04-28T01:00:00+01:00 — 21 mins

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

  • 2009-05-05T01:00:00+01:00 — 18 mins

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

  • 2009-05-12T01:00:00+01:00 — 21 mins

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

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