The Big Bang Theory

2007•7 series•Entertainment / Drama
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Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?

The Terminator Decoupling: Episode Image
Episode 17The Terminator Decoupling

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.(S02,E17)

The Work Song Nanocluster: Episode Image
Episode 18The Work Song Nanocluster

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.(S02,E18)

The Dead Hooker Juxtaposition: Episode Image
Episode 19The Dead Hooker Juxtaposition

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.(S02,E19)

The Hofstadter Isotope: Episode Image
Episode 20The Hofstadter Isotope

A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.(S02,E20)

The Vegas Renormalization: Episode Image
Episode 21The Vegas Renormalization

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.(S02,E21)

The Classified Materials Turbulence: Episode Image
Episode 22The Classified Materials Turbulence

Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.(S02,E22)

The Monopolar Expedition: Episode Image
Episode 23The Monopolar Expedition

The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.(S02,E23)

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