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The Big Bang Theory

Season 2

Episode 20: The Hofstadter Isotope

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Episode 20

The Hofstadter Isotope

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The Big Bang Theory Season 2 Episode 20 - The Hofstadter Isotope

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April 13, 2009

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

April 13, 2009

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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Recap: "The Hofstadter Isotope"

Apr 14, 2009

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