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Eps20 The Big Bang Theory Season 2 Episode 20

The Big Bang Theory Season 2 Episode 20
The Big Bang Theory Season 2 Episode 20
Season 2
Episode: 20
Air Date: 2009-04-13

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

Episode Title: The Hofstadter Isotope
Serie: The Big Bang Theory
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