The Hofstadter Isotope 2×20 | Watch The Big Bang Theory Season 2 Episode 20 Full Episode (S02E20)

A Associate comical book enthusiast’s hitting on Penny goes to Leonard and Howard attending a bar’s Ladies’ Night.

Show aired: Apr 13, 2009.

The Big Bang Theory 2×20 videos:

http://www.megavideo.com/?v=1X4XCNKW

http://www.megavideo.com/?v=Z0BM89X0

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