Clothing from The Hofstadter Isotope

The Hofstadter Isotope

'The Hofstadter Isotope' - Season 2, Episode 20

When Penny accompanies the guys to the comic book store, she is charmed by store owner Stuart. Leonard wonders why Penny has fallen for a guy who is just as geeky as he is.

Air Date: April 13, 2009.

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