Season 2, Episode 22 The Classified Materials Turbulence
First Aired: May 4, 2009
While on a date with Stuart, Penny makes an unexpected discovery regarding Leonard; and Wolowitz asks for his friends' help on his NASA project when he uncovers a design flaw.
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- Premiered: September 24, 2007
- Rating: TV-PG
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- Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. (more)