Season 2, Episode 18 The Work Song Nanocluster

First Aired: March 16, 2009

Penny starts a hair-product business that suffers when her friends, particularly Sheldon, become involved.

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  • Premiered: September 24, 2007
  • Rating: TV-PG
  • User Rating:4.58 out of 5 (8,996 ratings)
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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)

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