The Alien Parasite Hypothesis

The Big Bang Theory — Season 4

Amy finds she has sexual feelings for Penny’s ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

Information

First Aired On:
Dec 09th, 2010
Writers
Chuck Lorre, Jim Reynolds, Lee Aronsohn, Maria Ferrari, Steve Holland, Steven Molaro
Directors
Mark Cendrowski

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