The Big Bang Theory Season 4 Episode 10

The Big Bang Theory → Season 4 → Episode 10: The Alien Parasite Hypothesis
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
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Watch The Alien Parasite Hypothesis
Air Date: 9 December 2010
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Runtime: 0 Minutes
More Info: IMDb

Cast: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar


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