The Big Bang Theory The Alien Parasite Hypothesis Season 4 Episode 10 - fanaru

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4x10 The Alien Parasite Hypothesis Episode Summary
Aired: Thursday December 9, 2010
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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4x9 The Boyfriend Complexity
Nov 18, 2010

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4x11 The Justice League Recombination
Dec 16, 2010

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