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Go BackThe Big Bang Theory Season 4

The Big Bang Theory - Season 4 Episode 10

The Alien Parasite Hypothesis

Release Date: Dec 9, 2010

Season 04, Episode 10 The Alien Parasite Hypothesis

S04 E10

Dec 9, 2010
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Episode Description

Amy finds she has sexual feelings for Penny's ex-boyfriend Zack, while Raj and Howard try to prove who would be the better superhero.

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