THE BIG BANG THEORY “The Alien Parasite Hypothesis” Season 4 Episode 10 - Preview

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

Watch a sneak peek and check out photos of the upcoming episode ofTHE BIG BANG THEORY Season 4 Episode 10 titled "The Alien Parasite Hypothesis" which airs on Thursday December 9 at 8pm on CBS.

 Episode Synopsis: Amy finds she has sexual feelings for Penny’s ex, while Koothrappali and Wolowitz try to prove who would be the better superhero, on THE BIG BANG THEORY, Thursday, Dec. 9 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

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