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The Big Bang Theory: 4x10

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.

The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
The Big Bang Theory: 4×10
Dec. 09, 2010