The Big Bang Theory
S04E1020 min· aired 12/9/2010
The Alien Parasite Hypothesis
TMDb7.4
Overview
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.