| The Big Bang Theory - S04E10 - The Alien Parasite Hypothesis.avi|
Plot Summary: Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
Release Date: 2010-12-09
Directors: Chuck Lorre,Bill Prady
Writers: Chuck Lorre,Bill Prady
Starcast: Johnny Galecki,Jim Parsons,Kaley Cuoco