The Big Bang Theory - 4x10 - The Alien Parasite Hypothesis
2010-12-09
Comedy / Romance
Jim Parsons - Sheldon Cooper , Johnny Galecki - Leonard Hofstadter , Kaley Cuoco - Penny
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
25
TV-14