The Alien Parasite Hypothesis
Run Time: 22 mins
Air Date: Thu, 9 Dec 2010
Average Rating: ⭐ 7.3 (41 votes)
CBSSeason 4 - Episode 10
Average Rating: ⭐ 7.3 (41)
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.