The Big Bang Theory · SEASON 4

The Alien Parasite Hypothesis

Episode 10 · 2010-12-09

★ 7.4
The Big Bang Theory poster
Season 4Episode 10★ 7.4/10
  • Comedy

Episode overview

Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

20 minutes

Season 4 episodes