The Big Bang Theory

The Big Bang Theory

The Alien Parasite Hypothesis (4x10)


Air date: Dec 09, 2010

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

  • Premiered: Sep 2007
  • Episodes: 279
  • Followers: 54,4k
  • Ended
  • CBS
  • Thursday at 20