The Big Bang Theory: Season 4

4x10 The Alien Parasite Hypothesis
TV-14

Episode

WritersSteven Molaro (story) + 5 more, Maria Ferrari (teleplay), Steve Holland (story), Jim Reynolds (teleplay), Lee Aronsohn (teleplay), Chuck Lorre (story)
CountryUnited States
LanguagesEnglish
GenresComedy

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

Private Notes