The Big Bang Theory: Season 4, Episode 10

The Alien Parasite Hypothesis

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

Writing:
  • Chuck Lorre
  • Bill Prady
  • Adam Faberman

Stars:
Release Date: 2007-09-24
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12
Metacritic: 8.0/10
TMDb: 7.9/10
  • Country: US
  • Language: English
  • Runtime: 22

Other episodes for this season

The Robotic Manipulation
Episode 1 - The Robotic Manipulation
The Cruciferous Vegetable Amplification
Episode 2 - The Cruciferous Vegetable...
The Zazzy Substitution
Episode 3 - The Zazzy Substitution
The Hot Troll Deviation
Episode 4 - The Hot Troll Deviation
The Desperation Emanation
Episode 5 - The Desperation Emanation
The Irish Pub Formulation
Episode 6 - The Irish Pub Formulation
The Apology Insufficiency
Episode 7 - The Apology Insufficiency
The 21-Second Excitation
Episode 8 - The 21-Second Excitation
The Boyfriend Complexity
Episode 9 - The Boyfriend Complexity
The Alien Parasite Hypothesis
Episode 10 - The Alien Parasite Hypothesis
The Justice League Recombination
Episode 11 - The Justice League Recomb...
The Bus Pants Utilization
Episode 12 - The Bus Pants Utilization
The Love Car Displacement
Episode 13 - The Love Car Displacement
The Thespian Catalyst
Episode 14 - The Thespian Catalyst
The Benefactor Factor
Episode 15 - The Benefactor Factor
The Cohabitation Formulation
Episode 16 - The Cohabitation Formulat...
The Toast Derivation
Episode 17 - The Toast Derivation
The Prestidigitation Approximation
Episode 18 - The Prestidigitation Appr...
The Zarnecki Incursion
Episode 19 - The Zarnecki Incursion
The Herb Garden Germination
Episode 20 - The Herb Garden Germinati...
The Agreement Dissection
Episode 21 - The Agreement Dissection
The Wildebeest Implementation
Episode 22 - The Wildebeest Implementa...
The Engagement Reaction
Episode 23 - The Engagement Reaction
The Roommate Transmogrification
Episode 24 - The Roommate Transmogrifi...