Episode
The Big Bang Theory: The Alien Parasite Hypothesis
Overview
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
Details
- Series
- The Big Bang Theory
- Season
- Season 4
- Episode
- Episode 10
- Air date
- 2010-12-09
- Runtime
- 20 min
Episode context
The Alien Parasite Hypothesis is Episode 10 in Season 4 of The Big Bang Theory. It aired on 2010-12-09. The runtime is 20 min.
Previous / Next
Episode 9: The Boyfriend Complexity
Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.
Episode 11: The Justice League Recombination
The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
More episodes from this season
Episode 8: The 21-Second Excitation
While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
Episode 12: The Bus Pants Utilization
Leonard's idea for a smartphone app derails his friendship with Sheldon.
Episode 7: The Apology Insufficiency
Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.
Episode 13: The Love Car Displacement
Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
Episode 6: The Irish Pub Formulation
Leonard keeps an affair a secret from Sheldon, Howard and Raj.
Episode 14: The Thespian Catalyst
Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.
Episode 5: The Desperation Emanation
Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.
Episode 15: The Benefactor Factor
A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
Episode 4: The Hot Troll Deviation
An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
Episode 16: The Cohabitation Formulation
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.