78%
2.7k votes
Rate this episode
What did you think?

520k
watchers
693k
plays
771k
collected
184
lists

The Big Bang Theory: Season 4

4x10 The Alien Parasite Hypothesis
TV-14

Episode

IMDB TMDB

Ads suck, but they help pay the bills. Hide ads with

VIP.

Aired2010-12-10T01:00:00Z on CBS
Runtime20m
DirectorMark Cendrowski

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

Ads suck, but they help pay the bills. Hide ads with

VIP.

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

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
1

Brian Thomas Smith
Zack Johnson

Ads suck, but they help pay the bills. Hide ads with

VIP.

Ads suck, but they help pay the bills. Hide ads with

VIP.

Ads suck, but they help pay the bills. Hide ads with

VIP.

Ads suck, but they help pay the bills. Hide ads with

VIP.

The Big Bang Theory: Season 4

4x10 The Alien Parasite Hypothesis
TV-14

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
1

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Penny

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Amy Farrah Fowler

Brian Thomas Smith

Zack Johnson

Find a TV show or movie

The Big Bang Theory: Season 4

4x10 The Alien Parasite HypothesisTV-14

ActorsAll Cast & Crew

Season Regulars 7

Guest Stars 1

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Penny

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Amy Farrah Fowler

Brian Thomas Smith

Zack Johnson

Find a TV show or movie

4x10 The Alien Parasite Hypothesis
TV-14

Actors
All Cast & Crew

Season Regulars
7

Guest Stars
1