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The Big Bang Theory: Season 4

4x10 The Alien Parasite Hypothesis
TV-14

Episode

IMDB TMDB

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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

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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

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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