TV Shows/The Big Bang Theory/Season 4/S04E10
S04E10 – The Alien Parasite Hypothesis
S04E10
7.4/ 1009 Dec 201020 min

The Alien Parasite Hypothesis

The Big Bang Theory – Season 4

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

Cast

Johnny Galecki

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Kaley Cuoco

Penny

Simon Helberg

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Melissa Rauch

Bernadette Rostenkowski

Mayim Bialik

Mayim Bialik

Amy Farrah Fowler

Brian Thomas Smith

Brian Thomas Smith

Zack Johnson

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