The Big Bang Theory Episodes

2007, TV Show

The Big Bang Theory Episode: "The Alien Parasite Hypothesis"

Season 4, Episode 10
Episode Synopsis: Amy is attracted to Penny's ex-boyfriend; and Raj and Howard argue about which of them would be a better superhero.
Original Air Date: Dec 9, 2010
Guest Cast Brian Thomas Smith: Zack
Full Episode
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Season 4, Episode 10
Paid | iTunes
Length: 20:11
Aired: 12/9/2010
Also available on Amazon Instant Video and VUDU
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Premiered: September 24, 2007, on CBS
Rating: TV-PG
User Rating: (8,988 ratings)
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Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated.

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