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Episode guide

S5·E2 The Infestation Hypothesis

Core Aired September 22, 2011

Narrative Classification: Character-defining development exploring origin backstory and emotional depth.

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Synopsis

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

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Frequently Asked Questions

When did Season 5 Episode 2 of The Big Bang Theory air?

Season 5, Episode 2 ('The Infestation Hypothesis') originally aired on September 22, 2011.

How long is Season 5 Episode 2 ('The Infestation Hypothesis')?

The episode follows the standard broadcast runtime for The Big Bang Theory.

What happens in The Big Bang Theory Season 5 Episode 2?

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya....

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