The Big Bang Theory

Season 8 Episode 6

The Expedition Approximation

Aired Thursday 8:00 PM Oct 20, 2014 on CBS
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Episode Summary


Sheldon and Raj undertake an underground research expedition that turns into a test of how long before they get under each other's skin. Meanwhile, Leonard and Penny argue about money, and go to Wolowitz and Bernadette for advice.

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