The Big Bang Theory
Season 8·EPISODE 06
The Expedition Approximation
WatchedS08 · E06
Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel deep underground. Meanwhile, Leonard and Penny seek advice from Howard and Bernadette after they fight about money.
AIR DATEOct 20, 2014Original broadcast date
RUNTIME21m21 minutes
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