The Big Bang Theory (2007)

The Big Bang Theory (2007) : 8x6

The Expedition Approximation 22 Min.
7.113 40 votes

Overview

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.