![The Big Bang Theory Season 8 Episode 6 The Big Bang Theory Season 8 Episode 6](https://image.tmdb.org/t/p/w185/71669CxKEeyqtItFH6mFHKxPh3y.jpg)
The Big Bang Theory Season 8 Episode 6
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. Leonard and Penny seek advice from Howard and Bernadette after they fight about money.
Serie: The Big Bang Theory
Director: Anthony Joseph Rich, Mark Cendrowski, Nikki Lorre