The Big Bang Theory - Season 8 Episode 6 : The Expedition Approximation
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.
Alternative Titles: 天才理论传, Big Bang Theory, Hamapats hagadol, תאוריית המפץ הגדול, Enfejare Bozorg, ビッグバン★セオリー, La teoría del Big Bang, Štreberi, Teoria vel'keho tresku, Büyük Patlama Teorisi