نظرية الانفجار العظيم - Season 8 Episode 6 الحلقة 6 Smart is the new sexy.
نظرة عامة: 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.