نظرية الانفجار العظيم - Season 12 Episode 18 الحلقة 18 Smart is the new sexy.
نظرة عامة: When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. Also, Halley's fear of the dark causes opportunity and conflict at the Wolowitz home.