نظرية الانفجار العظيم - Season 12 Episode 12 الحلقة 12 Smart is the new sexy.
نظرة عامة: Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.