“The Thespian Catalyst” — Sheldon hopes acting lessons from Penny will help him become a better teacher, while Koothrappali (Kunal Nayyar, left) fantasizes about his best friend’s girlfriend (Melissa Rauch, right), on THE BIG BANG THEORY, Thursday, Feb. 3 (8:00-8:31 PM, ET/PT) on the CBS Television Network.
Photo: Sonja Flemming/CBS
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