Is Sheldon getting the smackdown from his own students? We've got a fun clip from tonight's hilarious episode of "The Big Bang Theory"!
On tonight's episode, "The Thespian Catalyst," Sheldon (Jim Parsons) hopes acting lessons from Penny (Kaley Cuoco) will help him become a better teacher. Meanwhile, Koothrappali (Kunal Nayyar) fantasizes about his best friend's girlfriend. That can't be good, can it?
Watch "The Big Bang Theory" tonight at 8 p.m. ET/PT on CBS.