The Big Bang Theory S01E08 - The Grasshopper Experiment (ENG 2007)
One of my favourite comedy series
Koothrappali is overwhelmed after his parents arrange a blind date with a girl from his childhood, as he can not talk to attractive members of the opposite sex. Penny takes up bar tending for some extra money; and as she practices mixing drinks with the guys they discover that after a few drinks Koothrappali can actually talk to women. However on his date at Penny's restaurant (with all the guys watching from the bar), he becomes obnoxious, and the girl ends up leaving with Sheldon after he accidentally complimented her by comparing her to a beautiful Indian fairy tale princess.