The Big Bang Theory Season 1 Episode 8 : The Grasshopper Experiment
Raj introduces his parents, Dr. V.M. Koothrappali and Mrs. Koothrappali (Brian George and Alice Amter), via webcam to his friends. However, Raj immediately becomes overwhelmed after his parents try to arrange a date with Lalita Gupta (Sarayu Rao), a childhood friend and dental student, as he cannot talk to women. Meanwhile, Penny takes up bar tending for some extra money. As she practices mixing drinks with the guys, they discover that after drinking an alcoholic beverage, Raj can actually talk to women. Howard pretends to be Raj and sets up the date with Lalita. They decide the date should be at Penny's restaurant, so she and the guys can keep an eye on Raj's behavior while drinking.