The Big Bang Theory S9E18 · The Application Deterioration

The Big Bang Theory

Season 9 · Episode 18 · The Application Deterioration · 18 min

Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating advice when Emily reaches out to him after their breakup.