The Big Bang Theory Season 9 Episode 18
The Application Deterioration
Episode Description: The Application Deterioration
The Big Bang Theory Season 9 Episode 18 Watch Online - 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.
