The Big Bang Theory Season 9 Episode 18

The Big Bang Theory Season 9 Episode 18

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.

Episode Title: The Application Deterioration

Air Date: 2016-03-10

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