The Application Deterioration Season: 9 Episode: 18 Air Date: 2016-03-10
GUEST STARS: Laura Spencer, Alessandra Torresani, Jim Holmes
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.