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Watch The Big Bang Theory Season 9 Episode 18 Online

  • 7.9/10
  • COUNTRIES: United States of America
  • Subtitles: English

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.