The Big Bang Theory The Application Deterioration (Season 9, Episode 18)
TV-14
TV Episode | 19 min | Comedy, Romance

Primary photo for The Application Deterioration

The Big Bang Theory

The Application Deterioration (Season 9, Episode 18)

TV-14

TV Episode | 19 min | Comedy, Romance

Leonard, Sheldon, and Howard run into problems when they file for a patent for their infinite persistence gyroscope. Meanwhile, the girls give Raj dating advice when Emily reaches out to him after their breakup.

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Cast	+ Add Cast
10 cast members

Name	Known for
Johnny Galecki Leonard Hofstadter Leonard Hofstadter See fewer	The Big Bang Theory (2007)
Jim Parsons Sheldon Cooper Sheldon Cooper See fewer	The Big Bang Theory (2007)
Kaley Cuoco Penny Hofstadter Penny Hofstadter See fewer	The Big Bang Theory (2007)
Simon Helberg Howard Wolowitz Howard Wolowitz See fewer	Florence Foster Jenkins (2016)
Kunal Nayyar Raj Koothrappali Raj Koothrappali See fewer	The Big Bang Theory (2007)
Mayim Bialik Amy Farrah Fowler Amy Farrah Fowler See fewer	Beaches (1988)
Melissa Rauch Bernadette Rostenkowski Bernadette Rostenkowski See fewer	The Big Bang Theory (2007)
Laura Spencer Emily Sweeney Emily Sweeney See fewer	Character (2012)
Alessandra Torresani Claire Claire See fewer	The Big Bang Theory (2007)
Jim Holmes Tim Tim See fewer	Father Stu (2022)