The Big Bang Theory

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The Big Bang Theory - S9 Ep. 17
PG | Comedy

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Air Date: Tue 13 Jan 2026

The gang convinces Sheldon to celebrate his birthday and throw him a party.

Episodes

Episodes

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S9 Ep. 17 - The Celebration Experimentation

The gang convinces Sheldon to celebrate his birthday and throw him a party.

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S9 Ep. 18 - The Application Deterioration

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.

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S9 Ep. 19 - The Solder Excursion Diversion

Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Meanwhile, Raj sells out Leonard and Howard after they lie to their wives in order to attend an early screening of a movie.

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