Koothrappali sells out Leonard and Wolowitz after they lie to their wives. "The Solder Excursion Diversion" is the 19th episode of the show's ninth season.
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The boys run into problems when they file for a patent on The Big Bang Theory. "The Application Deterioration" is the 18th episode of the show's ninth season.
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Wolowitz freaks out when Bernadette announces she's pregnant on The Big Bang Theory. "The Positive Negative Reaction" is the 16th episode of the show's ninth season.
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Howard and Bernadette find a surprise in their hot tub on The Big Bang Theory. "The Valentino Submergence" is the 15th episode of the show's ninth season.
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The boys take fencing lessons and Sheldon ends up in an awkward position with the instructor on The Big Bang Theory. "The Perspiration Implementation" is the fifth episode of the show's ninth season.
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Let's form a band! That's the idea Howard and Raj discuss in this scene from The Big Bang Theory Season 9.
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The boys are must figure out what to do when they get a flat tire on The Big Bang Theory. "The Bachelor Party Corrosion" is the third episode of the show's ninth season.
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The gang looks perplexed at the television screen, and that could mean just about anything. One thing that's for certain? They're all taking in a lot of surprising news in this premiere.
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With Sheldon and Amy on opposite ends, the gang has a serious group chat. How will the dynamics change now that Amy has pressed the pause button on her relationship with Sheldon?
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Steward chats with Bernadette and Howard on The Big Bang Theory.
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Bernadette and Howard are Thrilled on The Big Bang Theory.
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Raj chats with Bernadette and Howard over a meal on The Big Bang Theory.
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TBBT Quotes

Penny: What actor holds the record for being named People magazine's Sexiest Man Alive?
Sheldon: William Shatner!
Leonard: I don't think it's Shatner.
Sheldon: Then it's got to be Patrick Stewart

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.