Sheldon is thrilled when Meemaw visits on The Big Bang Theory. "The Meemaw Materialization" is the 14th episode of the show's ninth season.
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Sheldon collaborates with Koothrapalli on a discovery on The Big Bang Theory. "The Sales Call Sublimation" is the 12th episode of the show's ninth season.
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After five years of dating, Amy and Sheldon spend their first night together on The Big Bang Theory. "The Opening Night Excitation" is the 11th episode of the show's ninth season.
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Sheldon has a revelation about a song stuck in his head on The Big Bang Theory. "The Earworm Reverberation" is the tenth episode of the show's ninth season.
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Amy and Sheldon spend Thanksgiving together at the aquarium on The Big Bang Theory. "The Platonic Permutation" is the ninth episode of the show's ninth season.
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Sheldon is interviewed for a Spock documentary on The Big Bang Theory. "The Spock Resonance" is the seventh episode of the show's ninth season.
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Sheldon and Leonard hit the black market looking for helium on The Big Bang Theory. "The Helium Insufficiency" is the sixth 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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Sheldon decides to revert back to life in 2003 on The Big Bang Theory. "The 2003 Approximation" is the fourth episode of the show's ninth season.
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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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Sheldon plans a special episode of "Fun With Flags" after his breakup with Amy on The Big Bang Theory. "The Separation Oscillation" is the second episode of the show's ninth season.
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Sheldon's dealing with a change in his relationship, but hopefully he'll grow from it. It seems like we're in for a somewhat serious premiere with The Big Bang Theory Season 9 Episode 1. Well, probably not too serious...
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TBBT Quotes

I just gave you my virginity, woman. Cool your jets!

Sheldon

(Singing) Thor and Dr Jones, Thor and Dr. Jones. One plays with lightening, the other plays with bones.

Howard and Raj