Sheldon doesn't take it well when his university parking spot is reassigned on The Big Bang Theory. "The Parking Spot Escalation" is the ninth episode of the show's sixth season.
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Howard and Raj make it their mission to figure out where Sheldon is headed on The Big Bang Theory. "The 43rd Peculiarity" is the eighth episode of the show's sixth season.
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Sheldon gets caught in the middle between Amy and Will Wheaton on The Big Bang Theory. "The Habitation Configuration" is the seventh episode of the show's sixth season.
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Sheldon gets into an argument with Stephen Hawking over a game of Words With Friends on The Big Bang Theory. "The Extract Obliteration" is the sixth episode of the show's sixth season.
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Wolowitz and Bernadette celebrate Halloween by dressing up as Smurfs on The Big Bang Theory. "Holographic Excitation" is the fifth episode of the show's sixth season.
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Game night turns into a messy battle of the sexes on The Big Bang Theory. "Re-Entry Minimization" is the fourth episode of the show's sixth season.
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There are unexpected consequences when Sheldon hires a new assistant on The Big Bank Theory. "The Higgs Boson Observation" is the third episode of the show's sixth season.
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Sheldon tries to intervene when he discovers a secret about Penny and Leonard on The Big Bang Theory. "The Decoupling Fluctuation" is the second episode of the show's sixth season.
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TBBT Quotes

Mrs. Cooper: Shelly! I'm so glad you're here!
Sheldon: I saw you having naked sex.

Penny: I give up, he's impossible
Sheldon: I can't be impossible, I exist. I believe what you meant to say is, "I give up, he's improbable."