Sheldon Cooper has many quirks on The Big Bang Theory, including knocking thrice on somebody's door. Here's the reason why he ...
From saying Bazinga to singing Soft Kitty to Sheldon's schedule, we ranked "The Big Bang Theory's" running jokes from ...
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10 Best 'The Big Bang Theory' Quotes, Ranked
The Big Bang Theory is one of the most beloved modern sitcoms ever created. It tailors to a wide range of audiences, from comic book lovers to science fanatics to those who may never even have picked ...
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