Guest Star: Emily Happe

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  The Cooper-Nowitzki Theorem
  Season 2, Episode 6 - Aired November 3, 2008

  When a young grad student, Ramona Nowitzki, falls for Sheldon, the whole gang is confused - nobody more so than Sheldon. Though Sheldon is initially pleased to be the subject of someone's adoration, he is soon searching for a way out of their "relationship".

  Appeared as Kathy