Guest Star: Kevin Brief

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  The Einstein Approximation
  Season 3, Episode 14 - Aired February 1, 2010

  When Sheldon's struggle with a physics problem keeps him awake for days on end, he decides to free his mind by taking a menial job. After failing to find gainful employment anywhere else, Sheldon starts work at the Cheesecake Factory with Penny.

  Appeared as Glen