Guest Star: Judy Greer

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  The Plimpton Stimulation
  Season 3, Episode 21 - Aired May 10, 2010

  The gang is surprised to hear Sheldon is having a female guest stay over. Although Sheldon's interest in his guest is purely academic, Dr. Elizabeth Plimpton invites a different kind of attention when she meets Leonard, Howard and Raj.

  Appeared as Dr. Elizabeth Plimpton