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For all practical purposes, Leonard's current girlfriend, Dr. Stephanie Barnett (Sara Rue), has moved into Leonard and Sheldon's apartment, although Leonard doesn't acknowledge this. Meanwhile, Stephanie gives a physical examination to Sheldon who complains about a ringing in his ear. After Penny shows up scantily clad in the guys' apartment, it turns out that neither Leonard nor Sheldon ever told Stephanie about Penny. The morning does not go we...

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