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Lisa is Stephanie Barnett's roommate. She is mentioned by Stephanie and Leonard in the episode "The Lizard-Spock Expansion".

After Stephanie has started a relationship with Leonard and broken up with Howard, (though it is questionable that she ever seriously considered him), Howard is outraged. Stephanie later sets Howard up with her roommate Lisa so that Howard would forgive her and Leonard. Howard had only one date with Lisa.

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