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This might finally be the year we learn Penny's last name on "The Big Bang Theory" - HelloGigglesHelloGiggles
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Penny's 'Big Bang Theory' Secret: You'll Never Know Her Last Name, Steve Molaro Says | HuffPost Entertainment
Big Bang EPs Debunk Popular Internet Theory That Penny's Last Name Was Revealed in This Season 2 Scene
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The Big Bang Theory's Kaley Cuoco Wants Penny's Last Name Revealed And Elevator Fixed In Final Season
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