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The Big Bang Theory Season 3 Episode 22 : The Staircase Implementation
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Title:The Big Bang Theory
Genre: Comedy
Air Date: 2010-05-17
Season Number: 3
Episodes Number: 22
Overview: Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
Stars: Jim Parsons (Sheldon Cooper), , Johnny Galecki (Leonard Hofstadter), , Kaley Cuoco (Penny), , Simon Helberg (Howard Wolowitz), , Kunal Nayyar (Rajesh Koothrappali),