“The Staircase Implementation” — Leonard (Johnny Galecki, far right) tells Penny about how he, Koothrappali (Kunal Nayyar, second from left) and Wolowitz (Simon Helberg, second from right) met Sheldon (Jim Parsons, far left) for the first time…and what happened to the elevator, on THE BIG BANG THEORY, Monday, May 17 (9:31-10:01 PM, ET/PT) on the CBS Television Network.
Photo: Robert Voets/CBS
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