Season 3, Episode 22 The Staircase Implementation
First Aired: May 17, 2010
Leonard tells Penny the story of how he met Sheldon.
Cast & Details See all »
- Premiered: September 24, 2007
- Rating: TV-PG
- Premise: Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show's popularity expanded, thanks to breakout star Jim Parsons, along with the… (more)