# S3-Scientific Breakthroughs

By [Big Bang Theory Fans](https://dylit.info/user/bigbangtheoryfans)

[Big Bang Theory](https://dylit.info/presence/Big-Bang-Theory/69442e7d871bdbf5e05799b4) > [S3-Scientific Breakthroughs](https://dylit.info/channel/S3-Scientific-Breakthroughs/6963dcc891dd956ce475f807)

Episode 22: The Staircase Implementation When the elevator breaks down yet again, Leonard tells Penny the origin story of how he first met Sheldon and moved into the building, revealing the disastrous experiment that permanently destroyed the elevator. The flashback shows the early roommate agreement negotiations and how Leonard came to accept Sheldon’s eccentricities in exchange for friendship and scientific opportunity.