I would have to say the one episode that surprised me the most was Shock theater when Sam and Al switched spots. I remember watching Quantum leap during one of my summers when it came on USA at midnight. I always stayed up late purposely just so I could catch QL. I remember seeing that episode for the first time. I did not want to wait until the next night to see it. I wanted to see the next episode right away. My mind was reeling that whole next day as I waited for QL to come on that night.