With the help of Dr. Sam's companion Albert "Al" Calavicci who appears
as a holographic projection using "imaging chamber", visible and
audible to Sam and also young children, animals and mentally
ill/fatally wounded persons can see and speak with Al. They got the
chance to correct the past and put wrong to right; preventing Al's
first wife Beth to fall in love with other while Al is in Vietnam war,
correct many mistakes and misjudging and even avert tragedies in
ordinary people's lives. Some part of the series where Sam meets the
Evil Leaper telling him ""Who gave you the right to go bungling around
in time, putting right what I made wrong?" while in the last episode
some feel that the bartender Sam meets, portrays God and tells Sam that
his project was messed up for purpose: to change history for better.
Multi-award winning Sci-Fi TV Series Quantum Leap won awards from Emmy,
Golden Globe, Directors Guild of America Award and more, completed 5
seasons with total of 97 episodes, aired from 1989 to 1993, visit
http://www.tvaddicts.tv/movie/sci-fi/Quantum_Leap.html