One of the more dramatic Quantum Leap Seasons, Season 4 is mostly set in the 1950's-1960's and has quite a lot of well thought out plot lines (minus the "It's a Wonderful Leap" Episode of course).
All episodes are first rate, and there are no techincal glitches this time.
Bonus features include: A 5th season episode and a documentary on the 1980's.
Overall, 22 of the best hours of tv around. They just don't make television like this anymore folks. Do yourself a favor and purchase this!