Quantum Leap - Season 4 - Eps 1: The Leap Back
June 15, 1945: Struck by lightning, Sam and Al find their roles reversed, as Sam returns to the future, and to a long-lost love, while Al leaps back to 1945 to prevent the death of a returning World War II hero and his former girl friend.
About Quantum Leap

Title: Quantum Leap
First Air Date: 1989-03-26
Last Air Date: 1993-05-05
Status: Ended
Rating: 8/10 (from 711 votes)
Language: EN
Seasons: 5
Total Episodes: 97
Network: NBC
Genres: Sci-Fi & Fantasy, Action & Adventure, Drama
Production Companies: Universal Television, Belisarius Productions
Synopsis
Theorizing that one could time travel within his own lifetime, Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished... He woke to find himself trapped in the past, facing mirror images that were not his own and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so Dr. Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap will be the leap home.
Cast

Scott Bakula
Sam Beckett

Dean Stockwell
Al Calavicci