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.
#2 – The Leap Home (2): Vietnam
Season 3 – Episode 2
April 7, 1970: As a Navy SEAL in his own brother’s squad, Sam must determine whether he is there to save Tom’s life or ensure the success of the mission on which his brother was killed. Also Al from 1970 was a P.O.W.
The episode was rated from 101 votes.
#3 – Shock Theater
Season 3 – Episode 22
October 3, 1954: Leaping into Sam Bederman, a mental patient who is suffering from acute depression, Sam receives an overloaded electroshock treatment, which causes his Swiss-cheesed memory to be replaced by personas from previous leaps. Al, finding himself visible to the mentally absent, must try to complete Sam’s mission, and convince him to take another shock treatment, in order to leap Sam out before contact is lost forever.
The episode was rated from 56 votes.
#4 – Trilogy (3): The Last Door
Season 5 – Episode 10
July 28, 1978: Sam is an aging lawyer, recruited by Abigail, now thirty-three, to defend her when she is put on trial for the murder of Leta Aider, the woman whose daughter Abigail was accused of killing almost twenty-five years earlier.
The episode was rated from 40 votes.
#5 – Mirror Image
Season 5 – Episode 22
August 8, 1953: Sam lands in a not-so-ordinary bar in a coal-mining town, where strange things are happening and familiar people don’t know him. With the help of another Al, he still has something to set right … or is there more than one thing he needs to change?
The episode was rated from 96 votes.
#6 – Jimmy
Season 2 – Episode 8
October 14, 1964: Since mainstreaming the mentally retarded is not yet a popular concept, Sam must help Jimmy LaMotta, the “slow” young man he’s leaped into, get a job and gain his coworkers’ acceptance, to prevent his brother from returning Jimmy to the institution.
The episode was rated from 88 votes.
#7 – So Help Me God
Season 2 – Episode 9
July 29, 1957: Though he can’t remember much more than habeas corpus, Sam finds himself the defense attorney for a young black woman accused of murdering the son of the most powerful man in a small Louisiana town.
The episode was rated from 93 votes.
#8 – Lee Harvey Oswald (1)
Season 5 – Episode 1
October 5, 1957 – November 22, 1963: As a result of leaping again before he had a chance to complete his original mission, Sam finds himself leaping back and forth through the life of Lee Harvey Oswald. Following the sole assassin theory, Sam and Al attempt to prevent Oswald’s attack on John F. Kennedy. But, with each leap giving Oswald more control over Sam’s body, history seems doomed to repeat itself.
The episode was rated from 45 votes.
#9 – Good Morning, Peoria
Season 2 – Episode 6
September 9, 1959: Rock ‘n’ roll is about to become big, but not in Peoria. That is, unless Sam, as DJ Howlin’ Chick Howell, can manage to keep the radio station where he’s employed from being shut down by overly conservative town elders.
The episode was rated from 98 votes.
#10 – The Leap Back
Season 4 – Episode 1
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 girlfriend.
The episode was rated from 66 votes.