June 25, 1957: Sam leaps into Al Calavicci to prevent the passing of his married lover. But when Sam accidentally alters history, and finds out too late about her untimely demise, it could mean the gas chamber for Al and disturbingly a whole new situation at Project Quantum Leap.

Quantum Leap Season 4 Episodes...

• s04e01 - The Leap Back
• s04e02 - Play Ball
• s04e03 - Hurricane
• s04e04 - Justice
• s04e05 - Permanent Wave
• s04e06 - Raped
• s04e07 - The Wrong Stuff
• s04e08 - Dreams
• s04e09 - A Single Drop of Rain
• s04e10 - Unchained
• s04e11 - The Play's the Thing
• s04e12 - Running for Honor
• s04e13 - Temptation Eyes
• s04e14 - The Last Gunfighter
• s04e15 - A Song for the Soul
• s04e16 - Ghost Ship
• s04e17 - Roberto!
• s04e18 - It's a Wonderful Leap
• s04e19 - Moments to Live
• s04e20 - The Curse of Ptah-Hotep
• s04e21 - Stand Up
• s04e22 - A Leap for Lisa

Quantum Leap Show Summary

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.