Quantum Leap is an American science-fiction television series, created by Donald P. Bellisario, that originally aired on NBC for five seasons, from March 25, 1989 through May 5, 1993. It stars Scott Bakula as Dr. Sam Beckett, a physicist who leaps through spacetime during experiments in time travel, by temporarily taking the place of other people to correct what he believes were historical mistakes. Dean Stockwell co-stars as Admiral Al Calavicci, Sam's womanizing, cigar-smoking companion and best friend, who appears to him as a hologram and shapes his opinions of the past.
