<P> Quantum Leap is an American science - fiction television series that originally aired on NBC for five seasons , from March 1989 through May 1993 . Created by Donald P. Bellisario , it starred Scott Bakula as Dr. Sam Beckett , a physicist who leaps through spacetime during an experiment in time travel , by temporarily taking the place of other people to correct 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 . </P>
<P> Quantum Leap is an American science - fiction television series that originally aired on NBC for five seasons , from March 1989 through May 1993 . Created by Donald P. Bellisario , it starred Scott Bakula as Dr. Sam Beckett , a physicist who leaps through spacetime during an experiment in time travel , by temporarily taking the place of other people to correct 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 . </P>
how many seasons of quantum leap are there
how many seasons of quantum leap are there
five
five