The show was a one-hour adventure/drama about mercenary and vigilanteJon Sable (Lewis Van Bergen), who by day was children's book author Nicholas Fleming. The program ran on Saturdays at 8:00, and aired its final episode on January 2, 1988. Rene Russo had her first television role on the series. Lara Flynn Boyle also had one of her first acting roles playing a kidnapped girl in the series pilot.