Quinn Martin, to be perfectly blunt, ran into a streak of bad luck in the mid-70's.
With Streets of San Francisco doing well on ABC, and Cannon & Barnaby Jones in the top 20 on CBS, Martin proved he still had a Midas touch. Unfortunately, even the best are prone to clunkers. His first sale to NBC, Banyon, was a bust, and the only other QM series NBC gained came after the studio'd been sold to Taft Broadcasting, making it a sister company to Hanna-Barbera. And, like Banyon, Tales of the Unexpected & A Man Called Sloane lasted but one year each.
Over at ABC, Martin had bombed out headlining Burt Reynolds in Dan August, but in the winter of 1976, he tried out another Bert---Bert D'Angelo: Superstar, about an egotistical cop (Paul Sorvino) who wasn't in the mold of your typical Martin cops. Superstar lasted six months (February-July) before being given the boot. By that point, Martin had long been usurped by Aaron Spelling as the go-to producer for crime drama at ABC.
No episodes are available on YouTube, which tells you how obscure this series is. However, it wouldn't be the last sale to ABC. All we have is a promo, narrated by studio announcer Ernie Anderson:
No rating. Never saw the show.