I remember certain episodes of this late-night ABC show, including the one where Clifton Davis owes gangster Moses Gunn money, but sets up a plan to electrocute him instead. I also recall seeing an old TV Guide listing an episode that had Mark Hamill in the cast, although he's not listed here. I also recall the John Astin and Patty Duke episode, made when they were married, which was more of a downer than regular episodes which dealt with crime stories. This one was a more serious drama about an ailing child, with the Astins as social workers.
I also remember a comedy musical version of "Superman", called "It's a Bird, It's a Plane, It's Superman" (which I mistakenly remembered as "Up, Up and Away", that aired in this show's time slot, although it may have been considered a separate special from the series. I recall the cast included Malachi Throne and Al Molinaro (whom I confused at the time with Vic Tayback), with Lesley Ann Warren as Lois Lane and also with Loretta Swit, plus Geoffrey Horne from "River Kwai".