The transition for large screen to small was still unlearned when "77" was released. Playhouse 90, Live From Carnegie Hall and network sponsored orchestras were still in vogue - serious TV with a performing arts feel. Note the cinema feel to this series. It was filmed, not video taped.
I enjoyed this show as a child as it was intelligent mystery/drama. It was done before secret agents. It required the private investigators to be resourceful. They were alway honest. Just the stuff a boy scout like me needed to round out his masculinity. Stuart Bailey was the smart guy. Older and no-nonsense. Jeff Spencer was the cute guy. And Kookie, well, the only thing good about Kookie were the cars he drove.
Good stuff.