Stingray (1986)

Ray is a shadowy character with a mysterious 'secret agent' past. People in trouble often come to him for help, since he has a lot of important and powerful contacts. He refuses to be paid for his services; however, those seeking his assistance must promise him a favor. Some time in the future, Ray will come to them and ask to collect on that favor, giving them some task that is often arduous and/or dangerous. The title of the show comes from the vintage Corvette Stingray that Ray drives.