Airwolf was a totally different show to Knight Rider--look at the main characters: Stringfellow Hawke was reclusive, sensitive, and a loner. Yes, Michael Knight was a "young loner on a crusade...", but he was hardly reclusive. I can see where you might think that Knight Rider was a spinoff of Airwolf, but they were two completely different shows. If anything, Airwolf was intended as a spinoff of Magnum, P.I. (Another Donald P. Bellisario creation, the same man who created Airwolf.)
Thanks, Hobie Harkins! I loved that episode...and not to nit, but Hobie's line was, "He's got two men headed for the gravel pit right now, with enough explosives in that car to blow it higher than I am!" (I'm watchin' it right now.)