(1966-1967) Years before he was the weary, legally war-torn District Attorney of Law and Order, Steven Hill was head of the most versatile spy team on sixties television: master of disguise (and slight-of-hand expert) Martin Landau, electronics genius Greg Morris, muscleman Peter Lupus, and femme fatale Barbara Bain, with new agents brought in to supplement the core team every episode. The mix of cold-war spy thriller and caper adventure lasted seven seasons, with Peter Graves taking the reigns from Hill in the second season.