Season 1 NBC Watch now Season 1956 NBC , 1956 Season 1957 NBC , 1957 Season 1960 Syndication , 1960 Season 1963 Syndication , 1963 Season 1964 Syndication , 1964 Season 1965 Syndication , 1965 Season 1966 Syndication , 1966 Season 1967 Syndication , 1967 Season 1968 Syndication , 1968