Season 1 Syndication , 1961 - 1962 Season 2 Syndication , 1962 - 1963 Season 3 Syndication , 1963 - 1964 Season 4 Syndication , 1964 - 1965 Season 5 Syndication , 1956 - 1966 Season 6 Syndication , 1966 - 1967 Season 7 Syndication , 1967 - 1968 Season 8 Syndication , 1968 - 1969 Season 9 Syndication , 1969 - 1970 Season 10 Syndication , 1970 - 1971 Season 11 Syndication , 1971 - 1972 Season 12 Syndication , 1972 - 1973 Season 13 Syndication , 1973 - 1974 Season 14 Syndication , 1974 - 1975 Season 15 Syndication , 1975 - 1976 Season 16 Syndication , 1976 - 1977 Season 17 Syndication , 1977 - 1978 Season 18 Syndication , 1978 - 1979 Season 19 Syndication , 1979 - 1980 Season 20 Syndication , 1980