Season 1 ABC , 1960 - 1961 Season 2 ABC , 1961 - 1962 Season 3 ABC , 1962 - 1963 Watch now Season 4 ABC , 1963 - 1964 Watch now Season 5 ABC , 1964 - 1965 Season 6 CBS , 1965 - 1966 Season 7 CBS , 1966 - 1967 Season 8 CBS , 1967 - 1968 Season 9 CBS , 1968 - 1969 Season 10 CBS , 1969 - 1970 Season 11 CBS , 1970 - 1971 Season 12 CBS , 1971 - 1972
, 1960 - 1961
, 1961 - 1962
, 1962 - 1963
, 1963 - 1964
, 1964 - 1965
, 1965 - 1966
, 1966 - 1967
, 1967 - 1968
, 1968 - 1969
, 1969 - 1970
, 1970 - 1971
, 1971 - 1972
