Season 1 NBC , 1962 - 1963 Season 2 NBC , 1963 - 1964 Season 3 NBC , 1964 - 1965 Season 4 NBC , 1965 - 1966 Season 5 NBC , 1966 - 1967 Season 7 NBC , 1969 Season 8 NBC , 1969 - 1970 Season 9 NBC , 1970 - 1971