Season 1 NBC , 1950 Season 2 NBC , 1950 - 1951 Season 3 NBC , 1951 - 1952 Season 4 NBC , 1952 - 1953 Season 5 NBC , 1953 - 1954 Season 6 NBC , 1954 - 1955 Season 7 NBC , 1955 - 1956 Season 8 NBC , 1956 - 1957 Season 9 CBS , 1957 - 1958 Season 10 CBS , 1958 - 1959 Season 11 CBS , 1959 - 1960 Season 12 CBS , 1960 - 1961 Season 13 CBS , 1961 - 1962 Season 14 CBS , 1962 - 1967