Season 1 CBS , 1948 - 1949 Season 2 CBS , 1949 - 1950 Season 3 CBS , 1950 - 1951 Season 4 CBS , 1951 - 1952 Season 5 CBS , 1952 - 1953 Season 6 CBS , 1953 - 1954 Season 7 CBS , 1954 - 1955 Season 8 CBS , 1955 - 1956 Season 9 CBS , 1956 - 1957 Season 10 CBS , 1957 - 1958