Season 1 CBS , 1951 - 1961 Season 2 CBS , 1952 - 1963 Season 3 CBS , 1953 - 1954 Season 4 CBS , 1954 - 1955 Season 5 CBS , 1955 - 1956 Season 6 CBS , 1956 - 1957 Season 7 CBS , 1957 - 1958 Season 8 CBS , 1958 - 1959