Season 1 CBS Season 6 CBS , 1961 Season 8 CBS , 1962 Season 13 CBS , 1968 Season 20 CBS , 1975 Season 21 CBS , 1976 - 1978 Season 1955 CBS , 1955 Season 1956 CBS , 1956 Season 1976 CBS , 1976 Season 1977 CBS , 1977 Season 1981 CBS , 1981