Season 1 NBC , 1982 Season 5 NBC , 1986 Season 6 NBC , 1987 - 1988 Season 7 NBC , 1988 - 1989 Season 8 NBC , 1989 - 1990 Season 9 NBC , 1990 - 1991 Season 10 NBC , 1991 - 1992 Season 11 NBC , 1992 - 1993 Season 12 NBC , 1993