Season 1 NBC , 1988 - 1989 Season 2 NBC , 1989 - 1990 Season 3 NBC , 1990 - 1991 Season 4 NBC , 1991 - 1992 Season 5 NBC , 1992 - 1993 Season 6 NBC , 1993 - 1994 Season 7 NBC , 1994 - 1995