Season 1 NBC , 1988 Watch now Season 2 NBC , 1988 - 1989 Watch now Season 3 NBC , 1989 - 1990 Watch now Season 4 NBC , 1990 - 1991 Watch now Season 5 NBC , 1991 - 1992 Watch now Season 6 CBS , 1992 - 1993 Watch now Season 7 CBS , 1993 - 1994 Watch now Season 8 CBS , 1994 - 1995