Season 1 PBS , 1982 Season 2 PBS , 1983 Season 3 PBS , 1984 Season 4 PBS , 1984 - 1985 Season 5 PBS , 1986 Season 6 PBS , 1987 Season 7 PBS , 1988 Season 8 PBS , 1989 Season 9 PBS , 1990 Season 10 PBS , 1991 Season 11 PBS , 1992 - 1993