Season 1 PBS , 1980 Season 2 PBS , 1981 Season 3 PBS , 1982 - 1983 Season 4 PBS , 1984 Season 5 PBS , 1984 - 1985 Season 6 PBS , 1985 - 1986 Season 7 PBS , 1986 - 1987 Season 8 PBS , 1987 - 1988 Season 9 PBS , 1988