Season 1 BBC One , 1975 Season 2 BBC One , 1976 Season 3 BBC One , 1977 Season 4 BBC One , 1978 Season 5 BBC One , 1979 Season 6 BBC One , 1980 Season 7 BBC One , 1981 Season 8 BBC One , 1982 Season 9 BBC One , 1983
, 1975