Season 1
ITV Granada 
, 1970
Season 2
ITV Granada , 1971
Season 3
ITV Granada , 1972
Season 4
ITV Granada , 1973
Season 5
ITV Granada , 1974 - 1975
Season 6
ITV Granada , 1975 - 1976
Season 7
ITV Granada , 1977
Season 8
ITV Granada , 1977
Season 9
ITV Granada , 1980
Season 10
ITV Granada , 1982
Season 11
ITV Granada , 1983
Season 12
ITV Granada , 1985
Season 13
ITV Granada , 1987
Season 14
ITV Granada , 1988
Season 15
ITV Granada , 1989
Season 16
ITV Granada , 1990
Season 17
ITV Granada , 1991