Season 1 ITV1 , 1973 Season 2 ITV1 , 1973 Season 3 ITV1 , 1977 - 1978 Season 4 ITV1 Season 5 ITV1 Season 7 ITV1 , 1975 Season 9 ITV1 , 1976 - 1977 Season 10 ITV1 , 1977 Season 12 ITV1 , 1978 Season 13 ITV1 , 1979 - 1980 Season 14 ITV1 , 1980 - 1981
, 1973