All Available Season All Season Season 1 May, 1971 6 episodes 0.0 Season 2 Feb, 1972 10 episodes 0.0 Season 3 Jan, 1973 10 episodes 0.0 Season 4 Jan, 1974 10 episodes 0.0 Season 5 Jan, 1975 10 episodes 0.0 Season 6 Jan, 1976 10 episodes 0.0 Season 7 Jan, 1977 10 episodes 0.0 Season 8 Jan, 1978 10 episodes 0.0 Season 9 Jan, 1979 10 episodes 0.0 Season 10 Jan, 1980 10 episodes 0.0 Season 11 Jan, 1981 10 episodes 0.0 Season 12 Jan, 1982 10 episodes 0.0 Season 13 Jan, 1983 10 episodes 0.0 Season 14 Jan, 1984 10 episodes 0.0 Season 15 Jan, 1985 10 episodes 0.0 Season 16 Jan, 1986 7 episodes 0.0 Season 17 Jul, 2011 29 episodes 0.0 Season 18 Sep, 2013 10 episodes 0.0
