All Available Season All Season Specials Jan, 0001 36 episodes 0.0 Season 1 Nov, 1969 4 episodes 9.0 Season 2 Oct, 1970 5 episodes 8.5 Season 3 Nov, 1971 4 episodes 0.0 Season 4 Oct, 1972 4 episodes 0.0 Season 5 Dec, 1973 4 episodes 0.0 Season 6 Jan, 1975 3 episodes 8.0 Season 7 Dec, 1975 4 episodes 0.0 Season 8 Jan, 1977 3 episodes 0.0 Season 9 May, 1978 1 episodes 0.0 Season 10 Dec, 1978 3 episodes 9.0 Season 11 Feb, 1980 3 episodes 0.0 Season 12 Jan, 1981 3 episodes 0.0 Season 13 Jan, 1982 2 episodes 0.0 Season 14 Jan, 1983 2 episodes 0.0 Season 15 Jan, 1984 2 episodes 0.0 Season 16 Jan, 1985 3 episodes 0.0 Season 17 Mar, 1986 3 episodes 0.0 Season 18 Jan, 1988 2 episodes 0.0 Season 19 Feb, 1989 3 episodes 0.0
