All Available Season All Season Specials Jan, 2007 2 episodes 0.0 Season 1 Jan, 1974 8 episodes 0.0 Season 2 Jan, 1975 8 episodes 0.0 Season 3 Jan, 1976 6 episodes 0.0 Season 4 Nov, 1976 8 episodes 0.0 Season 5 Oct, 1977 6 episodes 0.0 Season 6 Oct, 1978 7 episodes 8.0 Season 7 Oct, 1980 6 episodes 7.5 Season 8 Jul, 1981 7 episodes 7.7
