All Available Season All Season Season 1 Jul, 1973 13 episodes 0.0 Season 2 Dec, 1974 19 episodes 0.0 Season 3 Dec, 1975 13 episodes 0.0 Season 4 May, 1976 6 episodes 0.0 Season 5 Aug, 1976 7 episodes 0.0 Season 6 Dec, 1976 10 episodes 0.0