All Available Season All Season Specials Sep, 1972 3 episodes 0.0 Season 1 Sep, 1972 26 episodes 5.8 Season 2 Sep, 1973 23 episodes 5.9 Season 3 Sep, 1974 23 episodes 6.7 Season 4 Sep, 1975 23 episodes 5.8 Season 5 Sep, 1976 24 episodes 5.8
