All Available Season All Season Specials Jan, 0001 5 episodes 0.0 Season 1 Sep, 1969 25 episodes 7.1 Season 2 Sep, 1970 24 episodes 7.3 Season 3 Sep, 1971 23 episodes 7.5 Season 4 Sep, 1972 23 episodes 7.3 Season 5 Sep, 1973 22 episodes 6.9
