All Available Season All Season Specials Jan, 0001 5 episodes 0.0 Season 1 Sep, 1969 25 episodes 7.2 Season 2 Sep, 1970 24 episodes 0.0 Season 3 Sep, 1971 23 episodes 0.0 Season 4 Sep, 1972 23 episodes 6.0 Season 5 Sep, 1973 22 episodes 1.0