All Available Season All Season Season 1 Nov, 1973 26 episodes 0.0 Season 2 Jan, 1975 13 episodes 0.0 Season 3 Jan, 1977 13 episodes 0.0 Season 4 Jan, 1978 7 episodes 0.0 Season 5 May, 1978 6 episodes 0.0 Season 6 Jan, 1979 6 episodes 0.0 Season 7 Apr, 1980 7 episodes 0.0