Main Cast
Seasons
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Season 1
3 episodes
1968
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Season 2
4 episodes
1969
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Season 3
4 episodes
1970
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Season 4
4 episodes
1971
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Season 5
4 episodes
1972
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Season 6
5 episodes
1973
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Season 7
4 episodes
1974
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Season 8
5 episodes
1975
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Season 9
4 episodes
1976
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Season 10
4 episodes
1977
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Season 11
4 episodes
1978
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Season 12
4 episodes
1979
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Season 13
2 episodes
1980