Seasons
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Season 1
4 episodes
1974
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Season 2
4 episodes
1975
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Season 3
4 episodes
1976
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Season 4
3 episodes
1977
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Season 5
5 episodes
1978
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Season 6
2 episodes
1979
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Season 7
3 episodes
1980
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Season 8
4 episodes
1981
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Season 9
4 episodes
1982
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Season 10
2 episodes
1983
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Season 11
4 episodes
1984
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Season 12
3 episodes
1985
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Season 13
2 episodes
1986