Main Cast
Seasons
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Season 1
11 episodes
1977
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Season 2
11 episodes
1978
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Season 3
11 episodes
1979
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Season 4
11 episodes
1980
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Season 5
12 episodes
1981
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Season 6
12 episodes
1982
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Season 7
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Season 8
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Season 9
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Season 10
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Season 11
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Season 12
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Season 13
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Season 14
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Season 15
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Season 16
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Season 17
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Season 18
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Season 19
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Season 20
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Season 21
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