Season 4 (1980)

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April 5, 1980

Episode 1 of Season 4 premiered on April 5, 1980

2
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April 12, 1980

Episode 2 of Season 4 premiered on April 12, 1980

3
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April 19, 1980

Episode 3 of Season 4 premiered on April 19, 1980

4
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April 26, 1980

Episode 4 of Season 4 premiered on April 26, 1980

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May 3, 1980

Episode 5 of Season 4 premiered on May 3, 1980

6
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May 10, 1980

Episode 6 of Season 4 premiered on May 10, 1980