The sinner

A young mother tries to find out what's causing her to have violent tendencies.

1. Part I

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An unassuming housewife stabs a beachgoer to death, which sparks an investigation and creates confusion in a small town.
2. Part II

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Cora tries to block Ambrose's continuing investigation, while Mason struggles to come to terms with secrets from Cora's past.
3. Part III

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Ambrose unearths a startling secret about Cora that changes the course of the investigation; Mason takes matters into his own hands.
4. Part IV

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With Ambrose's help, Cora struggles to recover missing memories, which lead Ambrose to a new suspect.
5. Part V

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After a body is discovered in the woods, the investigation into Cora's past deepens.
6. Part VI

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When Ambrose begins to waver, Cora convinces him to take a risk for the case.
7. Part VII

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Cora finally remembers the night in question.
8. Part VIII

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Cora's fate is determined.

1. Part I

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A troubled detective returns to his hometown to investigate why a young boy would kill his parents.
2. Part II

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Ambrose and Heather begin to unravel where Julian is from. Julian is thrust into a new world.
3. Part III

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Heather makes a startling realization about Marin. Vera and Julian are dealt a hard blow.
4. Part IV

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Ambrose returns to Mosswood to confront Vera about the commune's work.
5. Part V

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As Ambrose zeroes in on a new suspect, a rift develops between him and Heather.
6. Part VI

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Vera reveals Mosswood's past to Ambrose, leading to a turn in Julian's case.
7. Part VII
8. Part VIII

1. Part I

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Detective Ambrose investigates a tragic yet suspicious car accident on the outskirts of Dorchester.
2. Part II

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Ambrose looks into Jamie and Nick's relationship before the crash. Jamie begins to unravel.
3. Part III

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Ambrose investigates Jamie's past. Leela gives birth. Jamie's anxiety reaches a breaking point.
4. Part IV

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Ambrose pursues Jamie through New York City and tries to prevent another homicide.
5. Part V

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Ambrose urges the NYPD to investigate Jamie for a new crime. Jamie struggles to salvage his life.
6. Part VI

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Jamie pays Sonya a surprise visit. Ambrose goes to extreme lengths to get a confession.
7. Part VII

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After a major turn in the case, Ambrose's tactics are scrutinized.
8. Part VIII

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Jamie seeks vengeance, putting him on a collision course with Ambrose.