The Sinner - Episode Guide

Season 1

Part I

Episode: 1x01 | Airdate: Aug 2, 2017

Part I

A housewife stabs a beachgoer to death, which sparks an investigation and creates confusion in a small town.

Part II

Episode: 1x02 | Airdate: Aug 9, 2017

Part II

Cora tries to block Ambrose's investigation; Mason struggles to come to terms with secrets from Cora's past.

Part III

Episode: 1x03 | Airdate: Aug 16, 2017

Part III

Ambrose uncovers a secret about Cora that changes the course of the investigation; Mason takes matters into his own hands.

Part IV

Episode: 1x04 | Airdate: Aug 23, 2017

Part IV

Cora tries to recover missing memories with Ambrose's help; Ambrose discovers a new suspect.

Part V

Episode: 1x05 | Airdate: Aug 30, 2017

Part V

After the discovery of a body in the woods, more questions arise.

Part VI

Episode: 1x06 | Airdate: Sep 6, 2017

Part VI

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

Part VII

Episode: 1x07 | Airdate: Sep 13, 2017

Part VII

Cora finally remembers the night in question.

Part VIII

Episode: 1x08 | Airdate: Sep 20, 2017

Part VIII

Cora's fate is determined.

Season 2

Part I

Episode: 2x01 | Airdate: Aug 1, 2018

Part I

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

Part II

Episode: 2x02 | Airdate: Aug 8, 2018

Part II

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

Part III

Episode: 2x03 | Airdate: Aug 15, 2018

Part III

Heather makes a startling realization about Marin; Vera and Julian are dealt a hard blow.

Part IV

Episode: 2x04 | Airdate: Aug 22, 2018

Part IV

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

Part V

Episode: 2x05 | Airdate: Aug 29, 2018

Part V

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

Part VI

Episode: 2x06 | Airdate: Sep 5, 2018

Part VI

Vera reveals Mosswood's past to Ambrose, leading to a turn in Julian's case.

Part VII

Episode: 2x07 | Airdate: Sep 12, 2018

Part VII

Heather and Ambrose search for Julian.

Part VIII

Episode: 2x08 | Airdate: Sep 19, 2018

Part VIII

Heather and Ambrose continue their search for Julian as Marin's past is unraveled.