
Back to The Sinner
Season 4
8 Episodes2021
Still reeling from the trauma of a previous case a year ago, the now-retired Harry Ambrose travels to Hanover Island in northern Maine for a recuperative getaway with his partner Sonya, but when an unexpected tragedy occurs involving Percy Muldoon, the daughter of a prominent island family, Ambrose is recruited to help the investigation, only to be thrown into a mystery of mounting paranoia that will turn this sleepy tourist island, and Ambrose’s life, upside down.
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Episodes (8)

Ep 1
Part I
★6.7
2021-10-13•54m
Ambrose visits the town of Clark Harbor for a getaway and finds himself at the center of a tragedy.

Ep 2
Part II
★7.5
2021-10-20•45m
A new suspect leads the investigation into an ongoing feud between the Lams and the Muldoons.

Ep 3
Part III
★7.5
2021-10-27•45m
Ambrose heads to the mainland to learn more about Percy's past and uncovers dark family secrets.

Ep 4
Part IV
★7.5
2021-11-03•46m
When the Muldoons push to close the investigation, Ambrose refuses, pushing Sonya to the brink.

Ep 5
Part V
★7.9
2021-11-10•47m
Ambrose discovers the source of Percy's ritualistic practices and dives deeper into her past.

Ep 6
Part VI
★8.0
2021-11-17•45m
A shocking new crime further rattles the town of Clark Harbor; Ambrose and Meg team together.

Ep 7
Part VII
★8.0
2021-11-24•43m
Unsure whom to trust, Ambrose hunts down his pursuers.

Ep 8
Part VIII
★7.7
2021-12-01•57m
Ambrose exposes the secret that threw Percy's life off course, setting off widespread consequences.