Episode guide
The Sinner: Season 4
8 episodes · premiered Oct 13, 2021
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.
- Episode 1: Part I Oct 13, 2021 · 54m · TMDB 6.8 Ambrose visits the town of Clark Harbor for a getaway and finds himself at the center of a tragedy.
- Episode 2: Part II Oct 20, 2021 · 45m A new suspect leads the investigation into an ongoing feud between the Lams and the Muldoons.
- Episode 3: Part III Oct 27, 2021 · 45m Ambrose heads to the mainland to learn more about Percy's past and uncovers dark family secrets.
- Episode 4: Part IV Nov 3, 2021 · 46m When the Muldoons push to close the investigation, Ambrose refuses, pushing Sonya to the brink.
- Episode 5: Part V Nov 10, 2021 · 47m Ambrose discovers the source of Percy's ritualistic practices and dives deeper into her past.
- Episode 6: Part VI Nov 17, 2021 · 45m A shocking new crime further rattles the town of Clark Harbor; Ambrose and Meg team together.
- Episode 7: Part VII Nov 24, 2021 · 43m Unsure whom to trust, Ambrose hunts down his pursuers.
- Episode 8: Part VIII Dec 1, 2021 · 57m Ambrose exposes the secret that threw Percy's life off course, setting off widespread consequences.