The Sinner: Season 4
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of The Sinner Season 3.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Episode Guide
Season 4 Progress Shield
Part I
Oct 13, 2021
Ambrose visits the town of Clark Harbor for a getaway and finds himself at the center of a tragedy.
Part II
Oct 20, 2021
A new suspect leads the investigation into an ongoing feud between the Lams and the Muldoons.
Part III
Oct 27, 2021
Ambrose heads to the mainland to learn more about Percy's past and uncovers dark family secrets.
Part IV
Nov 3, 2021
When the Muldoons push to close the investigation, Ambrose refuses, pushing Sonya to the brink.
Part V
Nov 10, 2021
Ambrose discovers the source of Percy's ritualistic practices and dives deeper into her past.
Part VI
Nov 17, 2021
A shocking new crime further rattles the town of Clark Harbor; Ambrose and Meg team together.
Part VIII
Dec 1, 2021
Ambrose exposes the secret that threw Percy's life off course, setting off widespread consequences.