The Sinner

Season 1

TV-MA

91%87%

A young mother, overcome by an inexplicable fit of rage, commits a startling act of violence and to her horror has no idea why. An investigator finds himself obsessed with uncovering the woman's buried motive. Together they travel a harrowing journey into the depths of her psyche and the violent secrets hidden in her past.

Where to Watch The Sinner • Season 1

8 Episodes

Part I
E1
Part IAn unassuming housewife stabs a beachgoer to death, which sparks an investigation and creates confusion in a small town.
Part II
E2
Part IIA fractured mother enters a surprise guilty plea to halt a murder investigation, but an obstinate detective uncovers deep systemic lies in her past while a specific song triggers a violent, subconscious physical reaction.
Part III
E3
Part IIIAmbrose investigates Cora after violent incidents and psychiatric evaluation raises doubts about her drug use history while family trauma and suppressed memory emerge, pushing her toward confession and deeper uncertainty.
Part IV
E4
Part IVA fractured woman undergoes hypnotic regression to unearth a buried trauma from a fateful holiday weekend, while an obsessive detective follows a trail of missing women and a vigilante husband pursues his own dangerous leverage.
Part V
E5
Part VA decomposed body unearthed in the woods forces a captive woman to confront a secondary murder charge, while an obsessive detective follows trail logs to an elite club masking predatory, systematic ritual.
Part VI
E6
Part VIWhen Ambrose begins to waver, Cora convinces him to take a risk for the case.
Part VII
E7
Part VIIAn invalid younger sister uses emotional blackmail to crash her older sibling's planned escape with a drug-dealing boyfriend, leading them both into a shadowy, hedonistic trap at an isolated forest estate.
Part VIII
E8
Part VIIIInvestigation into Cora Tannetti's past culminates as repressed trauma surfaces, revealing a concealed death, abduction, and conspiracy that reshape responsibility and lead to reduced sentencing and institutional placement.