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The Sinner: Part I – Season 4 Premiere (S4EP1 USA Network Wed 13 Oct 2021)



Part I: Ambrose travels to the coast for vacation only to find himself embroiled in the investigation for a missing woman after he sees her walk off a cliff into the ocean waters below, but after authorities search the area, they cannot find her body.

Airdate: Wed 13 Oct 2021 at 22:00 on USA Network

Season 4 Episode 1

A blend of thrilling murder investigation and raw character drama, anthology series The Sinner follows the investigation of a chilling new homicide each season. Detective Harry Ambrose employs unusual tactics and a deep capacity for empathy to solve his cases … with a boundless dedication driven by his own dark past. Departing from the traditional "whodunnit," the series delves into the "why" — exploring the buried traumas, psychological factors and philosophical reasons that might compel a seemingly "normal" person to commit unspeakable acts.