Michael Mosley (Ozark) is set as a series regular in the upcoming fourth season of USA Network’s crime anthology series The Sinner, starring Bill Pullman.
In Season 4, still reeling from the trauma of a previous case a year ago, the now-retired Harry Ambrose (Pullman) travels to Hanover Island in Northern Maine for a recuperative getaway with his partner, Sonya (Jessica Hecht). When an unexpected tragedy occurs involving 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.