"The Sinner" is a psychological thriller television series that premiered in 2017. Each season features a different storyline centered around a crime, exploring the motivations behind the actions of the main character. The show is based on the novel by Petra Hammesfahr and stars Bill Pullman as Detective Harry Ambrose, who investigates the cases. The series delves into complex themes such as trauma, memory, and the human psyche. It has received critical acclaim for its writing, performances, and ability to engage viewers in unraveling the mysteries behind each character's behavior.