"Line of Duty" is a British police procedural television series that first aired in 2012. The show focuses on the work of AC-12, a fictional anti-corruption unit within the West Midlands Police. Each season follows a different case involving police misconduct, with a strong emphasis on the investigation process and the moral dilemmas faced by the officers. The series is known for its complex characters, intricate plots, and suspenseful storytelling. It features a range of characters, including Detective Superintendent Ted Hastings, Detective Inspector Kate Fleming, and Detective Constable Steve Arnott, who work together to uncover corruption within the police force.