"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 typically follows a different case involving police misconduct, with the unit investigating officers suspected of corruption. The series is known for its intricate plots, strong character development, 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 the truth behind various criminal activities within the police force.