To help catch a dangerous killer, a young police officer goes undercover and engages in an intimate relationship with the prime suspect. Niamh Algar, Eddie Marsan, Harry Treadaway, Sion Daniel Young, Rochenda Sandall, Nathaniel Martello-White, Deka Walmsley, Charlie Carter, Rene Costa, El Anthony, Paul O'Kelly Added on BritBox 2021-10-07. Added on Disney 2022-09-03. Added on Netflix 2023-09-01.