Season 1 Channel 4 , 2015 Watch now The first series/season focuses on the team's investigation into the serial murders of young girls with Down syndrome. Season 2 Channel 4 , 2017 Watch now The second series/season follows the investigation into Manchester crime boss Nora Attah. Season 3 Channel 4 , 2018 Watch now The six-episode series/season has a political focus, with the main story-line following the attempted murder of a local politician by a far right group.
, 2015
