Arnott and McCoy follow a trail of clues that leads them to a reclusive, elderly woman, Mary (played by Frances Tomelty), who may hold the key to unraveling the corruption. As they interview Mary, they begin to realize that nothing is as it seems, and that even the most seemingly innocent individuals may be hiding secrets.
Meanwhile, we're introduced to Detective Inspector Jack McCoy (played by Michael Mando), a tough, seasoned officer with a complicated past. McCoy is initially resistant to Arnott's probing, but as the investigation unfolds, it becomes clear that he may be more involved than he lets on. line of duty s01 download
As Arnott and McCoy work to verify Conway's claims, they're confronted by the PSNI's Internal Affairs unit, led by the cunning and ruthless Detective Chief Superintendent Brian 'The Muppet' McNeill (played by Peter Mullan). McNeill seems determined to discredit Conway and shut down the investigation. Arnott and McCoy follow a trail of clues