As Iraqi forces attempt to retake Mosul from Isis, Ghaith Abdul-Ahad joins their elite Golden Division on the frontline, speaking with civilians, soldiers and Isis suspects. At constant risk from Isis snipers and suicide bombers, can commander Munthadar and his men ever bring peace to Mosul? And if they do, will the exhausted civilian population trust them? A PBS FRONTLINE production with Mongoose Films in association with The Guardian.