Series 2, episode 4
Billing:
Evidence suggests the Mountain Murderer is back and responsible for the latest killing, leaving a trail of breadcrumbs for Diana and Richter, who close in on a very unlikely suspect.
Synopsis:
A spiralling Sinead reaches breaking point, worrying her mother, as she seeks vigilante justice at the Backpacker’s Hostel, while Aileen confronts Derry’s widow. When the killer leaves clues for the team that led them to a sacred place, they need to heal past wounds and – with the help of the community – pursue the lead. A new, unlikely suspect emerges.