Episode 4: With two bodies in the morgue, Theo and Diana make a discovery that connects Sinead and Ronan to a historical case known as the Mountain Murders. The team must question if they have a copycat-or if the serial killer has returned.
Cast
Starring: Richard Flood, Acushla-Tara Kupe, Carolyn Bracken, Vanessa Rare, Wayne Hapi, Scott Wills, Liam Carney, Matt Whelan, Manu Bennett, Michelle Fairley.