The passing of an elderly woman found in a cave has the Lyell team asking what drives a person to cuddle someone so vulnerable. A new boss at the Lyell riles Jack.

Benjamin continues his desperate search for Gloria. Nikki's disturbing discovery joins the dots. A new team member joins the Lyell.

When a man is found bludgeoned by a hammer, the Lyell are drawn deep into a conspiracy involving local government.

After another hammer attack, the Lyell team start uncovering connections to a conspiracy involving local government.

Dismembered body parts take Nikki into the crumbling world of criminal justice. Can the Lyell team find a missing barrister before it's too late?

Nikki conducts an unusual post-mortem, and a terrifying discovery disturbs the team. DNA evidence forces the Lyall to seek advice from an unexpected quarter.