1. The Penitent, Part 1

When a man is thrown from a high-rise building, the team is propelled into the criminal underworld of a notorious mafia group, the Ndrangheta.

2. The Penitent, Part 2

Nikki becomes even more involved with the Ndrangheta mafia-group, and Jack uncovers some disturbing leads.

3. Familiar Faces, Part 1

An abandoned lorry is found at a quarry with several dead and dying people in the back.

4. Familiar Faces, Part 2

The Lyell team works together to find out why the lorry was found with bodies inside and a dead driver at the wheel.

5. Star, Part 1

The Lyell team are thrown into the dark side of social media, where nothing is as it seems.

6. Star, Part 2

The investigation remains full of surprising twists and turns, with Nikki managing to get behind the mask of the main suspect.

7. Heart of Darkness, Part 1

Leveling-up leaders and environmental activists clash in a small town trying to look to the future.

8. Heart of Darkness, Part 2

The Lyell team return to the crime scene as another victim is in peril.

9. Southbay, Part 1

Jack comes to the aid of an old friend and is sucked into a difficult case where he's pitted against his former mentor.

10. Southbay, Part 2

The local CID suffers from a difference in opinion as evidence mounts against the accused police officer.