While Burns' team continue to piece together Olson's murder, Gibson realises that her serial killer is responsible for Annie's attack. Meanwhile, Spector faces questioning by Brinks.
While the investigation into Olson's murder reveals some uncomfortable truths, increased pressure is put on Gibson and her team in their hunt for the serial killer.
While Spector searches for his next target, Stella and Burns are interrupted by the news of the fatal shooting of a police officer.
When Spector takes his next victim, Stella’s fears are confirmed and she takes control of the investigation.
The murder of a brilliant engineer is discovered, just as a shipping magnate arrives in London to acquire a failing English company.
Conal, Eilish Burke's two-year-old son, is abducted and all leads point to his father. Jack's superiors consider the boy is already dead but he thinks differently. Also, Gerry faces charges for corruption and Jack follows a drug traffic trail that may lead him to Conal.moreless
Garda officer Jack Driscoll returns to Connemara to replace his father in his job with the rural police. His first case is to investigate the death of a young barmaid. As the investigation progresses, Jack starts finding hidden secrets within the small town.moreless
An young trophy wife from the Clydeside sailing fraternity is murdered and the victim's husband falls under suspicion, but then two more bodies turn up it is clear they are searching for a different killer. Meanwhile, Burke is reunited with an old flame.moreless