Two detectives with opposing viewpoints are forced to work together in a pre-apocalyptic criminal world.
Cast: Jim Sturgess, Agyness Deyn, Nikki Amuka-Bird, Derek Riddell, Jojo Macari, Varada Sethu, Owain Arthur, Joplin Sibtain, Adrian Rawlins, Lorraine Burroughs, Aisling Bea, David J Biscoe, Cameron King, Ukweli Roach, Kae Alexander, Tamara Smart, Daniel Coonan, Richard Coyle, Dermot Crowley, Maggie Daniels, Clive Myrie, Glenn Webster
An internet killer is targeting people who believe they wish to die and Mooney thinks he knows how to trap him. Renko and Hicks change tactic and bring the fight to Grace's door.
The murder of a jogger has dire personal implications for Renko but she pretends it is a routine investigation. Hicks makes a startling revelation about the Alex Butler murder.
London is under siege as Blackwood's killing spree escalates and Father Dennis becomes a public pariah. Meanwhile, Hicks has deduced where Renko has hidden the Hard Sun flash-drive.
A murderer confesses to a priest that he wants to challenge God into revealing Himself by targeting those people who help others. Grace makes an offer to Hicks.
Renko persuades a newspaper to publish the Hard Sun dossier. The government shuts the story down, but Renko and Hicks must investigate a killer for whom the "Hard Sun Hoax" is very real.
An unruly police detective is immediately suspicious of his new partner, but during their first investigation together they stumble upon a secret that binds them together for life as they find proof that the world is going to end.