« Il est glaçant, sadique, macabre. » Zachary Jeff'Ossen Ross, un tueur en série dans la même veine meurtrière que Norman Bates. J'ai un trouble du dédoublement de la personnalité. J'ai la conviction qu'on est deux à vivre dans ma tête, deux individus distincts. Moi, le bon gars, citoyen irréprochable ; et lui, ce psychopathe dont j'entends la voix et dont je vois le reflet démoniaque dans le miroir. Il me sourit. Il hante mon esprit...

Police close in on Niko's prostitution ring, but can Laure track the "Butcher" down?

Police strive to connect the elusive leader of Niko's prostitution ring and the infamous "Butcher."

Rachid is dead, causing problems for both Karlsson and the police.

Maya escapes from prison with Alexandre's help. Their plan becomes clear when Camille wakes up in a coffin six feet under, with a live video feed playing at the Institute. But that's only the start of the deadly game between the Balthazar brothers.

On the run in Marrakesh, Balthazar feels responsible for the murders committed by his brother, Alexandre. Upon learning that Camille, Delgado, and Olivia have been suspended for not catching a criminal terrorizing Paris, Balthazar returns to help.

Laure and her team are on the hunt for the missing father and son in the double murder case.

An online clue leads the team to the anarchists' squat, but during a raid Riffaut escapes.

Captain Laure Berthaud leads an investigation into a shocking double murder of a woman and a girl.

Kolabi is taken into custody and Roban attends a mystery meeting with Prosecutor Machard.