Ben becomes an SQ informant in order to identify a mole selling info. Nick refuses to sign divorce papers. A quiet day turns tragic.

A prime suspect slips through Ben's fingers. Théo's troubles are far from over. Tyler makes a decision about his career.

Nick and Ben give each other the silent treatment while on patrol. Audrey is badly hurt during an ambush, and Ben asks Amélie to care for his brother.

While Nick is dealing with bad news about Harvey, Ben is tasked by his former colleagues to find a mole in Montreal who is informing for gangsters.

Ben receives devastating news about his family. Nick upsets Isabelle when he takes drastic measures to save someone in distress.

The precinct investigates Sergeant Houle’s suicide. Nick and Ben, who know the truth, decide how to proceed while the rest of the team grieves.

Ben catches Nick in a lie. A drug raid brings unexpected results. Caught in the middle of a love triangle, Ben sets some boundaries.

The precinct learns the truth about Houle and Ben’s secret investigation. Hunted from all sides, Nick pursues his personal justice at any cost.

Tyler turns to alcohol to cope with the recent tragedy. Gendron asks for help from Nick, who is dealing with problems of his own.

All officers respond to a major gas leak in a residential area that Nick knows well. Théo slowly starts to reconnect with his parents.

Nick continues to obsess about his ex-partner, and his leave from work to care for his son is interrupted when he and Ben must answer a domestic call

Nick worries about his son. As the mole becomes more active, the SQ puts more pressure on Ben. Audrey takes unnecessary risks during an intervention.

A drug dealer's arrest leads to a complaint against Ben and Nick, whose colleagues have started to resent him. Tyler's old demons awaken.

While resuming his romantic pursuits, Nick gets into an argument with his mother. Ben and Amélie assess their relationship.

Ben is offered the role of acting sergeant. Bérangère and Val respond to a report of a strange object in an alley and make a horrifying discovery.

Tyler struggles during a difficult training activity. Isabelle turns up the pressure on Nick and Ben. Théo sees Sandrine in secret.

Nick and Ben identify a boy involved in a gang fight, but Gendron, for his own reasons, refuses to let them jail the miscreant.

The officers are called to a tragic scene that leaves all of them shaken. Nick and Isabelle find it increasingly difficult to control Théo.

When Nick and Ben go with Tyler and Bérangère to question suspects in a gang rape case, Tyler makes a mistake that puts the entire team in danger.

Nick and Ben arrest a famous comedian for driving while intoxicated. Ben impresses with his terrific sharpshooting, and Bérangère finds a girlfriend.

Vince finds himself in trouble after a routine police call. Ben becomes suspicious of Nick, whose anger at Isabelle continues to escalate.

While Nick and Ben testify in the prostitution case, Gendron takes control of Station 19. The team organizes a Christmas party for the local children.

While Ben tries to improve his working relationship with his partner, Capt. Gendron pressures him to provide detailed reports on Nick.

Nick and Ben’s explanation regarding the sex trafficking ring leaves Isabelle increasingly suspicious. Meanwhile, Houle’s daughter pays them a visit.

Isabelle tries to dissuade Nick from letting Harvey live with him after he's released from the hospital. Ben takes a few days off to go home.