A cover-up comes back to haunt Nick and Ben, pitting them against Gendron. Nick's frustrations mount when Ben encroaches on his personal life.

Nick and Ben clash over a politically explosive DUI. Ben secretly starts seeing Amelie. Nick handles teenage rebellion. Squad 19 is pulled into a big raid.

An amber alert ripples through 19. After realising he's been shutting Audrey out, Nick makes a strong commitment to her. Ben continues to date Amelie without telling Nick, adding another stress to their partnership.

The squad is devastated when one of their own is brutally assaulted and left clinging to life, causing personal vendettas to collide with protocol in the aftermath.

In the climactic season finale, Nick receives devastating news and struggles to contain his explosive response. A surprise visitor lands in Ben's life, forcing him to make some very hard decisions.

The season launches with an explosive police action that will profoundly impact the squad.

In the aftermath of the school shooting, the squad copes with the trauma as it affects them in ways they never expected.

After the arrest of a misunderstood homeless man and the retrieval of a runaway, Nick and Ben realise that not everyone can be saved.

Nick and Ben draw the squad into a simmering feud with a squad of firemen. Small mistakes have permanent consequences.

Amelie takes a chance on Ben, while Nick and Isabelle receive shocking news about Theo.

The hunt for the mole takes a dramatic shift when Nick is pulled off patrol.