The entire squad is embroiled in an intensely tragic school shooting with consequences that will profoundly impact all of their lives.

Nick and Ben discover the truth behind Amelia's death.

The squad works during a full moon. Suarez and Beatrice receive unexpected news. The squad works to prevent a tragedy.

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.

With the mole on the run, a devastated squad turn on each other, and on themselves.

An accidental death leads violent protesters to occupy an abandoned building.

The squad escapes to a cottage for the weekend, where alcohol and the intimate setting lead to conflict.

Ben's troubles become public, Nick faces a crisis and Dulac gets in over his head.

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.

Nick and Ben will be forever changed by a tragedy caused by a misunderstanding.

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

Guilt ridden Officer Nick Barron returns to work following a deadly shooting; Ben Chartier's transfer to Station 19 from Québec's rural police force turns rocky after a split-second decision triggers an internal investigation.

A showdown between rival street gangs goes terribly wrong, leaving Ben’s life in danger. Squad 19 gathers at Marie’s for the Sergeant’s party and Isabelle discovers Nick may have feelings for someone else.

The squad returns to normal duty. Nick keep secrets as he pursues his cousin's killer.

The city cuts public sector pensions, pitting the squad against their own.

Nick butts heads with J.M when they are assigned patrol together. Beatrice embarks on a new romance.

A wannabe mobster has a tempting proposition for Nick.

The squad waits for findings from a task force into Sergeant Houle’s case. Nick and Ben find themselves at the centre of the fractured squad, the only partnership that has endured. On the job, the squad face a horrific accident that puts multiple lives in danger.

Ben returns home to Morin Heights when his father goes missing. Nick and Martine make a deal.

The first of the month brings “Welfare Day” to 19 – Nick and Ben handle an array of belligerent civilians; the day caps off with a cataclysmic domestic disturbance.

Nick and Ben deal with the aftermath of a tragedy. Nick's lies threaten to drive them apart.

Ben's actions bring repercussions. Ben and Nick seek justice for a raped prostitute and encounter someone they both never thought they'd see again. A new officer joins 19. The squad finds out something disturbing about one of their own.