Guilt ridden Officer Nick Barron returns to work following a deadly shooting.
A showdown between rival street gangs goes terribly wrong, leaving Ben’s life in danger.
The first of the month brings “Welfare Day” to 19 – Nick and Ben handle an array of belligerent civilians.
Tyler botches a takedown of a gang of rapists that nearly costs Nick his life, and leaves Ben to question Tyler's fitness on the job.
Nick butts heads with J.M when they are assigned patrol together. Beatrice embarks on a new romance.
A cover-up comes back to haunt Nick and Ben, pitting them against Gendron.
Squad 19 is pulled into a big raid. Nick and Ben clash over a politically explosive DUI.
An amber alert ripples through 19. After realizing he’s been shutting Audrey out, Nick makes a strong commitment to her.
The squad is devastated when one of their own is brutally assaulted and left clinging to life.
In the climactic season finale, Nick receives devastating news, and struggles to contain his explosive response.