As a water crisis erupts and a new mayor is sworn in, the understaffed police department faces uncertainty while struggling to protect the city.

A new chief ushers in change as a presidential debate comes to town. A young cadet navigates training, while veteran Frost recalls a painful incident.

Chief Johnson's new team targeting high-crime areas takes action, to mixed response from the community. Dion and his mother close in on graduation.

Flint police battle with a store that's a magnet for criminal activity. Dion has his first shift on the job. The officers react to tragedy in Dallas.

Flint PD copes with anti-police sentiments. The city starts a volunteer community police program. Encouraging crime statistics bring cautious optimism.

Presidential candidate Donald Trump visits Flint. As voters weigh renewing a police funding tax, Chief Johnson looks for other ways to raise revenue.

Johnson clashes with the city council over the budget as crime stats head in the wrong direction. Balasko and Frost ponder their future together.