Fighting crippling pain, Del is determined to continue his investigation and turns to Steve for help. Billy leaves for basic training and finds comfort when he befriends a fellow traveler. The Landwill conflict comes to a head.

Harris finally finds the anonymous eyewitness. Lee decides not to return to New York. Billy is returned to the general prison population to face the consequences of his actions. The D.A. may be forced to drop the case. Season finale.

Isaac is taken in by a kind stranger. Grace’s union drive is put to the test. Billy fires his public defender. Harris realizes what he has to do.

Billy gets in with a questionable crowd. Isaac travels alone. Harris’ investigation into the anonymous eyewitness continues as a high school football player ODs.

Angela is brought into Del's secret plan. Grace receives a promising job offer, but remains worried about Billy’s behavior. Lee and Isaac have a memorial service for their father.

Del feels pressure surrounding the Brotherhood as he looks into Vic's disappearance. Lee and Isaac argue about her feelings regarding her job. Isaac’s feelings are hurt when he crosses paths with someone from Russell’s life, while Billy's behavior grows more erratic and causes him to act out.

In a small rust belt town in southwest Pennsylvania, Chief of Police Del Harris investigates after a dead body turns up in an abandoned steel mill. Series premiere.

A new murder in Buell lights a fire in Steve as he doubles down on his suspicions of Grace and Del. Del continues to investigate the bombing in Pittsburgh while also becoming more enmeshed in the Brotherhood.

Harris’ investigation continues. Isaac leaves town. Billy and Lee reunite as Buell celebrates a shotgun wedding.

Del and Vic grow closer during their weekend in Buell. Lee grows more suspicious of her law firm as her investigation leads her to surprising evidence. A job prospect presents itself to Grace, and Isaac and Russell bond after a harrowing experience. Steve’s suspicion of Grace and Del grows into an obsession.

Grace enlists help in her effort to unionize the dressmakers. The sheriff gets an anonymous tip about the murder in the steel mill.

Del invites Vic out to his cabin for a male bonding weekend. Grace goes toe-to-toe with Sue at the District Attorney debate. The town of Buell is rocked by another murder of one of their own, while Steve’s suspicion of Grace grows.