Governor Devlin has reinstated capital punishment in the state; and the first Oz prisoner scheduled to die is Jefferson Keane, who killed a Latino in a skirmish. Before he's executed, Keane donates a kidney to his ailing sister Grace, then turns down lawyer-turned-inmate Tobias Beecher's offer to take up his defense. Sister Pete was fired when she joins the death penalty protesters (she gets her job back of course).
We find out Bob Rebadow was the last person to be executed in the state in 1965, but his sentence was commuted to life when a power outage prevented his execution. Said passes out due to severe high blood pressure; O'Reily arranges for D'Angelo to have a little accident; Alvarez's dying baby is taken off life support. After Keane's death, Richard L'Italien--slaughterer of women--is given a lethal injection and dies. O'Reily gets Beecher hooked on heroin. Dr. Nathan dumps McManus, and he then hooks up with Diane Wittlesey.