Oz is in upheaval following the return of Martin Querns; Howell and Robson receive troubling medical news; Alvaraez succumbs to an enticing offer.
Three new inmates arrive at Oz; Busmalis and Rebadow prove to be true Romeos; an awards Banquet ends in a fateful discovery.
Idzik faces his enemies and asks for a transfer; the Muslims run into business trouble; the inmates rally to support the O'Reilys.
Alvarez receives shocking news; Redding's battle continues; Murphy makes a confession to Glynn; Morales' medical suspicions are confirmed.
Glynn receives mixed news on the poison problem; Keller and Beecher work out an agreement; Robson finally gets some redemption.
Schillinger has a disappointing visit with the mayor; Officer Brass spends some quality time with Morales; Cyril O'Reily undergoes an unusual method of therapy.
The unexpected arrival of the mayor spurs an ironic turn involving Schillinger and Beecher; Dr. Nathan discovers why solitary inmates are getting sick.
Alvarez and Schillinger are put back in the general population; the new librarian lifts Rebadow's spirits.
Beecher clears the air about Schillinger; Cyril finds himself in the media spotlight; Morales and Urbano forge an agreement.
Mature audience.Redding discovers that busmalis lied about desantos. Furious, he confronts morales and the confrontation gets the two of them thrown in the hole. Cyril gets convicted of the murder and ryan tells the attorney not to appeal.
Said returns from the hole. The inmate variety show takes shape with Busmalis as mc and White the featured performer. Cyril's trial looms. Redding continues to search for culprit that gave hill drugs. Chucky's condition worsens.
Mature audience.Said and Arif go to warden Glynn about Lalar's murder. Said confronts White about passing drugs. Chucky Pancamo's condition worsens. On orders from Schillinger, Winthrop gets into a fight with Guenzel. Hill becomes gravely ill.
Mature Audience. Cyril kills Li Chien. Cyril is sent to solitary and Ryan to the cage. Redding Hill's grief over his dead mother and divorce from his wife sends him back to drugs happily supplied by Poet.
After schillinger's released, redding and morales form a pact to eliminate the italians from the drug trade. Schibetta makes a move on the aryans only it backfires with terrifying results.
Mature audience.Montgomery asks for more hush money from ryan so ryan devises a plan to have montgomery eliminated. Ryan's mom, suzanne fitzgerald comes to oz to instruct inmates in performance arts. Officer brass returns to oz.
Mature audience.White, Alvarez and other inmates in solitary are temporarily transferred to em city while repairs are being made. As schillinger and robson recover from their wounds, they begin planning revenge on the muslims.
MATURE AUDIENCE. The Colonel's attempt to kill Morales backfires. Cloutier is stripped of his position in his church and endures his followers turning against him. After Hughes takes over the solitary ward, Glynn goes in to try and calm him down.
MATURE AUDIENCE. White goes to counseling but causes a fight and gets thrown in the hole. New inmate and refugee Connolly arrives and forms a dangerous alliance with O'Reily. Said continues to grapple with his conscious about Adebisi's death.
MATURE AUDIENCE. McManus returns from the hospital with an ultimatum for Redding and Morales. Redding and his new cellmate 'The Colonel' develop a delicate alliance. Clayton Hughes, on an emotional rampage, kills Basil.
MATURE AUDIENCE. Wick's family sues Oz for his death caused by the experimental drugs he took. Dr. Nathan's under investigation. Ryan gets a surprise visit from his real mother.
MATURE AUDIENCE. Alvarez returns to solitary after he snaps and kills another Latino inmate. After officially joining the Muslims, Tidd attempts to kill Said, but decides not to after his conscious gets to him.
MATURE AUDIENCE.Robson and Hoyt tell Rev. Cloutier to back off of Schillinger. Schillinger and Beecher have their first counseling interaction session. Tidd continues to get close to Said by defending Arif in a fight.
A new inmate makes a power play; Chinese refugees are housed in Emerald City.
MATURE AUDIENCE.Adebisi's death looms large over Oz. With special permission from the Governor, a TV news crew comes to Oz to film. Ryan O' Reily recognizes the star reporter as a past enemy and he immediately embarks on revenge.
MATURE AUDIENCE. A corpse is found in the laundry room. Querns gets fired, McManus is reinstated and Adebisi and his cronies get moved to Unit B. Enraged about these new developments
Said plots with McManus to end Querns' and Adebisi's control. Schillinger beats the kidnapping rap and once Beecher finds out, he plots with Pancamo for revenge. After Keller reveals his plot to kill him, Zabitz asks Schillinger for protection.
An investigation into Goergen's death starts and Mobay's anxious when the investigator targets him first. Arif challenges Querns's authority. Ginzburg's poor health forces him to request an early execution.
Things get lively on death row after Shirley Bellinger's execution. Mobay's ordered to kill someone as a final test of his loyalty and a new prisoner, whom Mobay's familiar with, makes the perfect victim. A call stirs McManus' emotions again.
The kidnapping of Beecher's children has everyone upset and Beecher inconsolable. Oz prepares for Shirley Bellinger's hanging as the death penalty protests continue. Said announces good and bad news in the state's decision for the inmates
MATURE AUDIENCE. Busmalis and Alvarez flee from Oz via one of Busmalis' tunnels. Hernandez discloses details about the shooting to Glynn and mentions Tarrant getting the gun from Adebisi, who got the gun originally from Clayton Hughes.
Said's decision to help Cramer secure a new trial is met with opposition by the Muslims. Poet ponders his next move now that Wangler and Pierce are dead. O'Reily's plan backfires and results in another inmate's death. Bellinger returns.
The lockdown ends. Murphy makes a suggestion to ease the strain in solitary after another inmate commits suicide. Devlin invites Glynn to be his running mate in the Gov's re-election bid. A shootout results in four deaths.
MATURE AUDIENCE. When his plea for an expedited return to solitary goes on deaf ears, Miguel takes matters into his own hands. Hill gets sent to the hole. The boxing finals match ends in tragedy.
Wrangler and Adebisi register a complaint to the Warden. Yet another inmate meets with demise. Bellinger enlists McManus' help. Adebisi begins sowing seeds of discontent and a fight erupts in the gym resulting in a lockdown.
Cudney threatens to spill the truth about Cyril's 'wins', Ryan solicits Kosygin for help, schemes to have Kosygin and Stanislofsky eliminated and finally, tips off the hacks to get Hernandez and Ricardo busted. Busmalis gets a visitor.
After getting pummeled by Khan in a boxing match, Kenny discovers his wife's infidelity and arranges a contract. Busmalis gets a surprise in the mail. Hughes presses Glynn for more information about past deeds.
Andy Schillinger arrives to Oz and Vern tries to get Warden Glynn to move Andy in with him. McManus is sued for sexual harassment. Miguel gets a directive from Hernandez. Richie Hanlon's death sentence is overturned.
Each group in Oz prepares their boxer for upcoming matches. Ricardo and Hughes have a brief confrontation that results in a reprimand. Nappa turns over control to Pancamo after discovering he has a debilitating illness.
Despite Glynn's reservations, an inmate boxing program is created and inmates get psyched for the competition. Adebisi is approved to work in the AIDS ward. Alvarez begins deteriorating when his medication is eliminated.
Said develops an unlikely alliance as he starts a hunger fast in response to McManus rejecting his request for food in his cell during holy season. Keller confesses setting up Beecher and is taken into protective custody.
Mack and another Aryan try to escape though Busmalis and Rebadow's tunnel but the tunnel collapses. Hill gets the idea of escaping Oz by hiding in a coffin. Sippel re-enters Oz because he can't deal with life on the outside.
Cyril O'Reily, Ryan's brother comes to Oz and is immediately violated by Schillinger. Ryan tries to get him away from OZ, but Cyril instead lands in the hole. El Cid tells Alvarez to 'pluck out' the eyes of a prison guard, Rivera.
Schillinger enlists Said to get him out of jail, but Said backs out. McManus decides not to incriminate Wittlesey in Ross's death. Alvarez is bumped out of the Latino power seat by Raoul Hernandez, a.k.a. El Cid.
Adebisi poisons Schibetta. Now that his brother has turned himself in for murder, Glynn no longer owes Schibetta any favors. Sister Peter Marie figures out that Giles witnessed who killed her husband. Poet gets his parole.
Richie Hanlon is forced to admit to a murder he didn't commit. Schibetta offers Alvarez a piece of his drug biz in exchange for killing Adebisi. Beecher is forced to meet with the judge who sentenced him.
The Aryans are losing credibility, so Schillinger arranges to have a tough named Vogel killed with Beecher being the next on the hit list. The prison is filled with excitement as a woman arrives on death row to be executed.
After the riot, Schibetta takes over the kitchen by cashing in a favor Glynn owes the family. As Schillinger's parole hearing nears, Beecher taunts his nemesis mercilessly in an attempt to ruin Schillinger's quest for freedom.
In the aftermath of the riot that killed inmates and officers, Oz is locked down and prisoners are sent either to solitary or 'gen pop.' A special committee is appointed to investigate the riot and Governor Devlin's handling of it.
MATURE AUDIENCE. Beecher is released from the hole and Schillinger is left eyeless. A riot breaks out after 2 punks get into a fight. After several officers are taken hostage, tear gas is thrown in and the SORT team arrives, guns blazing.
Said ostracizes Mershah for turning his back on him when he was dying-and orders all the Muslims to cast him out. Impressed by Said's power Groves decides to kill Glynn in his honor, but ends up killing an officer by mistake.
Beecher, the neo-Nazi Schillinger's 'girlfriend', flips out after taking PCP. Mob boss Schibetta has stomach pains caused by ground glass in his food, and Said has a heart attack after refusing blood pressure medication.
Infiltration of drugs into Oz has reached unprecedented levels. McManus and Glynn's efforts to find the smugglers backfire. Despite a lockdown, drugs continue to trickle in--and blame shifts from inmates to corrupt officials.
Governor Devlin has reinstated capital punishment and the first Oz prisoner scheduled to die is Jefferson Keane. Before he's executed, Keane donates a kidney to his ailing sister. Richard L'Italien is next in line to be executed.
Friction grows in the wake of 2 deaths, Schibetta, Said, and Keane are brought together by Warden Glynn who tells them to keep their boys quiet or he'll lock the prison down. Tension increases following a visit from the Governor.
With Schibetta and the prison brass in a race to uncover Ortolani's killer (for very different reasons), we see how inmates react to visits from both their wives and, in one case, family members who are also in prison.
In the 'Emerald City' experimental unit of Oswald State Penitentiary, we meet diverse inmates: Homeboys, Latinos, Muslims, Irish, Aryans, and Wiseguys. No leader emerges--with a possible exception of Kareem Said, a Muslim who preaches non-violence.