Der im Rollstuhl sitzende Häftling Augustus Hill stellt für sich selbst fest, wo er im Hochsicherheitsgefängnis Oz dazugehört. Der Sträfling Tobias Beecher leidet unter höllischen psychischen Qualen. Denn die Entscheidung über seinen Hafturlaub naht.
Hill gets caught in a deliberate attempt to frame him for drug possession. To fight back, he gets some medical info that leads to Supreme's demise. Redding thanks Hill and offers to bring him back to the crew in return. Hill thanks Redding but refuses. The Colonel's attempt to kill Morales backfires. The tides turn on Cloutier who is first stripped of his position in his church and then endures his followers turning against him. After Hughes takes over the solitary ward, Glynn goes in to try and calm him down. Hughes tries to kill Glynn but gets killed himself. Frustrated, hurt and helpless, Glynn transcribes his letter of resignation to his secretary. Murphy offers to be McManus' teammate in the final basketball game. McManus appears on the tv game show and loses in the first round. White gets returned to solitary for starting a fight with other inmates. When McManus confronts him about it, White goes into a rage and stomps McManus. The news of Beecher's parole enrages Schillinger who immediately order's Beecher's murder. Later, Schillinger and Robson try to ambush Beecher in the library only they are shanked by an enraged Said. After talking with his mother, O'Reily decides to change up. He goes to Glynn to warn him of the bomb Connolly plans to detonate. The common room is cleared only for Connolly who holds the bomb as it's timer counts down. The bomb doesn't go off and Connolly's taken by the SORT team. Meanwhile, a guard lights a cigarette in the kitchen causing a major explosion.
Neljännen kauden päätösjaksossa tuttuun Ozin tyyliin aika moni pääsee hengestään, mutta miten käy Beecherin?
La Nouvelle Eglise demande à Cloutier de démissionner. Kirk engage les motards pour l'emmurer vivant. Hugues essaie de tuer Glynn, mais c'est lui qui se fait tuer. Schillinger apprend que Beecher va être mis en liberté conditionnelle et il engage un tueur...
קלוטייה מאבד את אחיזתו על הקהילה, שילינגר מגלה שלביצ'ר יש שימוע לשחרור, קונלי ואוריילי ממשיכים בתכניתם הזדונית. פרק אחרון בעונה.
Hill é apanhado numa tentativa deliberada de o incriminar por posse de drogas. Para retaliar, obtém informações médicas que levam à morte de Supreme. Redding agradece a Hill e oferece-se para o trazer de volta à sua equipa como paga. Hill agradece a Redding, mas recusa. Quando Hughes toma o controlo da enfermaria da solitária. Glynn vai até lá para tentar acalmá-lo. Hughes tenta matar Glynn, mas é morto. Frustrado, magoado e impotente, Glynn transcreve a sua carta de demissão ao seu secretário. Depois de falar com a mãe, O'Reily decide mudar. Vai falar com Glynn para o avisar da bomba que Connolly planeia detonar...
Хьюс пытается убить Глинна. Макмэнус появляется на телевикторине и проигрывает в первом раунде. После разговора с его матерью О'Реили решает измениться. Он идет к Глинну, чтобы предупредить его относительно бомбы, которую Коннолли планирует взорвать.
Cuando intentan incriminarle por posesión de drogas, Hill contraataca consiguiendo información médica para matar a Supreme. Schillinger se enfada cuando se entera de que Beecher conseguirá la libertad condicional y ordena su muerte.
Hill blir fast i ett försök att sätta dit honom för droginnehav. För att ge igen tar han reda på medicinsk information som leder till Supremes fall. Nyheterna om Beechers frigivning förargar Schillinger, som beordrar att han ska mördas.