Der psychisch labile Insasse Tobias Beecher befindet sich noch immer im Krankenhaus. Die Häftlinge Vern Schillinger und Chris Keller haben ihm bei einem Gewaltübergriff sämtliche Knochen gebrochen. Miguel Alvarez schmort weiterhin in einer Gummizelle - als Strafe dafür, dass er Officer Eugene Rivera die Augen herausgeschnitten hat.
In addition to the name change to "Oswald State Correctional Facility," more changes abound. Newbies Coyle, Kahn, and Ricardo arrive and partner up with Wangler, Said, and Hernandez respectively. Adebisi's "recovery" prompts a return. Clayton Hughes, son of a past Oz guard who came through the ranks with Glynn, asks Glynn to hire him. Meanwhile new Officer Howell, gets friendly with McManus. A managed health care company takes over Oz's infirmary, to Dr. Nathan's disgust and Alvarez's detriment. Cyril O'Reily still has nightmares about being raped by Schillinger and Ryan schemes on revenge. Said develops an unlikely alliance as he starts a hunger fast in response to McManus rejecting his request for food in his cell during his holy season. Keller confesses his part in setting up Beecher and is immediately taken into protective custody. Beecher gets some oh-so-sweet revenge.
Vankilan nimi muutetaan Oswaldin rangaistuslaitokseksi. Adebisi pääsee pois psykiatriselta osastolta ja takaisin Em Cityyn. Ryan O'Reily miettii keinoja kostaa Schillingerille veljensä Cyrilin raiskaus.
Oz est plongée dans des conspirations alors que Beecher est relâché de l'hôpital et maintenant prêt à prendre sa revanche. Abedisi est relâché du service psychiatrique et retourne en cuisine. Ryan O'Reily cherche une opportunité de venger le viol de son frère par Schillinger. Pendant ce temps, le directeur Glynn embauche le fils d'un ancien agent correctionnel qui a été assassiné à Oz, et une nouvelle arrivée, Claire Howell, a des vues sur McManus...
דבלין מחליט להפריט את אוז, מה שגורם לחיכוכים בין אנשי הצוות המקוריים למנהלים החדשים.
Oz diviene una struttura correzionale: questo fatto introduce nuovi cambiamenti. I detenuti Coyle, Kahn e Ricardo vengono affidati a Wangler, Sahid e Hernandez. Clayton Hughes chiede a Glynn di essere assunto a Oz. L'agente di custodia Claire Howell stringe una forte amicizia con McManus. Cyril soffre di incubi dopo lo stupro e così Ryan medita vendetta nei confronti di Schillinger. Keller confessa la sua responsabilità in quanto accaduto a Beecher e per questo viene messo sotto custodia protettiva. Lo stesso Beecher trova il modo di vendicarsi.
Beecher, de membros fraturados sarados, tem alta do hospital e está agora livre para se vingar. Adebisi tem alta da enfermaria psiquiátrica e regressa à cozinha. Ryan O'Reily procura uma oportunidade para vingar a violação do irmão.
В тюрьму ОЗ добавляют новых заключенных и надсмоторщиков.
Beecher sale del hospital listo para vengarse. Adebisi sale de psiquiatría y vuelve a la cocina. Ryan O’Reily busca la oportunidad de vengar a su hermano tras su violación.
Beechers brutna ben har läkt, så han släpps från sjukhuset och är nu fri att hämnas. Adebisi släpps från psykiatriavdelningen och återvänder till köket. Ryan O'Reilly letar efter ett tillfälle att hämnas sin brors våldtäkt.
