Oz is in upheaval following the return of Martin Querns. Meanwhile, Howell and Robson each receive troubling news, Mukada answers an unsolved mystery, and the O’Reilys struggle to make amends….

Three new inmates arrive, one of whom is close to the O’Reilys; Busmalis and Rebadow prove to be “true Romeos”; the Keller-Beecher-Schillinger triangle gets more pointed; and an awards banquet…

Everyone has a different opinion of new inmate Idzik; Alvarez receives shocking news; Redding’s attempts at reform continue; Murphy makes a confession to Glynn; Morales'(David Zayas) medical suspicions are confirmed;…

Glynn receives some good and bad news on the toxic-poisoning case. Meanwhile, Rebadow’s relationship with Stella hits a snag; Keller and Beecher work out a mutually beneficial arrangement; Poet and…

Schillinger has a disappointing visit with his “hero”, Mayor Loewen. Glynn has to face up to the truth when Oz loses its first prisoner to toxic poisoning. Down in solitary,…

Lucille hires a bounty hunter, Ice, to find George Sr., who may be closer than everyone thinks. Gob tries to pull off an elaborate illusion, Maeby tries to set Lindsay…

Michael is increasingly frustrated over being abandoned by the family, and when the staircar is found in Mexico, Michael vows to find his father and give him a piece of…