Anthony Chisholm

Mayor Wilson Loewen's arrival at Oz causes an ironic turn of events involving Schillinger and Beecher, and Dr Nathan figures out why solitary inmates are becoming ill.

Glynn gets mixed news about the toxic poisoning problem at Oz, Rebadow's relationship with the new librarian hits a snag, and Robson gets some redemption.

Idzik faces his enemies and asks for a transfer; the Muslims run into business trouble; the inmates rally to support the O'Reilys.

At the bi-annual review of solitary prisoners, the board decides to release Alvarez and Schillinger back into the general population. Rebadow, still mourning the loss of his grandson, gets transferred to work in the library.

Everyone has different opinions about the new inmate Idzik, Alvarez gets shocking news, Redding's battle continues, and Glynn hears a confession from Murphy.

Schillinger's visit with Mayor Loewan proves to be disappointing, Glynn must face the truth about the toxic poisoning problem at Oz, and Officer Brass spends some quality time with Morales.