Querns is appointed the new warden of Oz. Brass attempts to get famous for a day. Tim tries to change the mindset of Said's murderer. Cyril is finally executed. Keller brings Tobias back to Oz for good.
In the series finale, Oz is in upheaval after the return of Martin Querns. Meanwhile, Howell and Robson each receive troubling news and the O'Reilys try to make amends. Finally, the prison production of 'Macbeth' ends with a staggering final act.—Anonymous