Clayton Hughes is transferred to Unit J ('The Cop Unit').Ronald Barlog asks Tobias Beecher for legal advice, who then tells Chris Keller. The FBI approaches Ronald Barlog to testify against Chris Keller in the homosexual murders.Martin Querns has been made warden of Lardner.

10 prisoners sign up for the drug test, including: Ryan, Cyril, Beecher, Hoyt, Robson, Wick, and Timmy Kirk.

Scozzarella as Correctional Officer Joseph Mineo

Barry Shabaka Henley as Lieutenant Schmand.

Keller and Father Ray have an intense discussion about Beecher. Hughes, now raging beyond sensibility, makes an attempt on Devlin's life at a press conference. Schillinger agrees but sends Robson to eliminate Zabitz instead.

Cyrus Farmer as Correctional Officer Adrian Johnson After Keller reveals his plot to hug him, Eli Zabitz asks Schillinger for protection.

Carl DiMaggio as Correctional Officer Len Lopresti.

Tim Brown as Correctional Officer Jason Armstrong.

Jerome Preston Bates as Correctional Officer Travis Smith.

Kristen Rohde as Correctional Officer Claire Howell.

Tom Mardirosian as Agamemnon 'The Mole' Busmalis.

Lord Jamar as Kevin 'Supreme Allah' Ketchum.

Robert Clohessy as Correctional Officer Sean Murphy.

Robert John Burke as Agent Pierce Taylor.

Rita Moreno as prison counselor Sister Peter Marie Reimondo.Terry Kinney as Emerald City Unit Manager Tim McManus.Alvin Yood: Convicted January 20, 2001.Manslaughter, Endangering the Welfare of a Child. Ronald Barlog: Neck snapped by Chris Keller.Miguel Alvarez lobbies Leo Glynn to get out of solitary by becoming his informant Cyril O'Reily's anger intensifies Inmates volunteer to test an experimental aging drug in exchange for reduced prison time Augustus Hill seeks revenge against a former basketball star Jackson Vahue, who is up for parole William Giles is transferred to death row Vern Schillinger immerses himself in the Bible, and James Robson and Jaz Hoyt warn Jeremiah Cloutier to stay away from Vern Schillinger Agamemnon Busmalis gets permission to get married, but then gets sent to Solitary when his tunnel is discovered Leo Glynn hosts the annual Warden's Convention Clayton Hughes is transferred to Oz Ronald Barlog finds himself in a deadly love triangle with Tobias Beecher and Chris Keller.

Oz season 4 episode 11 keller