Oz. Ryan, along with Cyril, Chris Keller and Tobias Beecher, who all have a vendetta against Schillinger, devise a plan to turn father against son. With Cyril as his bodyguard, Ryan sells drugs to Andrew then cuts him off, telling him that the only way he can buy drugs from now on is through the non-white inmates, something that the Aryan Brotherhood prohibits. Andrew eventually turns against his father, who bribes the guards to give him enough heroin to overdose. Cyril then fights in round two of the boxing tournament against Italian inmate Chucky Pancamo. Pancamo is the favorite to win, as he has more than 60 pounds on Cyril and is one of the most physically imposing inmates in Oz. Ryan spikes Pancamo's water, leading to a victory for Cyril, to the shock of the prison population. Cyril is now in the championship round and must face Hamid Khan. Warden Glynn postpones the fight indefinitely, due to the racial tension that is building between Oz inmates, mainly between the Black Muslim and White Aryan inmates. Ryan and Khan convince Glynn to allow the fight, but Glynn stipulates that there would be no audience. Khan is encouraged by all the black inmates to kill Cyril while Cyril is encouraged to kill Khan by all the white inmates. In the meantime, Murphy discovers that Ryan has been spiking the fighters' water and threatens to expose him if he spikes Hamid Khan's water. Desperate to find a way to beat Khan, Ryan calls in their father, Seamus, whom he and Cyril despise, as a way to anger Cyril into a violent frenzy. Ryan then tells Cyril to use that anger to beat Khan who, like Pancamo, is an easy favorite. Cyril imagines Khan is their father and beats him into a coma. Cyril feels bad about hurting Khan, but Ryan tells him that it was necessary to survive inside Oz. Khan is hooked up to life support which creates animosity among the black inmates and ratchets the racial tension up to an all-time high. A near race riot breaks out, and Oz is locked down. Khan dies after his wife wins a lawsuit to take him off of life support. Season 4 Part I The lockdown ends and Cyril is having nightmares over Khan's death. Ryan suggests psychotherapy with prison psychologist "Sister Pete" Reimondo, who thinks interaction sessions with the families of