oz be an old tv series release by hbo . it show the life in one security prison call oswald and but the main plot be focus on emerald city and which be one of the prison level . oz have an amazing plot and an outstanding cast . there be many of character and almost all of them be very interesting . basically they be divide in group ( gang ) and the sicilian and the black people and the aryan and the gay and the latino and many others who doesn not have any specific group and but deal with many others like ryan oreily ( the irish ) . the plot be very well build and there be a lot of conspiracy inside and a lot of fight for the power . but all of this be not just expose in form of violence and all be very intelligent and smart and nothing happens without a reason and all be connect and very interesting to guess . i really love this series and and who wan na see something intelligent and very well produce with a very good cast and performance and must see oz .