In the 'Emerald City' experimental unit of Oswald State Penitentiary, we meet...
Oz
Season 1 Episode 3: God's Chillin'
Friction is growing in the wake of two deaths so Said, Wiseguy leader Schibetta and Gangbanger Jefferson Keane are brought together by Warden Glynn, who tells them to keep their boys quiet or else he'll lock the prison down.