When does Oz return?

Oz ran for six seasons, from its premiere on July 12, 1997, to its series finale on February 23, 2003. "Oz" is the nickname for the Oswald State Correctional Facility, formerly Oswald State Penitentiary, a fictional level 4 maximum-security state prison in an unspecified East Coast state. Most of the series' story arcs are set in "Emerald City", a wing of the prison named after a fantastic place in the Oz books.