Season 4 Prison Staff

Regular Cast Members
	Leo Glynn Position: Warden, Oswald State Correctional Facility Actor: Ernie Hudson
	Tim McManus Position: Unit Administrator, Cell Block 5 ("Emerald City"), Oswald State Correctional Facility Actor: Terry Kinney Fired by Leo Glynn in July 2000. Rehired as Unit B Administrator, then moved back to Em City after Querns was fired.
	Sister Peter Marie Reimondo Position: Psychiatric Evaluation/Drug Counselor, Oswald State Correctional Facility Actor: Rita Moreno Licensed psychologist and counselor.

Season 4 Recurring Cast

Recurring Cast Members
	Martin Querns Position: Warden, Lardner State Correctional Facility Actor: Reg E. Cathey Replaced McManus as Unit Administrator, Cell Block 5 ("Emerald City"), until fired by Warden Glynn after Adebisi's death. Later hired as Warden of Lardner State Correctional Facility.
	Detective John Basil ("Desmond Mobay") Position: Undercover Narcotics Detective, Oswald State Correctional Facility Actor: Lance Reddick John Basil was convicted of killing former detective Bruno Goergan while undercover in Oz as "Desmond Mobay." Basil is currently serving his sentence in Oz's Unit J.
	Father Ray Mukada Position: Chaplain, Oswald State Correctional Facility Actor: B.D. Wong
	Dr. Gloria Nathan Position: Medical Doctor, Oswald State Correctional Facility Actor: Lauren Vélez
	Officer Sean Murphy Position: Head Correctional Officer, Cell Block 5 ("Emerald City"), Oswald State Correctional Facility Actor: Robert Clohessy Transferred to Lobby Desk by Martin Querns. Transferred to Unit B by Tim McManus, then back to Em City.
	Officer Claire Howell Position: Correctional Officer, Oswald State Correctional Facility Actor: Kristin Rohde Solitary unit. Transferred to Cell Block 5 "Emerald City" by Martin Querns. Transferred to Unit J by Tim McManus in 2001.
	Governor James Devlin Position: Governor Actor: Zeljko Ivanek Won re-election in 2000.
	Officer Joseph Mineo Position: Correctional Officer, Oswald State Correctional Facility Actor: Philip V. Scozzarella Cell Block 5, "Emerald City."
	Officer Jason Armstrong Position: Correctional Officer, Oswald State Correctional Facility Actor: Timothy L. Brown Cell Block 5, "Emerald City."
	Officer Len Lopresti Position: Correctional Officer, Oswald State Correctional Facility Actor: Carl DiMaggio Unit B; Death Row.

Season 4 Guest Stars

Guest Stars
	Wendy Schultz Position: Governor Devlin's Campaign Manager Actor: Dana Reeve Schultz persuaded Leo Glynn to run with Devlin as Lieutenant Governor.
	Cardinal Frances Abgott Position: Cardinal Actor: Gavin MacLeod Cardinal Abgott visits the prison and Sister Pete when he receives a letter from Chris Keller telling her decision to leave the order. Father Ray worked in the Cardinal's office until the Cardinal transferred him to Oz (because Ray had too big an ego).
	Detective Guinevere McGorry Position: Police Detective Actor: Connie Nelson Det. McGorry investigated the death of Bruno Goergen.
	Detective Nancy Mears Position: Police Detective Actor: Stephanie Pope John Basil's partner. She posed as his girlfriend, Kina Spate, while he was undercover as Desmond Mobay.
	Special Agent Pierce Position: FBI Special Agent Actor: Robert John Burke Agent Pierce investigated the kidnapping of Holly and Gary Beecher. Later investigated the murder of several homosexual men, with Chris Keller as the prime suspect.
	Gou Liu Xio Position: U.S. State Department representative Actor: Elaine Tse Gou arrives with the illegal Chinese refugees brought to Oz, where they will be housed until deportation. she assists in translating for McManus, who naturally asks her out on a date.
	Floria Mills Position: Warden's Assistant Actor: Dena Atlantic Floria was hired as Warden Glynn's secretary/assistant in January 2001.
	Katherine McClain Position: Lawyer for the Alliance for Prisoners' Rights Actor: Sandra Purpuro Kathy McClain represented Tobias Beecher for his appeal in 2001.
	Nurse ? Position: Registered Nurse, Oswald State Correctional Facility Actor: Tessell Williams
Guest Hacks
	Officer Andrea Phelan Position: Correctional Officer, Oswald State Correctional Facility Actor: Pepa Unit B.
	Officer Joe Howard Position: Correctional Officer, Oswald State Correctional Facility Actor: Cell Block 5, "Emerald City." Shot by inmate Guillaume Tarrant.
	Officer Travis Smith Position: Correctional Officer, Oswald State Correctional Facility Actor: Jerome Preston Bates Moved to Cell Block 5 "Emerald City", Head Correctional Officer, by Martin Querns. Transferred to Solitary by Tim McManus.
	Officer Dave Brass Position: Correctional Officer, Oswald State Correctional Facility Actor: Blake Robbins Achilles tendon was severed by an inmate after winning a basketball game -- and being signed on with the Sacramento Kings.
	Officer Adrian Johnson Position: Correctional Officer, Oswald State Correctional Facility Actor: Cyrus Farmer
	Officer Vic D'Agnasti Position: Correctional Officer and SORT Team, Oswald State Correctional Facility Actor: Douglas Crosby
	Officer Tom Robinson Position: Correctional Officer, Oswald State Correctional Facility Actor: Jon Korkes
	?Unnamed Officer Position: Correctional Officer, Oswald State Correctional Facility Actor: Floyd Resnick