ER season 12

The twelfth season of the American fictional drama television series ER first aired on September 22, 2005, and concluded on May 18, 2006. It consists of 22 episodes.

Plot
Kovač and Abby become the main central characters and their relationship slowly starts to get back on track as they deal with her unexpected pregnancy. A new nurse manager causes friction among the staff, following a successful operation Weaver no longer needs her cane, Pratt journeys to Africa where he joins Carter on a relief mission while a face from Sam's past leaves the lives of Abby and Kovač hanging in the balance. In addition to Darfur, geopolitics of the day get a strong spotlight due to the Iraq War.

Changes
Following Sherry Stringfield's departure in the season premiere, this season becomes the first to not feature any of the original cast members in a regular capacity (Noah Wyle is featured for four episodes in a guest capacity throughout the season).

Main cast

 * Goran Visnjic as Dr. Luka Kovač, Attending Physician / Chief of Emergency Medicine
 * Maura Tierney as Dr. Abby Lockhart, Second Year Resident
 * Mekhi Phifer as Dr. Greg Pratt, Fourth Year Resident
 * Sherry Stringfield as Dr. Susan Lewis, Chief of Emergency Medicine (episode 1)
 * Parminder Nagra as Dr. Neela Rasgotra, Second Year Resident
 * Linda Cardellini as Nurse Samantha Taggart
 * Shane West as Dr. Ray Barnett, Second Year Resident
 * Scott Grimes as Dr. Archie Morris, Chief Resident
 * Laura Innes as Dr. Kerry Weaver, Chief of Staff

Supporting

 * Doctors and medical students
 * John Leguizamo as Dr. Victor Clemente, Attending Physician
 * Amy Aquino as Dr. Janet Coburn, Chief of Obstetrics and Gynecology
 * John Aylward as Dr. Donald Anspaugh, Surgical Attending Physician and Hospital Board Member
 * Leland Orser as Dr. Lucien Dubenko, Chief of Surgery
 * Sara Gilbert as Dr. Jane Figler, ER Intern
 * Michael Buchman Silver as Dr. Paul Myers, Psychiatrist
 * Maury Sterling as Dr. Nelson, Psychiatrist
 * Dahlia Salem as Dr. Jessica Albright, Surgical Chief Resident
 * Anthony Giangrande as Dr. Jeremy Munson, ER Intern
 * Michael Spellman as Dr. Jim Babinski, ER Intern
 * Kim Strauss as Dr. Ari, Anesthesiologist
 * Britain Spellings as Dr. Sackowitz
 * Corey Stoll as Dr. Teddy Marsh, Intern
 * Damali Scott as Dr. Lana Clemons, Intern
 * Christopher Grove as Dr. Marty Kline


 * Nurses
 * Kristen Johnston as Nurse Manager Eve Peyton
 * Deezer D as Nurse Malik McGrath
 * Laura Cerón as Nurse Chuny Marquez
 * Yvette Freeman as Nurse Haleh Adams
 * Lily Mariye as Nurse Lily Jarvik
 * Dinah Lenney as Nurse Shirley
 * April Lee Hernandez as Nurse Inez
 * Kyle Richards as Nurse Dori Kerns
 * Nadia Shazana as OR Nurse Jacy
 * Cynthia Cervini as Nurse Anna Waldron


 * Staff, Paramedics and Officers
 * Abraham Benrubi as Desk Clerk Jerry Markovic
 * Troy Evans as Desk Clerk Frank Martin
 * Tara Karsian as Social Worker Liz Dade
 * Jordan Calloway as Hospital Volunteer K.J. Thibeaux
 * China Shavers as Olivia Evans from Ceasefire
 * John Stamos as Paramedic Tony Gates
 * Emily Wagner as Paramedic Doris Pickman
 * Montae Russell as Paramedic Dwight Zadro
 * Lyn. A Henderson as Paramedic Pamela Olbes
 * Brian Lester as Paramedic Brian Dumar
 * Michelle C. Bonilla as Paramedic Christine Harms
 * Demetrius Navarro as Paramedic Morales
 * Louie Liberti as Paramedic Bardelli
 * Christopher Amitrano as Officer Hollis
 * Bobby Nish as Officer Danny Yau
 * Eddie B. Smith as Officer Jones
 * Mary E. Kennedy as Officer Trudy Lange
 * Louis Iacoviello as Officer Rovner


 * Family
 * Dominic Janes as Alex Taggart
 * Garret Dillahunt as Steve Curtis
 * Danny Glover as Charlie Pratt
 * Sam Jones III as Chaz Pratt
 * Tina Lifford as Evelyn Pratt
 * Cecily Lewis as Jocelyn Pratt
 * Ernie Hudson as Colonel James Gallant
 * Sheryl Lee Ralph as Gloria Gallant
 * Hassan Johnson as Darnell Thibeaux

Guest stars

 * Noah Wyle as Dr. John Carter
 * Sharif Atkins as Dr. Michael Gallant
 * Mary McCormack as Debbie (in Darfur)
 * Eamonn Walker as Dr. Steven Dakarai (in Darfur)
 * Kat Dennings as Zoe Butler
 * Serena Williams as Alice Watson
 * Stana Katic as Blaire Collins
 * James Woods as Dr. Nate Lennox
 * Armand Assante as Richard Elliott
 * C. Thomas Howell as Vincent Janeson
 * Suzanne Cryer as Toni Stillman