Anthony Edwards-->Dr.Mark Greene
Noah Wyle-->Dr.John Carter
Laura Innes--> Dr.Kerry Weaver
Alex Kingston-->Dr.Elizabeth Corday
Paul McCrane-->Dr.Robert Romano
Goran Visnjic-->Dr.Luka Korvac
Maura Tierney--> Abby Lockhart
Michael Michelle--> Dr.Cleo Finch
Erik Palladino--> Dr.Dave Malucci
Ming-Na Wen--> Dr.Deb Chan
DEPARTED CAST
Sherry Springfield--> Dr.Susan Lewis
George Clooney--> Dr. Doug Ross
Julianna Margalies--> Nurse Carol Hathaway
Kellie Martin--> Lucy Knight
Maria Bello--> Dr.Anna Del Amico
Gloria Reuben--> Dr.Jeanie Boulet
THE NURSES
Conni Marie Brazelton as Nurse Conni Oligario
Laura Ceron as Nurse Chuny Marquez
Ellen Crawford as Nurse Lydia Wright
Deezer D as Nurse Malik McGrath
Yvette Freeman as Nurse Haleh Adams
Lily Mariye as Nurse Lily Jarvik
Vanessa Marquez as Nurse Wendy Goldman
Gedde Watanabe as Nurse Yosh Takata
BEHIND THE DESK
Abraham Benrubi as Jerry Markovic
Troy Evans as Frank
Malgoscha Gebel as Bogdanilivestsky "Bob" Romansky
Mariska Hargitay as Cynthia Hooper
Kristin Minter as Randi Fronczak
Charles Noland as E. Ray Bozeman
Pamela Sinha as Amira
SURGICAL DOCTORS & NURSES, PHYSICIANS & MED STUDENTS
Alan Alda as Dr. Gabriel Lawrence
Sam Anderson as Dr. Jack Kayson
Amy Aquino as Dr. Janet Coburn
John Aylward as Dr. Donald Anspaugh
Purva Bedi as Priya Shailendra
Clancy Brown as Dr. Ellis West
Christine Elise as Harper Tracy
Omar Epps as Dr. Dennis Gant
Tyra Ferrell as Dr. Sarah Langworthy
Jorja Fox as Dr. Maggie Doyle
Jami Gertz as Dr. Nina Pomerantz
Matthew Glave as Dr. Dale Edson
Glenne Headly as Dr. Abby Keaton
Michael Ironside as Dr. William "Wild Willy" Swift
Penny Johnson as Lynette Evans
Dinah Lenney as Nurse Shirley
Harry J. Lennix as Dr. Greg Fischer
Bellina Logan as Nurse Kit
William H. Macy as Dr. David Morgenstern
CCH Pounder as Dr. Angela Hicks
Ron Rifkin as Dr. Carl Vucelich
Rick Rossovich as Dr. Taglieri
John Terry as Dr. David "Div" Cvetic
EMT's
Ron Eldard as Ray "Shep" Shepard
Carlos Gomez as Raul
Lynn A. Henderson as Pam Olbes
Monte Russell as Zadro White
Emily Wagner as Doris Pickman
OTHER RECURRING CHARACTERS
Khandi Alexander as Jackie
Michael Beach as Al Boulet
Julie Bowen as Roxanne
Lisa Nicole Carson as Carla Simmons (nee Reese)
John Cullum as David Greene
Rebecca DeMornay as Elaine Nichols
Kirsten Dunst as Charlene "Charlie" Chiemienga
Mike Genovese as Officer Al Grabarsky
Christine Harnos as Jennifer Simon (Greene)
Trevor Morgan as Scott Anspaugh
Martha Plimpton as Meg Horn
Ving Rhames as Walt
Beah Richards as Mrs. Benton
Jonathan Scarfe as Chase Carter
Frances Sternhagen as Millicent "Gamma" Carter
Kathleen Wilhoite as Chloe Lewis
Cress Williams as Officer Reggie Moore
Yvonne Zima as Rachel Greene