Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Eriq La Salle Dr. Peter Benton Actor Noah Wyle Dr. John Carter Actor Julianna Margulies Head Nurse Carol Hathaway Actor Gloria Reuben Jeanie Boulet Actor Laura Innes Dr. Kerry Weaver Actor Yvonne Zima Guest Star Jorja Fox Guest Star John Aylward Guest Star CCH Pounder Guest Star Lisa Nicole Carson Guest Star Ramon Bieri Guest Star Amy Aquino Dr. Janet Coburn Guest Star Bellina Logan Nurse Kit Guest Star Gia Carides Suzanne Alner Guest Star Lois Foraker Ida Blinnder Guest Star Richard Zobel Mr. Bartok Guest Star Jami Gertz Guest Star Ted Rooney Neonatologist Dr. Tabash Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Michael Crichton Executive Producer John Wells Executive Producer