Anthony Edwards Dr. Mark Greene 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, Director Alex Kingston Dr. Elizabeth Corday Actor Kellie Martin Lucy Knight Actor Paul McCrane Robert Romano Guest Star Anne Bellamy Dottie Armstrong Guest Star Ford Rainey Army Armstrong Guest Star Holland Taylor Phyllis Farr Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Fern Persons Old Woman on El Guest Star Richard Pierre-Louis Romeo Guest Star Emily Wagner Doris Pickman Guest Star Demetrius Navarro Morales Guest Star Dinah Lenney Nurse Shirley Guest Star Michael Crichton Executive Producer John Wells Executive Producer