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 Alex Kingston Dr. Elizabeth Corday Actor Kellie Martin Lucy Knight Actor Goran Visnjic Dr. Luka Kovac Actor Michael Michele Cleo Finch Actor Maura Tierney Abby Lockhart Actor Ming-Na Wen Actor Paul McCrane Robert Romano Actor Dakota Fanning Delia Chadsey Guest Star Julie Marie Berman Jessamyn Chadsey Guest Star Sydney Walsh Mrs. Lomax Guest Star Steven Flynn Avery Chadsey Guest Star John Cullum David Greene Guest Star Liza Weil Samantha Sobriki Guest Star John Doman Dr. Carl Deraad Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Susan Blommaert Sarah McKenzie Guest Star Conni Marie Brazelton Nurse Connie Oligario Guest Star Michael Crichton Executive Producer John Wells Executive Producer