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 John Aylward Guest Star CCH Pounder Guest Star Kirsten Dunst Charlie Chiemingo Guest Star Lisa Nicole Carson Guest Star Harry Lennix Dr. Greg Fischer Guest Star Deborah May Mary Cain Guest Star Caitlin Dulany Heather Morgan Guest Star Ellen Crawford Guest Star Yvette Freeman Guest Star Jennifer McComb Cindy Patterson Guest Star Marnie McPhail Lisa Sailor, ICU Nurse, Benny's Mom Guest Star Billie Worley Mike Patterson Guest Star Michael Crichton Executive Producer John Wells Executive Producer