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 Kirsten Dunst Charlie Chiemingo Guest Star Harry Lennix Dr. Greg Fischer Guest Star Jami Gertz Guest Star Deborah May Mary Cain Guest Star Jack Blessing Roger Drummond Guest Star Paul Collins Dr. Norm Middleton Guest Star John Cothran Dennis Gant Sr. Guest Star Erica Gimpel Adele Newman Guest Star Fredric Lehne Bum's Friend Guest Star Clare Wren Mrs. Chiemingo Guest Star Michael Crichton Executive Producer John Wells Executive Producer