Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Sherry Stringfield Dr. Susan Lewis 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 Abraham Benrubi Guest Star Finn Carter Carrie Deal Guest Star Lucy Liu Mei-Sun Leow Guest Star Mary Mara Loretta Sweet Guest Star Ellen Crawford Nurse Lydia Wright Guest Star Deezer D Nurse Malik McGrath Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Christine Elise Guest Star Paul Dooley Henry Lewis Guest Star Valerie Perrine Cookie Lewis Guest Star Thom Mathews Michael Mazovick Guest Star Jennifer Tighe Vickie Mazovich Guest Star Joshua Hoon Cho Chia-Chia Guest Star Michael Crichton Executive Producer John Wells Executive Producer