Anthony Edwards Dr. Mark Greene Actor George Clooney Dr. Doug Ross Actor Julianna Margulies Head Nurse Carol Hathaway Actor Sherry Stringfield Dr. Susan Lewis Actor Noah Wyle Dr. John Carter Actor Eriq La Salle Dr. Peter Benton Actor Laura Innes Dr. Kerry Weaver Actor Maura Tierney Abby Lockhart Actor Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor Gloria Reuben Jeanie Boulet Actor John Stamos Dr. Tony Gates Actor Goran Visnjic Dr. Luka Kovac Actor Alex Kingston Dr. Elizabeth Corday Actor Maria Bello Dr. Anna Del Amico Actor Angela Bassett Dr. Cate Banfield Actor Mekhi Phifer Dr. Gregory Pratt Actor David Lyons Dr. Simon Brenner Actor Scott Grimes Dr. Archie Morris Actor Kellie Martin Lucy Knight Actor Sally Field Maggie Wyczenski Actor Paul McCrane Robert Romano Actor Ming-Na Wen Jing-Mei Chen Actor Michael Michele Cleo Finch Actor Erik Palladino Dave Malucci Actor Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer