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 Kovak Actor Michael Michele Cleo Finch Actor Maura Tierney Abby Lockhart Actor Ming-Na Wen Jing-Mei Chen Actor Paul McCrane Robert Romano Actor Mitch Pileggi Terry Waters Guest Star Ransford Doherty Randall James Guest Star Ben Hecht Eddie Bernero Guest Star Jack Shearer Hal Grunwald Guest Star John Cullum David Greene Guest Star Rachel Roth Angie Dwyer Guest Star Leslie Silva Sonya Bassett Guest Star Gerry Black Mr. Fletcher Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Erica Gimpel Adele Newman Guest Star Michael Crichton Executive Producer John Wells Executive Producer