Noah Wyle Dr. John Carter Actor Laura Innes Dr. Kerry Weaver Actor Alex Kingston Dr. Elizabeth Corday Actor Goran Visnjic Dr. Luka Kovac Actor Maura Tierney Abby Lockhart Actor Sherry Stringfield Dr. Susan Lewis Actor Mekhi Phifer Dr. Gregory Pratt Actor Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor Shane West Actor Louise Fletcher Roberta 'Birdie' Chadwick Guest Star Mädchen Amick Wendall Meade Guest Star Eion Bailey Jake Scanlon Guest Star Pat Carroll Rebecca Chadwick Guest Star Arlen Escarpeta Adrian Guest Star Scott Grimes Dr. Archie Morris Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Troy Evans Frank Martin Guest Star Montae Russell Dwight Zadro Guest Star Yolanda Lloyd Delgado Elena Tabajas Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer