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 Paul McCrane Robert Romano Actor Ming-Na Wen Actor Sherry Stringfield Dr. Susan Lewis Actor Sharif Atkins Actor Mekhi Phifer Dr. Gregory Pratt Actor Linda Cardellini Nurse Samantha Taggart Actor Bob Newhart Ben Hollander Guest Star Betsy Brandt Franny Myers Guest Star Efren Ramirez Jimmy Guest Star Oliver Davis Alex Taggart Guest Star Dohn Norwood Mr. Persky Guest Star Parminder Nagra Dr. Neela Rasgotra Guest Star Scott Grimes Dr. Archie Morris Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Troy Evans Frank Martin Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer