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 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 Rheagan Wallace Layla Dering Guest Star Marin Hinkle Kathy Guest Star Thandiwe Newton Makemba 'Kem' Likasu Guest Star Richard Kline Risk Assessment Expert Guest Star F.J. Rio Miguel Rivas Guest Star Oliver Davis Alex Taggart Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Coburn Hartsell Dean Guest Star J.K. Simmons Gus Loomer Guest Star Rengin Altay Kitty Guest Star Matt Barr Billy Guest Star Martin Garcia Airline Employee Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer