Mekhi Phifer Dr. Gregory Pratt Actor Maura Tierney Abby Lockhart Actor Linda Cardellini Nurse Samantha Taggart Actor Goran Visnjic Dr. Luka Kovac Actor Parminder Nagra Dr. Neela Rasgotra Actor Shane West Actor Scott Grimes Dr. Archie Morris Actor Laura Innes Dr. Kerry Weaver Actor Kristen Johnston Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Megan Ward Judy Anderson Guest Star Abraham Benrubi Jerry Markovic Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star April L. Hernandez Nurse Inez Guest Star Lily Mariye Nurse Lily Jarvik Guest Star Kyle Richards Nurse Dori Guest Star Daniel Clark Jason Digby Guest Star David DeLuise Brad Anderson Guest Star John Wells Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer Jack Orman Executive Producer