Goran Visnjic Dr. Luka Kovac Actor Maura Tierney Abby Lockhart Actor Mekhi Phifer Dr. Gregory Pratt Actor Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor Shane West Actor Scott Grimes Dr. Archie Morris Actor Laura Innes Dr. Kerry Weaver Actor Armand Assante Richard Elliot Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Deezer D Nurse Malik McGrath Guest Star Troy Evans Frank Martin Guest Star Lily Mariye Nurse Lily Jarvik Guest Star Jillian Bowen Katie Odachowski Guest Star Christopher Grove Dr. Marty Kline Guest Star Dominic Janes Alex Taggart Guest Star Jim Parrack Phil Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer