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 John Stamos Dr. Tony Gates Actor Paula Malcomson Meg Riley Guest Star Forest Whitaker Curtis Ames Guest Star Keith David Pastor Watkins Guest Star Kip Pardue Ben Parker Guest Star Lois Smith Gracie Guest Star Fred Ward Eddie Wyczenski Guest Star Glenn Plummer Timmy Rawlins Guest Star Chloe Greenfield Sarah Riley Guest Star Lily Mariye Nurse Lily Jarvik Guest Star Alaina Reed-Hall Betty Dixon Guest Star Dominic Janes Alex Taggart Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer