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 Busy Philipps Hope Bobeck Guest Star Paula Malcomson Meg Riley Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Kip Pardue Ben Parker Guest Star Lois Smith Gracie Guest Star Michelle Hurd Courtney Brown Guest Star Michael Hyatt Yvonne Devilliere Guest Star Glenn Plummer Timmy Rawlins Guest Star Charlayne Woodard Angela Gilliam Guest Star Deezer D Nurse Malik McGrath Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer