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 John Leguizamo Dr. Victor Clemente Guest Star Kristen Johnston Actor Leland Orser Dr. Lucien Dubenko Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Troy Evans Frank Martin Guest Star Abraham Benrubi Jerry Markovic Guest Star China Shavers Olivia Evans Guest Star Deezer D Nurse Malik McGrath Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Kat Dennings Zoe Butler Guest Star April L. Hernandez Nurse Inez Guest Star Callie Thorne Jodie Kenyon Guest Star John Wells Executive Producer Christopher Chulack Executive Producer Michael Crichton Executive Producer Neal Baer Executive Producer David Zabel Executive Producer Jack Orman Executive Producer R. Scott Gemmill Executive Producer