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 Stanley Tucci Dr. Kevin Moretti Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Malaya Rivera Drew Katey Alvaro Guest Star Julia Ling Mae Lee Park Guest Star J.P. Manoux Dr. Dustin Crenshaw Guest Star Gina Ravera Dr. Bettina DeJesus Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Chloe Greenfield Sarah Riley Guest Star Lucinda Jenney Allison Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer