Maura Tierney Abby Lockhart Actor Mekhi Phifer Dr. Gregory Pratt Actor Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor Scott Grimes Dr. Archie Morris Actor John Stamos Dr. Tony Gates Actor David Lyons Dr. Simon Brenner Actor Sam Jones III Chaz Pratt Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Gina Ravera Dr. Bettina DeJesus Guest Star Tony Hale Norman Chapman Guest Star Charlotte Rae Roxanne Gaines Guest Star Deezer D Nurse Malik McGrath Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Julia Jones Kaya Montoya Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer