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 Angela Bassett Dr. Cate Banfield Actor Leland Orser Dr. Lucien Dubenko Guest Star Charlotte Rae Roxanne Gaines Guest Star Laura Cerón Nurse Chuny Marquez Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Gil McKinney Dr. Paul Grady Guest Star Carlos Knight Zeke Guest Star Pat Lentz Nursing Supervisor Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer