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 John Aylward Dr. Donald Anspaugh Guest Star J.P. Manoux Dr. Dustin Crenshaw Guest Star Gil McKinney Dr. Paul Grady Guest Star Troy Evans Frank Martin Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Julia Jones Dr. Kaya Montoya Guest Star Shiri Appleby Dr. Daria Wade Guest Star Julian Morris Dr. Andrew Wade Guest Star Christopher Chulack Executive Producer Michael Crichton Executive Producer David Zabel Executive Producer John Wells Executive Producer R. Scott Gemmill Executive Producer