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 Chloe Greenfield Sarah Riley Guest Star Leland Orser Dr. Lucien Dubenko Guest Star Madison Davenport Claire O'Fallon Guest Star Liza Lapira Christine Guest Star Molly Price Mrs. O'Fallon Guest Star Glynn Turman Mr. Holmes Guest Star Montae Russell Dwight Zadro 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