Parminder Nagra Dr. Neela Rasgotra Actor Linda Cardellini Nurse Samantha Taggart Actor John Stamos Dr. Tony Gates Actor Scott Grimes Dr. Archie Morris Actor David Lyons Dr. Simon Brenner Actor Angela Bassett Dr. Cate Banfield Actor Noah Wyle Dr. John Carter Guest Star Eriq La Salle Dr. Peter Benton Guest Star Ernest Borgnine Paul Manning Guest Star Julianna Margulies Head Nurse Carol Hathaway Guest Star Susan Sarandon Nora Guest Star George Clooney Dr. Doug Ross Guest Star Christian Clemenson Dr. Kurtag Guest Star Hedy Burress Joanie Moore Guest Star Yvette Freeman Nurse Haleh Adams Guest Star Ariel Winter Lucy Moore Guest Star David Zabel Executive Producer John Wells Executive Producer