Special Guest Stars William H. Macy as Dr. David Morgenstern Guest Stars Ellen Crawford as Nurse Lydia Wright Brent Jennings as Nat Tracy Vilar as Doris Nick Offerman as Rog Lisa Edelstein as Aggie Orton Justina Machado as Ms. Cruz Summer Phoenix as Petra Nicki Micheaux as Mrs. Williams Peter Birkenhead as Bite Victim's Father Darnell Williams as Theo Williams Sherman Howard as Mr. Schoenberger Jessie Nelson as Bite Victim's Mother Gerald S. O'Loughlin as George John Pleshette voices Stuart Curt Bisquera as Drummer Jesse Borrego as HIV-Positive Patient Co Starring Laura Cerón as Nurse Chuny Marquez Deezer D as Nurse Malik McGrath Emily Wagner as Paramedic Doris Pickman Lyn Alicia Henderson as Paramedic Pamela Olbes Lily Mariye as Nurse Lily Jarvik Montae Russell as Paramedic Dwight Zadro Conni Marie Brazelton as Nurse Connie Oligario Kristin Minter as Randi Fronczak J.P. Hubbell as EMT Lars Audia François Chau as Neuro Resident Silas Weir Mitchell as Luis John Hawkes as P.A. Darion Basco as Justin Chang Googy Gress as Head Lac Audrey Gelfund as Weeping Woman David Stifel as Boz Carlos Alvarado as Gang Member Matthew Fishman as Todd Lebeck
