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 Lisa Edelstein as Aggie Orton Justina Machado as Ms. Cruz Nick Offerman as Rog Summer Phoenix as Petra Nicki Micheaux as Mrs. Williams Gerald S. O'Loughlin as George Jesse Borrego as HIV-Positive Patient Peter Birkenhead as Bite Victim's Father Darnell Williams as Theo Williams Sherman Howard as Mr. Schoenberger Jessie Nelson as Bite Victim's Mother Curt Bisquera as Drummer John Pleshette voices Stuart Co Starring Deezer D as Nurse Malik McGrath Conni Marie Brazelton as Nurse Connie Oligario Emily Wagner as Paramedic Doris Pickman Laura Cerón as Nurse Chuny Marquez Lily Mariye as Nurse Lily Jarvik Montae Russell as Paramedic Dwight Zadro Lyn Alicia Henderson as Paramedic Pamela Olbes 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 Matthew Fishman as Todd Lebeck David Stifel as Boz Carlos Alvarado as Gang Member Audrey Gelfund as Weeping Woman Googy Gress as Head Lac
