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 Justina Machado as Ms. Cruz Lisa Edelstein as Aggie Orton Gerald S. O'Loughlin as George Sherman Howard as Mr. Schoenberger Nicki Micheaux as Mrs. Williams Jessie Nelson as Bite Victim's Mother Summer Phoenix as Petra Darnell Williams as Theo Williams Jesse Borrego as HIV-Positive Patient Peter Birkenhead as Bite Victim's Father John Pleshette voices Stuart Curt Bisquera as Drummer 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 Matthew Fishman as Todd Lebeck David Stifel as Boz Carlos Alvarado as Gang Member Audrey Gelfund as Weeping Woman Googy Gress as Head Lac
