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 Summer Phoenix as Petra Jesse Borrego as HIV-Positive Patient Nicki Micheaux as Mrs. Williams Curt Bisquera as Drummer Peter Birkenhead as Bite Victim's Father Darnell Williams as Theo Williams Sherman Howard as Mr. Schoenberger Gerald S. O'Loughlin as George Jessie Nelson as Bite Victim's Mother John Pleshette voices Stuart 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 Conni Marie Brazelton as Nurse Connie Oligario Montae Russell as Paramedic Dwight Zadro 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. David Stifel as Boz Matthew Fishman as Todd Lebeck Darion Basco as Justin Chang Carlos Alvarado as Gang Member Audrey Gelfund as Weeping Woman Googy Gress as Head Lac
