Guest Stars Gregory Calderone as Dr. Billy Scott Don McKellar as Dr. Amos Carver Jonathan Koensgen as Officer Austin Bauer Alain Goulem as Elias Owen Maggs as Hunter Rush Co Starring Emily Pope as Nurse Katrina Trish Fagan as Dr. O'Toole Cyril Serrick as Tim the Perfusionist Cynthia Preston as Lindsay Rush Mena Massoud as Justin Srinivasan Dan Redican as Guy Kevin Bundy as Greg Rush