Willis, Leanne and Jesse put their lives on the line to operate on an officer with an explosive bullet in her leg; Mario, Noa and Guthrie tend to a magician with breathing trouble.

A CODE BLACK at Angels Memorial takes a turn for the worse when a city- wide blackout leaves the hospital without power or back-up generators. As Campbell and Leanne divert high-risk patients to a nearby care center, Elliot and Heather are trapped in an elevator with a woman in labor, and Willis and Dr. Nolan try to help a 92-year-old woman who thinks it's 1942,