第 9 季，第 1 集: For the emergency room personnel and doctors of Chicago's County General Hospital, the difference between life and death often depends on split-second decisions. The staff of heroic healers includes Chief Resident John Carter, Chief of Emergency Medicine Kerry Weaver, Dr. Elizabeth Corday, Dr. Robert Romano, Attending Physician Dr. Luka Kovac, nurse Abby Lockhart, Dr. Susan Lewis, Attending Physician Dr. Jing-Mei Chen, fourth-year medical student Michael Gallant and intern Dr. Gregory Pratt. The hospital remains in lockdown while the Centers for Disease Control and Prevention probes a mysterious and deadly illness that requires Carter, Abby and others to be quarantined. Left alone, Lewis fights to save a patient. Carter and Abby discuss their future together as they idle away several days in quarantine with Chen and Pratt, along with chronic patient Stan the Can.