After a frantic phone call tells Mr. Montclair his brother's transplanted heart flatlined but stabilized, the family learns the organ arrived late. Mr. Montclair demands who delayed the surgery. Surveillance footage and a flight attendant's confession reveal Ethan Harrington and Clara Everett were hooking up in the cockpit and the attendant (Celeste) admitted leaving Dr. Brooks stranded at the airport. Meanwhile conspirators plot to shut a cabin door when Dr. Brooks tries to board, ensuring Lucas Montclair's brother won't survive. Mrs. Montclair lashes out at Celeste; with the door-plot set, the brother's fate hangs on the next boarding.