Criada por Ryan Murphy e Brad Falchuk (dupla por trás de American Horror Story e American Crime Story), a série aborda a vida e as carreiras de policiais, paramédicos, bombeiros – pessoas que põem suas vidas em risco para salvar a dos outros.

No elenco estão Angela Bassett (American Horror Story), Peter Krause (Six Feet Under, Parenthood, The Catch), Connie Britton (Friday Night Lights, American Horror Story, Nashville), Corinne Massiah (Mistresses) e Kenneth Choi (American Crime Story, The Last Man on Earth, Counterpart).

• Lista de Episódios •

5×01 – Panic
5×02 – Desperate Times
5×03 – Desperate Measures
5×04 – Home and Away
5×05 – Peer Pressure
5×06 – Brawl in Cell Block 9-1-1
5×07 – Ghost Stories
5×08 – Defend in Place
5×09 – Past is Prologue
5×10 – Wrapped in Red
5×11 – Outside Looking In
5×12 – Boston
5×13 – Fear-o-Phobia
5×14 – Dumb Luck
5×15 – Fomo
5×16 – May Day
5×17 – Hero Complex
5×18 – Starting Over (Season Finale)