Firehouse 51 prepares for their semi-annual firehouse inspection. Brett fights to save her paramedicine program. Commander Martin Pearce asks Severide for a favor.

Kidd and Severide’s honeymoon is interrupted by a dangerous person from their past. Kidd’s former academy classmate joins Firehouse 51. Brett and Violet reflect on their relationships.

The son of Alicia’s former friends is charged with felony murder, and Alicia decides to defend him, despite the fact that they ostracized her ever since the scandal.

Three years after millions of people – some 2% of the world’s population – vanished into thin air, residents of Mapleton, NY weigh the pros and cons of a “Heroes…

Three years after millions of people – some 2% of the world’s population – vanished into thin air, residents of Mapleton, NY weigh the pros and cons of a “Heroes…

The investigation into a fatal traffic accident leads Fontana and Green to a slaughtered hunting party in the woods and an unknown man who may have been pursuing vigilante justice.