Lángoló Chicago

Firehouse 51 is forced to share its space with Firehouse 17. Kidd and Herrmann fight over Ritter. An arson case tests Kidd and Severide's relationship. Firehouse 51 says goodbye to one of its own.

Mouch sets out to change his legacy and nickname.

After witnessing a domestic dispute, Brett and Violet decide to take the investigation into their own hands.

Boden's stepson returns, desperate for Boden to help his mother; after a child starts a fire in her backyard, Kidd and her team decide to dig deeper.

After their defibrillator malfunctions on a call, Brett and Violet search for answers; a secret from Gibson's past comes to light.

Firehouse 51 welcomes back some familiar faces and says goodbye to Brett; a call at the expo centre takes a shocking turn.

Violet clashes with her new partner; Severide discovers a hidden stash of money on a call and squares off against the cops working the case.

A hazmat call at a dialysis centre leads to a shocking discovery; Boden clashes with Robinson; Carver notices a change in Gibson's behaviour.

Severide, Kidd, and Van Meter investigate a fire at a recording studio; Kylie helps James keep a secret from Boden.

Severide steps in as ranking officer at 51; Kidd fights to save her Girls on Fire programme; Cruz's family is threatened.

Severide goes for an unexpected ride on Truck 81; Ritter's worlds collide when his secret boyfriend helps 51 track down Severide and the missing rig.

Severide and Violet risk clashing with Robinson after Lennox makes a dangerous decision; Cruz and Chloe's marriage problems come to a head.

Boden makes a decision that impacts the race for deputy commissioner; a tense call brings up painful memories for Carver and Damon.