Keith Kupferer

Severide risks his job to help one of their own. Kidd navigates Natalie's complicated relationship with her sister. Herrmann prepares to take the Chief test.

Kidd and Natalie bond during a road trip. Severide uncovers surprising evidence in a car fire. Violet gets a career opportunity after being featured in the paper.

Viral. Cruz's torment jeopardizes his fellow firefighters.

No job is more stressful, dangerous or exhilarating than those of the Firefighters, Rescue Squad and Paramedics of Chicago Firehouse 51.

No job is more stressful, dangerous or exhilarating than those of the Firefighters, Rescue Squad and Paramedics of Chicago Firehouse.

In order to get Abruzzi back in command of the prison's work detail -- and the escape plan back on track -- Michael must give up Fibonnaci's location to Philly Falzone. Meanwhile, Michael and Dr. Sara grow closer as the escape gang grows by one. Outside the walls, Kellerman and Hale get some unwanted help tracking down LJ, and Veronica and Nick make a breakthrough.