Robyn Coffin

Firehouse 51 must band together after a devastating fire catches them off guard. Vasquez continues his quest for answers.

Cruz hunts for the identity of an unknown ally. Mouch takes steps to help a friend. Vasquez must make a difficult choice.

Kidd must prove herself at the National Firefighter Leadership Conference, while the rest of Firehouse 51 is called to two eerily similar car wrecks. Mouch tries to keep the firehouse informed by starting a newsletter and Cruz deals with a heartbreak.

The Firehouse 51 crew have their work cut out for them when a tornado hits the city. Also, Brett must report Chilli after she makes a big mistake.

A call comes in from the Cook County Jail, the squad encounter a volatile predicament and are tasked with trying to defuse an escalating situation.

Brett fears for her life after witnessing a shooting on a call. Meanwhile, Mouch gets cold feet for his wedding, and Casey faces a tough test.