Carlos S. Sanchez

Severide is forced to overcome obstacles at the firehouse. Cruz finds himself at a loss amid the new changes in his family.

Every Scar Tells A Story. Javi spends a couple of shifts at Firehouse 51. Kidd and Carver work together to help Carver's former boss. As Hawkins and Violet's relationship blossoms, Gallo turns his attention elsewhere.

All Out Mystery. Severide and Kidd investigate an explosion at a jewelry store. Cruz and Chloe take steps to make Javi a permanent part of their family. Gallo, Ritter and Mouch try to bond with Carver.

The Magnificent City Of Chicago. The big wedding day arrives and Firehouse 51 welcomes Casey back to celebrate the joyous occasion. Emma's plans to replace Violet come to a shocking end.

Nemesis. Severide struggles with the cost of helping Det. Pryma with the Martucci case. Gallo campaigns for Herrmann to represent 51 at the National Firefighter's Association's Winter Conference. A familiar face makes a shocking return.

The First Symptom. Mouch builds a classic firetruck model for the Deputy District Chief but needs assistance from Gallo and Ritter. Brett and Violet encounter multiple victims with a strange set of symptoms.