Daniel Kyri

A rare but deadly bacteria takes its toll on numerous victims around the city, leaving Chicago's finest first responders to work together alongside the CDC to resolve the dangerous situation. Severide suspects something bigger is happening.

The mattress factory fire spirals out of control. Truck and squad lay it on the line in hopes of getting the trapped victims out alive.

Brett, Foster and Kidd take a road trip to Indiana and encounter an accident involving a boys' hockey team that leaves them relying on their instincts to save the injured. Plus, the rest of Firehouse 51 competes in the annual chili cook-off.

An awful storm causes a power outage and everyone works together to identify a small boy who mysteriously turns up at the station.

Casey and Severide disagree on a call, while Boden starts a diet and Brett's birth mother shares life-altering news. A familiar face has a proposition for Herrmann.

A suburban house fire involving a mother and son hits home for Casey and Gallo. Meanwhile, Kidd has a charitable idea to help give back to her community.