Boden makes a decision that impacts the race for Deputy Commissioner.
In the season 8 premiere, 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.
A familiar face returns to Firehouse 51 to serve with Kidd on a special task force.
Stella Kidd returns to Firehouse 51. The team must work together to put out a potassium fire in a tunnel. After that incident, Ritter begins to worry about a young cop who witnessed the fiery death of a truck driver.
A series of mysterious gas leaks has members of Firehouse 51 puzzled and spread thin. Brett's conflicted when her birth mother gets serious about tracking her down. Severide misunderstands his role as Cruz's best man. Mouch bites off more than he can chew.