WZRB-DT Lt. Severide tries to help a firefighter from Denver struggling with addiction; Shay and Dawson plan a girls' weekend at a cabin in the woods; Mills and the guys update Mouch's online dating profile. 2026-10-05 Surprised Dawson receives a suicide note; Severide looks into Bloom's dark past; Shay and Casey search for a life-changing item. 2026-10-05 A large explosion sends Chicago into chaos; the members of the firehouse are tested when one of their own goes missing in the blast. 2026-10-05 A call to the field may throw a wrench in Dawson's plan to retake the firefighter exam; the firehouse welcomes a new addition; Boden makes a bold move. 2026-10-05 Voight and the team pursue a ruthless crime ring whose business has hit close to home; as they dig deeper, the extent of the danger becomes more apparent; Deputy Superintendent Samantha Miller second-guesses her decisions. 2026-10-05 Voight and the team muster all their expertise to bring down a deadly crime ring; Burgess finds herself in a dangerous situation. 2026-10-06