Mouch builds a classic firetruck model for the Deputy District Chief, but quickly needs some assistance from Gallo and Ritter.

Brett and Violet encounter multiple victims with a strange set of symptoms.

The results of Cindy’s chemotherapy loom over the Herrmann family.

Air Date: Wednesday, March 29 (09:00PM – 10:00PM) on NBC.


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CHICAGO FIRE -- "The First Symptom" Episode 1117 -- Pictured: (l-r) Hanako Greensmith as Violet, David Eigenberg as Christopher Herrmann, Kara Killmer as Sylvie Brett, Milica Govich as Lori, Miranda Rae Mayo as Stella Kidd -- (Photo by: Adrian S Burrows Sr/NBC)