Chicago Fire Wiki

Infection: Part I is the fourth episode of the eighth season and the 163rd overall episode of Chicago Fire.


In the first part of a three-show crossover event, 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. Following a fire at a local university that ties into the outbreak, Severide has suspicions that something bigger is happening.


Main Cast