The story begins during a Chicago Bears tailgate at Soldier Field, where a man collapses with a horrific, fast-moving infection .
Firehouse 51's first responders must work alongside the medical team at Gaffney Chicago Medical Center to contain the outbreak while the Intelligence Unit from Chicago P.D. investigates if the infection was spread intentionally .
Because this episode is part of a continuous storyline, you must watch the following episodes in order to see the full narrative: [S8E4] Infection, Part I
Chicago Fire Season 8, Episode 4 – "Infection, Part I" .
You can find this episode and the rest of the crossover on major streaming platforms and digital stores: The story begins during a Chicago Bears tailgate
Chicago Med Season 5, Episode 4 – "Infection, Part II" .
Chicago P.D. Season 7, Episode 4 – "Infection, Part III". Episode Overview Because this episode is part of a continuous
is the fourth episode of Season 8 of the action-drama series Chicago Fire . It serves as the opening chapter of a massive three-part crossover event within the Chicago franchise, involving characters from Chicago Fire , Chicago Med , and Chicago P.D. . Crossover Viewing Order