[s8e4] Infection, Part I -

Chicago P.D. Season 7, Episode 4 – "Infection, Part III". Episode Overview

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

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

As panic grows, the city's heroes face a race against time to identify the source of the bacteria before it becomes a full-blown epidemic. Where to Watch

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 . Chicago P

Individual episodes are available for purchase on Apple TV and Amazon Prime Video .

You can find this episode and the rest of the crossover on major streaming platforms and digital stores: It serves as the opening chapter of a

Watch the full series on Peacock or through Sky Go .