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.D. Season 7, Episode 4 – "Infection, Part III". Episode Overview [S8E4] Infection, Part I
You can find this episode and the rest of the crossover on major streaming platforms and digital stores: Firehouse 51's first responders must work alongside the
Watch the full series on Peacock or through Sky Go . Episode 4 – "Infection
A rare but deadly "flesh-eating" bacteria begins spreading rapidly across the city .