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"Infection, Part III" is the fourth episode of Season 7 of Chicago P.D. It is the conclusion of a three-part One Chicago Crossover event with spinoffs Chicago Fire and Chicago Med. The event starts with "Infection, Part I", and continues with "Infection, Part II" and concluding with said episode.

Summary[]

After zeroing in on the suspect responsible for the bio-terrorism that’s gripping Chicago, the PD prepares to undertake their biggest manhunt yet. Upton is torn between helping track down the perp and providing emotional support to the scared young girl that needs her. Voight fears his team is being sent on a wild goose chase.

Cast[]

Main Cast[]

Crossover Cast[]

Recurring Cast[]

Guest Cast[]

Promo[]