Chicago P.D. · Season 7 · Episode 4

“Infection, Part III”

Aired Thursday 17 October 2019

After zeroing in on the suspect responsible for the bioterrorism 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.

S7 E4 discussion