
A top 5-rated entertainment network, ION’s lineup includes a catalog of proven procedural series and original programming. Anchored by a collection of television’s most-watched dramas, ION’s schedule caters to its loyal binge-watching audience nationwide.
Sgt. Voight encourages Lt. Casey to go undercover in order to obtain proof of Jack Nesbitt's shady dealings; tensions grow between Otis and Severide; Herrmann helps another member of the firehouse.
Lt. Casey ends up in danger as he continues to investigate Jack Nesbitt; Boden tries to create unity in the house; Cruz and Boden put their lives on the line to save their own when a warehouse blaze gets out of control; Dawson receives news.
As the team works to bring down a drug ring, Voight builds trust with a new informant; however, it soon becomes clear she has a plan of her own.
As the team investigates the stabbing of a father with two young daughters, they begin to suspect there is more to the story than meets the eye; the FBI investigation into Roy Walton's death intensifies while Voight, Upton and Halstead feel the heat.
With the FBI closing in on the Roy Walton investigation, Voight and Halstead strategize a way out; after a city bus driver is shot by a passenger, the team investigates a possible abduction.
The team searches for a missing child in what turns out to be a very complicated case; Burgess and Ruzek are in for a shock when someone from Makayla's past comes forward.
Voight employs his new informant to help solve a tricky drug trafficking case; Atwater, who once again struggles to reconcile his personal and professional life, reaches a decision.
The team works together to identify the head of the brutal Los Temidos gang; Voight dives deeper into his informant Anna Avalos' past when her undercover role is threatened.