Heidi Johanningmeier

Antonio's (Jon Seda) son was kidnapped and he has a feeling the Columbian drug gang is to blame. Pulpo (guest star Arturo Del Puerto), the Columbian gang leader, is being held in jail and suggests his release may trigger the release of Diego (guest star Zach Garcia). During the investigation, Halstead (Jesse Lee Soffer) learns some new information about Lindsay (Sophia Bush). Voight (Jason Beghe) offers Antonio a new approach to get information on Diego's whereabouts.

Voight (Jason Beghe) and team head to a house that's been associated with a number of top gangs. Events at the search result in Ruzek (Patrick Flueger), being encouraged to seek some counseling which may have lasting repercussions professionally and personally. Meanwhile Halstead's (Jesse Lee Soffer) temper rises when he comes in contact with some unwelcomed people from his past.

The district is in a state of change Lindsay has moved to New York and the CPD is under scrutiny about the corrupt nature of its institution. Under the watchful eye of the city, the team attempts to bust a gun deal that quickly turns dicey when innocent civilians and children get involved. Tension erupts when Chief Lugo (guest star Esai Morales) brings in Denny Woods (guest star Mykelti Williamson) to review the shootout, and Halstead (Jesse Lee Soffer) becomes a key player in the outcome of the case.

An urgent search for the cause of a series of deaths by radiation poisoning may ultimately lead to a very deadly volume in the New York City Library. (TV-14)

When the Injustice Defense Group is approached to exonerate a former frat boy, Daniel Hernandez, who is charged with rape and murder, a turn in Davon Watkins' case forces Madeline to head back to Ohio, leaving Easy and Bodie to solve this case alone before Easy’s mentor, Judge Fry.