Arturo Del Puerto

In the series premiere, after a slew of brutal slayings, District 21, led by Sergeant Hank Voight (Jason Beghe) go after a Columbian drug cartel cleaning house in Chicago. They discover D'Anthony (guest star Isaac White) who proves to be an asset in the investigation. At District, complicated histories and unit rivalries surface which could end up costing them one of their own. Meanwhile, Rookie Kyle Ruzek (Patrick Flueger) is pulled from the police academy by Olinski (Elias Koteas) to join the team.

Glenn (Mark McKinney) drives Amy (America Ferrera) crazy with a new, over the top training system. Cheyenne (Nichole Bloom) and Mateo (Nico Santos) brainstorm a new business, while Dina (Lauren Ash) recruits Jonah (Ben Feldman) to help her when she starts second-guessing her own future.

When the CBI investigates the murder of an antiques dealer found dead in a museum, the evidence indicates that the suspect may be a member of the team.

The Jeffersonian team investigates the death of Jared Drew, an animal expo employee, and in the course of their investigation into his death, they enter the world of illegal animal trafficking. Meanwhile, Brennan thinks she would make an excellent presidential candidate, and Sweets and Daisy take on a big change in their relationship.

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.