Erik Hellman

When District 21 goes after a Colombian drug gang following a series of brutal slayings, an asset in the investigation emerges.

Antonio believes a Colombian gang is involved in his son's kidnapping; Halstead learns new information about Lindsay; Voight offers Antonio a new way to get information about Diego's whereabouts.

As Voight and his team search for the bombers, they realize there might be more bombs set to detonate; Burgess' niece fights for her life.

When a bartender takes a bullet intended for Halstead, the bounty on him becomes more real; following a tense interaction, Platt and Nadia reach an understanding.

Ruzek's future with the unit is in question after a botched undercover job; a corpse is discovered in an SUV; Lindsay and Halstead move forward with their relationship.

Kane grows increasingly infatuated with his new senior aide, Mona, allowing himself to get swept up in her passion for the subsidized housing project. Ben Zajac and his wife, Maggie, run the risk of alienating themselves from Kane when they take the reins of Zajac’s gubernatorial campaign.