Howie Johnson

With tensions still running high between Chief Boden and Bennie Severide, things boil over when Mills confronts Bennie about the fire that killed his father.

New-to-the-crew Sylvie shines as the crew answer three dramatic call-outs. Casey asks Newhouse to help dig up dirt on his sister's husband.

The team investigate the links between a crime lord and a deranged artist who may have been using his skills to create something less than legal.

Herrmann must make a tough decision, and Casey tries to keep a tornado shelter open. Meanwhile, Brett and Dawson feel the effects of their actions.

Voight breaks the rules again when the FBI forbid him to question an Argentinian official at the World Trade Conference who is suspected of murdering a young female protester. Meanwhile, Halstead's brother arrives in town.

A lavish groundbreaking of the modernised O'Hare terminals cements Kane's legacy. Despite his seemingly bright political future, Kane continues to struggle with his disease.