Phil Anthony Ridarelli

As the Intelligence Unit attempt to prevent a dangerous new weapon reaching the streets, a house search results in a traumatic incident for Ruzek.

The thwarted escapees return to their cells undetected, but a CO becomes suspicious about a broken pipe. Veronica and Nick ask a judge to postpone Lincoln's execution, and Sara asks her father, Governor Tancredi, to review Lincoln's case.

A call comes in from the Cook County Jail, the squad encounter a volatile predicament and are tasked with trying to defuse an escalating situation.

Boden, Kidd and Severide work together to protect one of their own; at the Fire Academy, Herrmann meets an inspiring young man; talk of the annual CFD Gala dominates the firehouse.

After photos of Casey and Severide jumping off the roof during a heroic rescue make the front page of the newspaper, Boden unwillingly agrees to have the photographer chronicle a day at the firehouse.

When a teenage boy is brutally murdered in Chinatown, Wysocki and Evers need Colvin's help to crack the case. Meanwhile, Liam goes deeper undercover.