Nick Boraine

When truck and squad are summoned to the scene of a dangerous accident, Chief Boden makes a split-second decision that overrides Chief Anderson, the incident commander whose house was the first to respond to the call.

After exercising his disdain and authority over Chief Boden, Chief Anderson reassigns members of 51 to various houses around town, citing the need for improvement. The ramifications are felt by the crew, who are left to make the best of their respective situations in their new surroundings.

The team is on high alert when a previous incident during a fire call leaves a dangerous man on the loose with a vendetta to target Lt. Casey and Firehouse 51, and prompts CPD to step in. Dennis Mack, a buddy firefighter of Severide's father, comes to town to shadow the squad but may have ulterior motives.

Gibbs and Vance finally let the team in on a case.

The discovery of dead bodies in a forest leads the team to the world of modern-day treasure hunting.

Carrie ventures a delicate alliance with her counterpart at Pakistan’s secretive Inter-Services Intelligence (ISI). Fara fails to recruit a key asset, forcing Carrie to intervene. Still reeling over events in Islamabad, Quinn zeroes in on a potential lead.