Anthony Ferraris

Severide wants to implicate the serial arsonist, Dawson and Shay face the unexpected on a routine call, suspicions indicate Clarke is the mole, and Mouch campaigns for union president.

Severide comes back to work but isn't his usual self, Mills discovers more information about his father's family and Herrmann asks Molly investors to share ideas that could help turn the business around.

House 51 comes under investigation for negligence after interim chief Pridgen makes a grave tactical error during an apartment fire.

Severide investigates a fire at an abandoned store inhabited by squatters; Mouch pens a memoir about his life.

After a devastating fire erupts at a surgery center, Kidd works to hunt down the true cause. Violet, Novak and Vasquez grapple with shifting relationships. Molly's hosts its first trivia night.

The team transport the victims of a terrible chemical leak to Chicago Med, where a bad situation quickly turns seriously worse.