Anthony Ferraris

Severide and Kidd welcome a surprise visitor; Herrmann and Cindy renew their vows; Mouch receives some encouraging news.

Severide is forced to crack open a cold case buried for decades; a routine call hits too close to home for Novak.

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.

A Nuisance Call. Internal issues threaten to derail Engine Company 51.

Always. Boden pulls his team together in the aftermath of the explosion. Casey works to track down Severide. Newhouse brings news about one of Mills' relatives. Herrmann and Otis come up with new goals.