Anthony Ferraris

A new chief shakes things up at Firehouse 51; Violet and Novak work to uncover the truth behind a car crash; Cruz keeps a watchful eye on Severide and Damon's growing bond.

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

Severide investigates a suspicious high school fire; Novak gets an unexpected call; Violet brings a 51 firefighter onboard the ambulance for a shift.

Severide and Stella keep an eye out for Grant; Louie has Dawson questioning her dangerous career path; Casey's relationship with Susan Weller cools down; tensions between Borrelli and Boden reach a boiling point.

Casey finds himself in dangerous territory when working undercover to bring down a trafficking ring. Also, Dawson realises that her life is about to change, and a new candidate makes an unusual first impression.

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.