Jimmy Nicholas

Elizabeth must act quick after she learns that someone with ties to the Saudi government funded a terrorist bombing.

Kidd and Severide's honeymoon is interrupted by a dangerous person from their past; Kidd's former academy classmate joins Firehouse 51; Brett and Violet reflect on their relationships.

Severide and Kidd work with CPD regarding a suspicious car wreck; Hawkins and Violet's relationship is in jeopardy; Chloe and Cruz adjust to a new family dynamic.

Chief Hawkins goes above and beyond to help Brett and Violet with a problem; Kidd pursues an open lieutenant position; a blast from the past asks Mouch and Herrmann for a favour.

Stella Kidd returns to Firehouse 51; the team must work together to put out a potassium fire in a tunnel; after that incident, Ritter begins to worry about a young cop who witnessed the fiery death of a truck driver.

Cruz forms a bond with a young immigrant boy he meets while fighting a flat fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.