Jimmy Nicholas

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

Boden, Kidd and Severide work together to protect one of their own; at the Fire Academy, Herrmann meets an inspiring young man; talk of the annual CFD Gala dominates the firehouse.

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.

On a call with Station 37, a firefighter is struck by a power line and decides to lash out after her injury; Brett is visited by Scott and Amelia; Violet gets a surprise envelope; the rest of 51 enters a contest.

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.

Gallo, Violet and Ritter debut their microbrewery business at Winterfest; Brett prepares to present her paramedicine programme to an oversight panel; Firehouse 51 gets in the holiday spirit.