Jimmy Nicholas

Javi spends a couple of shifts at Firehouse 51. Kidd and Carver work together to help Carver's former boss. As Hawkins and Violet's relationship blossoms, Gallo turns his attention elsewhere.

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.

The big wedding day arrives and Firehouse 51 welcomes Casey back to celebrate the joyous occasion; Emma's plans to replace Violet come to a shocking end.

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.

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.

Severide and Seager team up to investigate a fire at the home of a troubled young woman; Pelham moves into 51's rumoured cursed office; Kylie assists Kidd with Girls on Fire.