DuShon Monique Brown

A call to the field may throw a wrench in Dawson's plan to retake the firefighter exam; the firehouse welcomes a new addition; Boden makes a bold move.

Firehouse 51 responds to a suspicious call from a neighbouring firehouse, so Severide and Cruz investigate. Also, the team welcome a new firefighter.

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.

Chief Boden is being investigated by internal affairs following complications at a call-out, and the crew become frustrated with the increased scrutiny.

Evidence found at a fire points towards an arsonist who has evaded capture for a decade; Dawson puts her life on the line.

The investigation of Chief Boden intensifies, so the pressure is on Firehouse 51 to find evidence that could clear his name.