Erin Breen

Firehouse 51 responds to the scene of a harrowing blaze that endangers the lives of many, including one of the Chicago family.

Severide and Boden investigate a fire at a hair salon. A shocking discovery is made in the search for the missing piercing nozzle from Engine 27.

Nervous about Laurie's next steps, Richard takes matters into his own hands, letting his ego get the better of him during an interview. Dinesh, Gilfoyle and Jared misplace an important piece of hardware. Erlich faces unexpected pushback pitching his plans to Big Head.

Chief Boden turns up the pressure on Severide and Casey to investigate the cause of the fire that trapped his wife; Mouch is over-competitive in the firefighter muster challenge.

After the squad is unable to save a woman from a burning building, Severide and Casey disagree on a potential arson case.

While responding to a call, Dawson accidentally hits a pedestrian who steps out in front of the ambulance, and must deal with the repercussions.