Erin Breen

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

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 unwillingly agrees to let Dawson and Brett go undercover; Kidd and Zach's relationship hits a bump; Cruz has a hard time expressing his true feelings for Brett.

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

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.

Severide finds a connection between a recent salon fire and a case involving a serial arsonist. Plus, Firehouse 51 throws a retirement party.