Synopsis

Following a disturbing revelation, Dawson turns to Severide for assistance. Meanwhile, Casey and Dawson grapple with a breakdown in their communication, while Brett and Kidd find themselves vying for the attention of Zach, a Hazmat officer. Elsewhere, Otis, Herrmann, and Mouch embark on a quest to identify the source of a pervasive and unpleasant odor that is disrupting life at Firehouse 51.