: After a deli owner named Ronnie collapses twice, the pair uses Narcan and medical sleuthing to find the cause.
Kelly Severide faces a leadership challenge when a new recruit with political ties struggles during training. Meanwhile, Brett and Violet investigate a mysterious note that leads them to uncover a local poisoning case. Major Storylines 1. Severide and the New Recruit Chicago Fire 9x11
: Severide trains a group of recruits, including Jacob Mercer , whose father is a high-ranking CFD official and friend of Chief Boden. : After a deli owner named Ronnie collapses
: Matthew Casey continues to hide the severity of his head injury and lingering headaches. Major Storylines 1
: They deduce Ronnie is being poisoned with muffins by his own wife. 3. Casey's Health Crisis
: Dr. Will Halstead (from Chicago Med ) advises him to see a neurologist.