After witnessing a domestic dispute, Brett and Violet decide to take the investigation into their own hands. Mouch vets Truck 81’s new firefighter. Herrmann relies on something new to aid…

After witnessing a domestic dispute, Brett and Violet decide to take the investigation into their own hands. Mouch vets Truck 81’s new firefighter. Herrmann relies on something new to aid…

After a brutal shooting, Burgess and Ruzek find themselves trapped aboard the busy “L” subway. As they piece together scant evidence, the team is drawn into a dark family drama.