Twenty-One Guns

S12, E22: Chaos strikes when two injured convicts come into the emergency room and try to escape the authorities. With the help of an accomplice posing as an emergency medical technician, the fugitives involve one of the nurses in the melee. As the gunmen get more and more desperate to make it out of the hospital, they resort to extreme measures, putting Kovac in harm's way. Gunshots ring out in the lobby, and Abby slips to the ground. Meanwhile, Pratt tries to comfort Neela as she copes with Gallant's grieving parents.