Dick Wolf's second spin-off from "Chicago Fire" follows the workaday challenges for another ensemble of Windy City crisis responders-the doctors and nurses staffing the emergency department at Chicago Gaffney Medical Center, as they strive to save lives among their interpersonal tensions. Nick Gehlfuss, Yaya DaCosta, Torrey DeVitto, S. Epatha Merkerson, and Oliver Platt star.20 episodes on 6 discs. 15 1/4 hrs. Widescreen (Enhanced); Soundtrack: English Dolby Digital 5.1; Subtitles: English (SDH), French; bonus "Chicago Fire" crossover episode; bonus "Chicago P.D." crossover episode.