SeriesUpdate

NEED TO KNOW The One Chicago Crossover, featuring Chicago Med, Chicago Fire and Chicago P.D., brought back former P.D. stars Tracy Spiridakos and Jay Halstead as Hailey Upton and Jay Halstead The three-hour episode ended with them having an important conversation The actors, and the three showrunners, talk to PEOPLE about key moments in the crossover One Chicago Crossover Ending