CHICAGO, IL - SEPTEMBER 10: Eamonn Walker attends the 2018 press day for "Chicago Fire", "Chicago PD", and "Chicago Med" on September 10, 2018 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)
CHICAGO, IL - SEPTEMBER 10: Eamonn Walker attends the 2018 press day for "Chicago Fire", "Chicago PD", and "Chicago Med" on September 10, 2018 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)