Chicago PD dropped in raw A18-49 ratings less than any other scripted show on NBC, and it didn't even have a time slot upgrade. It's also their #3 scripted show, only behind This is Us and Chicago Fire. Despite this, it was only down 5% in its second season, and 2% in its third season, so this season actually had the steeper decline than the other seasons. So a great performance for NBC, and a just OK performance in relation to its previous seasons. The fact that it more or less stayed steady throughout the season for non-crossover episodes is a major achievement though.
Grade: A-