'Chicago P.D.' Season 12 - 5 Cast Members Returning, 1 Is Leaving & 1 New Star Joins!

Chicago P.D. is returning in just a few weeks now!

Season 12 of the One Chicago series is set to premiere on Wednesday, September 25 at 10 p.m on NBC.

The show centers around the uniformed patrol officers and the Intelligence Unit of the 21st District of the Chicago Police Department as they go after the perpetrators of the city’s major street offenses.

Ahead of the show’s season premiere this September, we already know which stars are expected to return from the main cast, who is not returning, and a star joining the series.

Click through to see what we know about Season 12 of Chicago P.D. so far…