Chicago P.D. is back tonight (Wednesday, October 1) at 10 p.m. ET on NBC !

Season 13 of the One Chicago series continues to follow the patrol officers and the Intelligence Unit of the 21st District of the Chicago Police Department as they take on the city’s most dangerous crimes, while balancing personal struggles and loyalty to the badge.

Ahead of the premiere, we now know which stars are expected to return, and at least one cast member who will exit the show. Plus someone new is joining the cast this season.

Click through to see who’s leaving, joining and who’s back for Season 13 of Chicago P.D. so far…

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