

District 21 of the Chicago Police Department is made up of two distinctly different groups. There are the uniformed cops who patrol the beat and go head to head with the city's street crimes. And there's the Intelligence Unit, the team that combats the city's major offenses - organized crime, drug trafficking, high profile murders and beyond. These are their stories.

Season 1
15 episodes

Season 2
23 episodes

Season 3
23 episodes

Season 4
23 episodes

Season 5
22 episodes

Season 6
22 episodes

Season 7
20 episodes

Season 8
16 episodes

Season 9
22 episodes

Season 10
22 episodes

Season 11
13 episodes

Season 12
22 episodes

Season 13
21 episodes

Season 14
21 episodes

Jason Beghe
Sergeant Hank Voight

LaRoyce Hawkins
Officer Kevin Atwater

Marina Squerciati
Detective Kim Burgess

Patrick John Flueger
Officer Adam Ruzek

Amy Morton
Desk Sergeant Trudy Platt

Jesse Lee Soffer
Jay Halstead

Tracy Spiridakos
Special Agent Hailey Upton

Jon Seda
Detective Antonio Dawson