A riveting police drama about the men and women of the Chicago Police Department's District 21 who put it all on the line to serve and protect their community. District 21 is made up of two distinctly different groups: the uniformed cops who patrol the beat and go head-to-head with the city's street crimes and the Intelligence Unit that combats the city's major offenses - organized crime, drug trafficking, high profile murders and beyond.
 | Season 1 Episode 1 Stepping Stone Air Date: 2014-01-08 Duration: 60 min |
 | Season 1 Episode 2 Wrong Side of the Bars Air Date: 2014-01-15 Duration: 60 min |
 | Season 1 Episode 3 Chin Check Air Date: 2014-01-22 Duration: 60 min |
 | Season 1 Episode 4 Now is Always Temporary Air Date: 2014-01-29 Duration: 60 min |
 | Season 1 Episode 5 Thirty Balloons Air Date: 2014-02-05 Duration: 60 min |
 | Season 1 Episode 6 Conventions Air Date: 2014-02-26 Duration: 60 min |
 | Season 1 Episode 7 The Price We Pay Air Date: 2014-03-05 Duration: 60 min |
 | Season 1 Episode 8 Different Mistakes Air Date: 2014-03-12 Duration: 60 min |
 | Season 1 Episode 9 A Material Witness Air Date: 2014-03-19 Duration: 60 min |
 | Season 1 Episode 10 At Least It's Justice Air Date: 2014-04-02 Duration: 60 min |
 | Season 1 Episode 11 Turn the Light Off Air Date: 2014-04-09 Duration: 60 min |
 | Season 1 Episode 12 8:30 PM Air Date: 2014-04-30 Duration: 60 min |
 | Season 1 Episode 13 My Way Air Date: 2014-05-07 Duration: 60 min |
 | Season 1 Episode 14 The Docks Air Date: 2014-05-14 Duration: 60 min |
 | Season 1 Episode 15 A Beautiful Friendship Air Date: 2014-05-21 Duration: 60 min |
 | Season 2 Episode 1 Call It Macaroni Air Date: 2014-09-24 Duration: 60 min |
 | Season 2 Episode 2 Get My Cigarettes Air Date: 2014-10-01 Duration: 60 min |
 | Season 2 Episode 3 The Weigh Station Air Date: 2014-10-08 Duration: 60 min |
 | Season 2 Episode 4 Chicken, Dynamite, Chainsaw Air Date: 2014-10-15 Duration: 60 min |
 | Season 2 Episode 5 An Honest Woman Air Date: 2014-10-22 Duration: 60 min |
 | Season 2 Episode 6 Prison Ball Air Date: 2014-11-05 Duration: 60 min |
 | Season 2 Episode 7 They'll Have to Go Through Me Air Date: 2014-11-12 Duration: 60 min |
 | Season 2 Episode 8 Assignment of the Year Air Date: 2014-11-19 Duration: 60 min |
 | Season 2 Episode 9 Called in Dead Air Date: 2014-12-10 Duration: 60 min |
 | Season 2 Episode 10 Shouldn't Have Been Alone Air Date: 2015-01-07 Duration: 60 min |
 | Season 2 Episode 11 We Don't Work Together Anymore Air Date: 2015-01-14 Duration: 60 min |
 | Season 2 Episode 12 Disco Bob Air Date: 2015-01-21 Duration: 60 min |
 | Season 2 Episode 13 A Little Devil Complex Air Date: 2015-02-04 Duration: 60 min |
 | Season 2 Episode 14 Erin's Mom Air Date: 2015-02-11 Duration: 60 min |
 | Season 2 Episode 15 What Do You Do Air Date: 2015-02-18 Duration: 60 min |
 | Season 2 Episode 16 What Puts You on That Ledge Air Date: 2015-02-25 Duration: 60 min |
 | Season 2 Episode 17 Say Her Real Name Air Date: 2015-03-25 Duration: 60 min |
 | Season 2 Episode 18 Get Back to Even Air Date: 2015-04-01 Duration: 60 min |
 | Season 2 Episode 19 The Three G's Air Date: 2015-04-08 Duration: 60 min |
 | Season 2 Episode 20 The Number of Rats Air Date: 2015-04-29 Duration: 60 min |
 | Season 2 Episode 21 There's My Girl Air Date: 2015-05-06 Duration: 60 min |
 | Season 2 Episode 22 Push the Pain Away Air Date: 2015-05-13 Duration: 60 min |
 | Season 2 Episode 23 Born Into Bad News Air Date: 2015-05-20 Duration: 60 min |
 | Season 3 Episode 1 Life is Fluid Air Date: 2015-09-30 Duration: 60 min |
 | Season 3 Episode 2 Natural Born Storyteller Air Date: 2015-10-07 Duration: 60 min |
 | Season 3 Episode 3 Actual Physical Violence Air Date: 2015-10-14 Duration: 60 min |
 | Season 3 Episode 4 Debts of the Past Air Date: 2015-10-21 Duration: 60 min |
 | Season 3 Episode 5 Climbing Into Bed Air Date: 2015-10-28 Duration: 60 min |
 | Season 3 Episode 6 You Never Know Who's Who Air Date: 2015-10-28 Duration: 60 min |
 | Season 3 Episode 7 A Dead Kid, a Notebook and a Lot of Maybes Air Date: 2015-11-04 Duration: 60 min |
 | Season 3 Episode 8 Forget My Name Air Date: 2015-11-11 Duration: 60 min |
 | Season 3 Episode 9 Never Forget I Love You Air Date: 2015-11-18 Duration: 60 min |
 | Season 3 Episode 10 Now I'm God Air Date: 2016-01-06 Duration: 60 min |
 | Season 3 Episode 11 Knocked the Family Right Out Air Date: 2016-01-13 Duration: 60 min |
 | Season 3 Episode 12 Looking Out for Stateville Air Date: 2016-01-20 Duration: 60 min |
 | Season 3 Episode 13 Hit Me Air Date: 2016-02-03 Duration: 60 min |
 | Season 3 Episode 14 The Song of Gregory Williams Yates Air Date: 2016-02-10 Duration: 60 min |
 | Season 3 Episode 15 A Night Owl Air Date: 2016-02-17 Duration: 60 min |
 | Season 3 Episode 16 The Cases That Need to Be Solved Air Date: 2016-02-24 Duration: 60 min |
 | Season 3 Episode 17 Forty-Caliber Bread Crumb Air Date: 2016-03-02 Duration: 60 min |
 | Season 3 Episode 18 Kasual with a K Air Date: 2016-03-23 Duration: 60 min |
 | Season 3 Episode 19 If We Were Normal Air Date: 2016-03-30 Duration: 60 min |
 | Season 3 Episode 20 In a Duffel Bag Air Date: 2016-05-04 Duration: 60 min |
 | Season 3 Episode 21 Justice Air Date: 2016-05-11 Duration: 60 min |
 | Season 3 Episode 22 She's Got Us Air Date: 2016-05-18 Duration: 60 min |
 | Season 3 Episode 23 Start Digging Air Date: 2016-05-25 Duration: 60 min |
 | Season 4 Episode 1 The Silos Air Date: 2016-09-21 Duration: 60 min |
 | Season 4 Episode 2 Made a Wrong Turn Air Date: 2016-09-28 Duration: 60 min |
 | Season 4 Episode 3 All Cylinders Firing Air Date: 2016-10-05 Duration: 60 min |
 | Season 4 Episode 4 Big Friends, Big Enemies Air Date: 2016-10-12 Duration: 60 min |
 | Season 4 Episode 5 A War Zone Air Date: 2016-10-26 Duration: 60 min |
 | Season 4 Episode 6 Some Friend Air Date: 2016-11-09 Duration: 60 min |
 | Season 4 Episode 7 300,000 Likes Air Date: 2016-11-16 Duration: 60 min |
 | Season 4 Episode 8 A Shot Heard Round the World Air Date: 2016-11-16 Duration: 60 min |
 | Season 4 Episode 9 Don't Bury This Case Air Date: 2017-01-03 Duration: 60 min |
 | Season 4 Episode 10 Don't Read the News Air Date: 2017-01-04 Duration: 60 min |
 | Season 4 Episode 11 You Wish Air Date: 2017-01-11 Duration: 60 min |
 | Season 4 Episode 12 Sanctuary Air Date: 2017-01-18 Duration: 60 min |
 | Season 4 Episode 13 I Remember Her Now Air Date: 2017-02-08 Duration: 60 min |
 | Season 4 Episode 14 Seven Indictments Air Date: 2017-02-15 Duration: 60 min |
 | Season 4 Episode 15 Favor, Affection, Malice or Ill-Will Air Date: 2017-02-22 Duration: 60 min |
 | Season 4 Episode 16 Emotional Proximity Air Date: 2017-03-01 Duration: 60 min |
 | Season 4 Episode 17 Remember the Devil Air Date: 2017-03-22 Duration: 60 min |
 | Season 4 Episode 18 Little Bit of Light Air Date: 2017-03-29 Duration: 60 min |
 | Season 4 Episode 19 Last Minute Resistance Air Date: 2017-04-05 Duration: 60 min |
 | Season 4 Episode 20 Grasping for Salvation Air Date: 2017-04-26 Duration: 60 min |
 | Season 4 Episode 21 Fagin Air Date: 2017-05-03 Duration: 60 min |
 | Season 4 Episode 22 Army of One Air Date: 2017-05-10 Duration: 60 min |
 | Season 4 Episode 23 Fork in the Road Air Date: 2017-05-17 Duration: 60 min |
 | Season 5 Episode 1 Reform Air Date: 2017-09-27 Duration: 60 min |
 | Season 5 Episode 2 The Thing About Heroes Air Date: 2017-10-04 Duration: 60 min |
 | Season 5 Episode 3 Promise Air Date: 2017-10-11 Duration: 60 min |
 | Season 5 Episode 4 Snitch Air Date: 2017-10-18 Duration: 60 min |
 | Season 5 Episode 5 Home Air Date: 2017-10-25 Duration: 60 min |
 | Season 5 Episode 6 Fallen Air Date: 2017-11-08 Duration: 60 min |
 | Season 5 Episode 7 Care Under Fire Air Date: 2017-11-15 Duration: 60 min |
 | Season 5 Episode 8 Politics Air Date: 2017-11-29 Duration: 60 min |
 | Season 5 Episode 9 Monster Air Date: 2017-12-06 Duration: 60 min |
 | Season 5 Episode 10 Rabbit Hole Air Date: 2018-01-03 Duration: 60 min |
 | Season 5 Episode 11 Confidential Air Date: 2018-01-10 Duration: 60 min |
 | Season 5 Episode 12 Captive Air Date: 2018-01-17 Duration: 60 min |
 | Season 5 Episode 13 Chasing Monsters Air Date: 2018-01-31 Duration: 60 min |
 | Season 5 Episode 14 Anthem Air Date: 2018-02-07 Duration: 60 min |
 | Season 5 Episode 15 Sisterhood Air Date: 2018-02-28 Duration: 60 min |
 | Season 5 Episode 16 Profiles Air Date: 2018-03-07 Duration: 60 min |
 | Season 5 Episode 17 Breaking Point Air Date: 2018-03-14 Duration: 60 min |
 | Season 5 Episode 18 Ghosts Air Date: 2018-03-21 Duration: 60 min |
 | Season 5 Episode 19 Payback Air Date: 2018-04-11 Duration: 60 min |
 | Season 5 Episode 20 Saved Air Date: 2018-04-18 Duration: 60 min |
 | Season 5 Episode 21 Allegiance Air Date: 2018-05-02 Duration: 60 min |
 | Season 5 Episode 22 Homecoming Air Date: 2018-05-09 Duration: 60 min |
 | Season 6 Episode 1 New Normal Air Date: 2018-09-26 Duration: 60 min |
 | Season 6 Episode 2 Endings Air Date: 2018-10-03 Duration: 60 min |
 | Season 6 Episode 3 Bad Boys Air Date: 2018-10-10 Duration: 60 min |
 | Season 6 Episode 4 Ride Along Air Date: 2018-10-17 Duration: 60 min |
 | Season 6 Episode 5 Fathers and Sons Air Date: 2018-10-24 Duration: 60 min |
 | Season 6 Episode 6 True or False Air Date: 2018-10-31 Duration: 60 min |
 | Season 6 Episode 7 Trigger Air Date: 2018-11-07 Duration: 60 min |
 | Season 6 Episode 8 Black and Blue Air Date: 2018-11-14 Duration: 60 min |
 | Season 6 Episode 9 Descent Air Date: 2018-12-05 Duration: 60 min |
 | Season 6 Episode 10 Brotherhood Air Date: 2019-01-09 Duration: 60 min |
 | Season 6 Episode 11 Trust Air Date: 2019-01-16 Duration: 60 min |
 | Season 6 Episode 12 Outrage Air Date: 2019-01-23 Duration: 60 min |
 | Season 6 Episode 13 Night in Chicago Air Date: 2019-02-06 Duration: 60 min |
 | Season 6 Episode 14 Ties That Bind Air Date: 2019-02-13 Duration: 60 min |
 | Season 6 Episode 15 Good Men Air Date: 2019-02-20 Duration: 60 min |
 | Season 6 Episode 16 The Forgotten Air Date: 2019-02-27 Duration: 60 min |
 | Season 6 Episode 17 Pain Killer Air Date: 2019-03-27 Duration: 60 min |
 | Season 6 Episode 18 This City Air Date: 2019-04-03 Duration: 60 min |
 | Season 6 Episode 19 What Could Have Been Air Date: 2019-04-24 Duration: 60 min |
 | Season 6 Episode 20 Sacrifice Air Date: 2019-05-08 Duration: 60 min |
 | Season 6 Episode 21 Confession Air Date: 2019-05-15 Duration: 60 min |
 | Season 6 Episode 22 Reckoning Air Date: 2019-05-22 Duration: 60 min |
 | Season 7 Episode 1 Doubt Air Date: 2019-09-25 Duration: 60 min |
 | Season 7 Episode 2 Assets Air Date: 2019-10-02 Duration: 60 min |
 | Season 7 Episode 3 Familia Air Date: 2019-10-09 Duration: 60 min |
 | Season 7 Episode 4 Infection, Part III Air Date: 2019-10-16 Duration: 60 min |
 | Season 7 Episode 5 Brother's Keeper Air Date: 2019-10-23 Duration: 60 min |
 | Season 7 Episode 6 False Positive Air Date: 2019-10-30 Duration: 60 min |
 | Season 7 Episode 7 Informant Air Date: 2019-11-06 Duration: 60 min |
 | Season 7 Episode 8 No Regrets Air Date: 2019-11-13 Duration: 60 min |
 | Season 7 Episode 9 Absolution Air Date: 2019-11-20 Duration: 60 min |
 | Season 7 Episode 10 Mercy Air Date: 2020-01-08 Duration: 60 min |
 | Season 7 Episode 11 43rd and Normal Air Date: 2020-01-15 Duration: 60 min |
 | Season 7 Episode 12 The Devil You Know Air Date: 2020-01-22 Duration: 60 min |
 | Season 7 Episode 13 I Was Here Air Date: 2020-02-05 Duration: 60 min |
 | Season 7 Episode 14 Center Mass Air Date: 2020-02-12 Duration: 60 min |
 | Season 7 Episode 15 Burden of Truth Air Date: 2020-02-26 Duration: 60 min |
 | Season 7 Episode 16 Intimate Violence Air Date: 2020-03-04 Duration: 60 min |
 | Season 7 Episode 17 Before the Fall Air Date: 2020-03-18 Duration: 60 min |
 | Season 7 Episode 18 Lines Air Date: 2020-03-25 Duration: 60 min |
 | Season 7 Episode 19 Buried Secrets Air Date: 2020-04-08 Duration: 60 min |
 | Season 7 Episode 20 Silence of the Night Air Date: 2020-04-15 Duration: 60 min |
 | Season 8 Episode 1 Fighting Ghosts Air Date: 2020-11-11 Duration: 60 min |
 | Season 8 Episode 2 White Knuckle Air Date: 2020-11-18 Duration: 60 min |
 | Season 8 Episode 3 Tender Age Air Date: 2021-01-13 Duration: 60 min |
 | Season 8 Episode 4 Unforgiven Air Date: 2021-01-27 Duration: 60 min |
 | Season 8 Episode 5 In Your Care Air Date: 2021-02-03 Duration: 60 min |
 | Season 8 Episode 6 Equal Justice Air Date: 2021-02-10 Duration: 60 min |
 | Season 8 Episode 7 Instinct Air Date: 2021-02-17 Duration: 60 min |
 | Season 8 Episode 8 Protect and Serve Air Date: 2021-03-10 Duration: 60 min |
 | Season 8 Episode 9 Impossible Dream Air Date: 2021-03-17 Duration: 60 min |
 | Season 8 Episode 10 The Radical Truth Air Date: 2021-03-31 Duration: 60 min |
 | Season 8 Episode 11 Signs of Violence Air Date: 2021-04-07 Duration: 60 min |
 | Season 8 Episode 12 Due Process Air Date: 2021-04-21 Duration: 60 min |
 | Season 8 Episode 13 Trouble Dolls Air Date: 2021-05-05 Duration: 60 min |
 | Season 8 Episode 14 Safe Air Date: 2021-05-12 Duration: 60 min |
 | Season 8 Episode 15 The Right Thing Air Date: 2021-05-19 Duration: 60 min |
 | Season 8 Episode 16 The Other Side Air Date: 2021-05-26 Duration: 60 min |
 | Season 9 Episode 1 Closure Air Date: 2021-09-22 Duration: 60 min |
 | Season 9 Episode 2 Rage Air Date: 2021-09-29 Duration: 60 min |
 | Season 9 Episode 3 The One Next to Me Air Date: 2021-10-06 Duration: 60 min |
 | Season 9 Episode 4 In the Dark Air Date: 2021-10-13 Duration: 60 min |
 | Season 9 Episode 5 Burnside Air Date: 2021-10-20 Duration: 60 min |
 | Season 9 Episode 6 End of Watch Air Date: 2021-10-27 Duration: 60 min |
| Season 9 Episode 7 Trust Me Air Date: 2021-11-03 Duration: 60 min |
| Production | Brian Luce | Producer |
| Production | Anastasia Puglisi | Supervising Producer |
| Production | Matthew Newman | Co-Executive Producer |
| Production | Craig Cannold | Producer |
| Production | Gwen Sigan | Executive Producer |
| Production | Ike Smith | Co-Producer |
| Production | Chip Touhey | Unit Production Manager |
| Production | Craig Cannold | Unit Production Manager |
| Costume & Make-Up | Susan Kaufmann | Costume Design |
| Art | Gary Baugh | Art Direction |
| Sound | Jon Ailetcher | Production Sound Mixer |
| Costume & Make-Up | Jennifer Miller | Costume Supervisor |
| Sound | Jeffrey Kaplan | Sound Supervisor |
| Sound | Eddie Bydalek | Sound Re-Recording Mixer |
| Sound | Stacy Wallen-McCarthy | Music Supervisor |
| Sound | Chris Newlin | Music Editor |
| Production | Terry Blythe | Producer |
| Production | Scott Gold | Co-Executive Producer |
| Production | Gavin Harris | Co-Executive Producer |
| Production | Chad Saxton | Co-Executive Producer |
| Production | Laura A. Garcia | Associate Producer |
| Production | Daniele Bernstein | Co-Producer |
| Production | Rick Eid | Executive Producer |
| Production | Jenny Ravitz | Casting |
| Production | Arthur W. Forney | Executive Producer |
| Production | Jonathan Strauss | Co-Producer |
| Production | Dick Wolf | Executive Producer |
| Production | Michael Brandt | Executive Producer |
| Production | Peter Jankowski | Executive Producer |
| Production | Derek Haas | Executive Producer |
| Sound | Atli Örvarsson | Original Music Composer |
| Art | Gregory Van Horn | Production Design |
| Sound | Todd Morrissey | Sound Re-Recording Mixer |
| Production | Jonathan Strauss | Casting |
| Production | Claire Simon | Local Casting |
