- Don Harvey - John Sieracki
- Larry Mitchell - Scott Kilpatrick
- Delaney Williams - Kevin Davis
- Lucas Van Engen - Leo Wise
- Jermaine Crawford - Jaquon Dixon
- Jermaine Crawford - Jaquan Dixon
- Domenick Lombardozzi - Stephen Leary
- Domenick Lombardozzi - Stephen Brady
- Tray Chaney - Gordon Hawk
- Anwan Glover - David Baker
- Bobby J. Brown - Thomas Allers
- Nathan Corbett - Tariq Touré
- Chris Clanton - Brian Hairston
- Seth Hurwitz - Donald Stepp
- Kevin Murray - Gary Proctor
- Ken Arnold - Charlie Gibson
- James Lewis - Judge Franklin Moore
- Shaun Woodland - Walter Collins
- Ian Duff - Ahmed Jackson
- Paige Carter - Stephanie Rawlings-Blake
- Dwayne Alistair Thomas - Kevin Haughton
- Marcellus ''Bassman'' Shepard - Gordon Johnson
- Dawn A. Douglas - Woman
- Lyon Beckwith - Booth
- Gabrielle Carteris - Andrea 'Andi' Smith
- Leah Pressman - Kristy Jenkins
- Thaddeus Street - James Otis
- Jeremy Gabriel - Pete Gallagher
- Mark McKinnon - Officer Miles
- Aristeo F. Kardi - Ryan Guinn
- Shalet Monique - Te'ana
- Kenneth Wayne - Det. Michael Sylvester
- J. Shawn Durham - Officer #2
- William L. Thomas - Customer
- Wadi Jones - Patrolman #4
- Joe Pistone - Det. Jason Giordano (uncredited)
- Treat Williams - Brian Grabler
- Benjamin Bass - James Kostoplis
- Joy Jones - Tisha Edwards
- Mike Sutton - Rod Rosenstein
- Brian Anthony Wilson - Andre Davis
- Michael J. Lyons - Jim Smith
- Steve Polites - Unit Leader
- Jermel Wilson - Car Smasher (uncredited)
- Ham Mukasa - Evodio Hendrix
- Robert Harley - Marcus Taylor
- Curt Morlaye - Antonio 'Brill' Shropshire
- Celeste Oliva - Marjorie German
- Susan Rome - Meghan Morrison
- Justin Fenton
- Kary Antholis
- Alexa L. Fogel
- Ed Burns
- William F. Zorzi
- Mara Goldman
- Nina K. Noble
- Kris Bowers
- Jay Peck
Treat Williams interpreta a Brian Grabler en la serie.
Jon Bernthal hace el papel de Sgt. Wayne Jenkins.
Wunmi Mosaku interpreta a Nicole Steele en la serie.
Jamie Hector interpreta a Sean M. Suiter en la serie.
Josh Charles interpreta a Daniel Hersl en la serie.
McKinley Belcher III interpreta a Momodu 'G Money' Gondo en la serie.
Rob Brown interpreta a Maurice Ward en la serie.
David Corenswet hace el papel de David McDougall.
Dagmara Dominczyk hace el papel de Erika Jensen.
Don Harvey interpreta a John Sieracki en la serie.
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