Guest Stars Robert F. Chew as Joseph "Proposition Joe" Stewart Isiah Whitlock Jr. as State Sen. R. Clayton "Clay" Davis Michael Salconi as Det. Michael Santangelo Maria Broom as City Councilwoman Marla Daniels Melanie Nicholls-King as Cheryl Richard Burton as Sean "Shamrock" McGinty Brian Anthony Wilson as Det. Vernon Holley Leo Fitzpatrick as Johnny Doug Olear as FBI Special Agent Terrence "Fitz" Fitzhugh Charley Scalies as Thomas "Horseface" Pakusa Jeffrey Pratt Gordon as John "Johnny Fifty" Spamanto Luray Cooper as Nathaniel "Nat" Coxson Chris Ashworth as Sergei "Serge" Malatov Bill Raymond as The Greek Benay Berger as FBI Supervisor Amanda Reese Michael Potts as Brother Mouzone Robert Colesberry as Det. Ray Cole Jeffrey Fugitt as Claude Diggins Kristin Proctor as Aimee Lev Gorn as Eton Ben-Eleazer Lance Irwin as Maui S. Robert Morgan as Butchie Robert Hogan as Louis Sobotka Bus Howard as Ott Tommy Hahn as FBI Special Agent Salmond Doug Lory as Little Big Roy William Gerad Jones as Worker in Truck Terminal Zo Kim as Civilian Co Starring Domenick Lombardozzi as Det. Thomas "Herc" Hauk Seth Gilliam as Det. Ellis Carver Jim True-Frost as Det. Roland "Prez" Pryzbylewski Delaney Williams as Sgt. Jay Landsman Michael K. Williams as Omar Little Tray Chaney as Malik 'Poot' Carr Pablo Schreiber as Nickolas "Nick" Sobotka James Ransone as Chester "Ziggy" Sobotka