Guest Stars Troy Evans as Detective "Barrel" Johnson Gregory Scott Cummins as Detective Robert "Crate" Moore DaJuan Johnson as Rondell Pierce Scott Klace as Sergeant John "Mank" Mankiewicz Paul Calderon as Detective Santiago "Jimmy" Robertson Daya Vaidya as Jen Kowski Ingrid Rogers as LaTonya Edgar Yancey Arias as Mayor Hector Ramos John Getz as Bradley Walker Winter Ave Zoli as Sgt. Amy Snyder John Marshall Jones as Special Agent Jay Griffin Tamberla Perry as IA Detective Gabriella Lincoln Jamie McShane as Francis "Frankie" Sheehan Barry Shabaka Henley as Terry Drake Louis Ozawa Changchien as Chuck Deng David Hoflin as Detective Doug Rooker Erich Anderson as Phil Gentry Jerry MacKinnon as Alex Kaplan Deidrie Henry as Millie Elias Anne Dudek as Pamela Duncan William Russ as Captain Garwood Nanrisa Lee as Tiffany Hsu David Barrera as Detective Stan Pipes Quincy Fouse as Martin Elias Clark Johnson as Howard Elias Michael Dunn as Aaron Fagen Co Starring Joni Bovill as Ida Monti Sharp as Clifton Campbell / Man on Bike / KTK Barry Livingston as Gary Potter Jason Rogel as Det. Jeremy Fix Christine Weatherup as PIO Shayda Miller Chen Tang as Ken Lin Andrew Chen as Tian Jun Gu Misty Monroe as Missy Edwards Steven Lee Allen as Central Det. Bob Flynn Eric Christie as Buck Scott Alan Smith as Jacob Lamb