Jason Beghe Sergeant Hank Voight Actor Sophia Bush Detective Erin Lindsay Actor Patrick Flueger Officer Kyle Ruzek Actor LaRoyce Hawkins Officer Kevin Atwater Actor Elias Koteas Detective Alvin Olinsky Actor Jon Seda Detective Antonio Dawson Actor Jesse Lee Soffer Detective Jay Halstead Actor Marina Squerciati Officer Kim Burgess Actor Amy Morton Desk Sgt. Trudy Platt Actor Brian Geraghty Officer Sean Roman Actor Markie Post Barbara 'Bunny' Fletcher Guest Star Stella Maeve Nadia Decotis Guest Star Robert Wisdom Ron Perry Guest Star Ian Bohen Edwin Stillwell Guest Star Kara Killmer Sylvie Brett Guest Star Dora Madison Alissa Martin Guest Star Hans Fleischmann Chris Campbell Guest Star Chris Agos ASA Steve Kot Guest Star Jason Singer Oskar Bembenek Guest Star Daniel Cantor Lawyer Guest Star Chris Routhe I.A. Officer Guest Star Dick Wolf Executive Producer Matt Olmstead Executive Producer Michael Brandt Executive Producer Derek Haas Executive Producer Peter Jankowski Executive Producer Danielle Gelber Executive Producer Joe Chappelle Executive Producer