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 Christian Stolte Randall McHolland Guest Star Kevin J. O'Connor Commander Fischer Guest Star Monica Raymund Gabriela Dawson Guest Star Peter Jacobson Mr. Friedman Guest Star Phil Burke Cooper Guest Star Brendan McCarthy Vince Parker Guest Star Charles Baker Terry Warfield Guest Star Stephen Louis Grush Rick Manning Guest Star Felix Solis Lieutenant Guthrie Guest Star Samuel Hunt Greg Gerwitz Guest Star Natasha Forouzannia Amber Banks Guest Star Zach Garcia Diego Dawson 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