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 Samuel Hunt Greg Gerwitz Guest Star Kevin J. O'Connor Commander Fischer Guest Star Taylor John Smith Nick Sutter Guest Star Robert Belushi Landon Vanick Guest Star Jimmy Callahan Ray Kozelek Guest Star Ryan Kitley Don Hastings Guest Star Brenda Barrie Carolyn 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