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 John Bedford Lloyd Don Enrietto Guest Star Kevin Quinn Nate Hansen Guest Star Brian McCaskill Dale Hansen Guest Star Scott Benjaminson Johnny Douglas Guest Star Casey Tutton Collette Guest Star Dale Pavinski Brent Norelli Guest Star Adam Tanguay Patrolman 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