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 Samuel Hunt Greg Gerwitz Guest Star Ethan Choi Guest Star David Alan Basche Jim Sheltie Guest Star Ray Abruzzo Frank Guest Star Louis Cancelmi Charlie Koslo Guest Star Michael Nouri Carlo Tafani Guest Star Cory Scott Allen Ritchie Gibson Guest Star Keith D. Gallagher Denny Gibson Guest Star Kathy Scambiatterra Medical Examiner Ruth Dwyer Guest Star Corinne Natyshak Lauren Wasson 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