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 Erik Jensen Martin Watts Guest Star Samuel Hunt Greg Gerwitz Guest Star Steven R McQueen Jimmy Borelli Guest Star Monica Raymund Gabriela Dawson Guest Star David Eigenberg Christopher Herrmann Guest Star Barbara Eve Harris Emma Crowley Guest Star Stephen Conrad Moore Clayton 'Bug' Howard Guest Star Malcom Banks Gerard Garner Guest Star Jeff Garretson Manager Guest Star Jennifer Estlin Virginia Watts Guest Star Joe Anderson Head Mechanic 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