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 Monica Raymund Gabriela Dawson Guest Star Robert Knepper Adrian Gish Guest Star Eamonn Walker Wallace Boden Guest Star Charlie Barnett Peter Mills Guest Star Markie Post Barbara 'Bunny' Fletcher Guest Star Ellen Woglom Megan Shay Guest Star Ricardo Gutierrez Bob Kirchen Guest Star Charles Stransky Marco Guest Star Terry Bozeman Dr. Miller Guest Star Lance Baker Rupert Yackey 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