Jesse Spencer Matthew Casey Actor Taylor Kinney Kelly Severide Actor Charlie Barnett Peter Mills Actor Monica Raymund Gabriela Dawson Actor Lauren German Leslie Shay Actor Eamonn Walker Chief Wallace Boden Actor David Eigenberg Christopher Herrmann Actor Joe Minoso Joe Cruz Actor Yuri Sardarov Brian "Otis" Zvonecek Actor Christian Stolte Randy "Mouch" McHolland Actor Treat Williams Benny Severide Guest Star Jesse Lee Soffer Jay Halstead Guest Star Jeff Hephner Jeff Clarke Guest Star Mike Starr Arthur Guest Star Chaon Cross Heather Darden Guest Star John Hoogenakker Lt. Spellman Guest Star Michelle Forbes Gail McLeod Guest Star Mena Suvari Isabella Guest Star Charlie Babbo Ben Darden Guest Star John Babbo Griffin Darden Guest Star Maura Kidwell Amy Guest Star Kiley Moore Pam Guest Star Derek Haas Executive Producer Michael Brandt Executive Producer Jeffrey Nachmanoff Executive Producer Dick Wolf Executive Producer Peter Jankowski Executive Producer Danielle Gelber Executive Producer Jann Turner Director Andi Bushell Writer