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 Sophia Bush Erin Lindsay Guest Star Brittany Curran Katie Nolan Guest Star Michelle Forbes Gail McLeod Guest Star Mena Suvari Isabella Guest Star Jon Seda Antonio Dawson Guest Star Randy Flagler Capp Guest Star John Babbo Griffin Darden Guest Star Derek Haas Executive Producer, Writer Michael Brandt Executive Producer, Writer Jeffrey Nachmanoff Executive Producer Dick Wolf Executive Producer Peter Jankowski Executive Producer Danielle Gelber Executive Producer Joe Chappelle Director Jann Turner Director Michael Slovis Director Sanford Bookstaver Director Jean de Segonzac Director Steve Shill Director Andrea Newman Writer Michael Gilvary Writer Matt Olmstead Writer Hilly Hicks Jr. Writer Ryan Harris Writer Tim Talbott Writer