Jesse Spencer Matthew Casey Actor Taylor Kinney Kelly Severide Actor Monica Raymund Gabriela Dawson 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 Kara Killmer Sylvie Brett Actor Dora Madison Jessica "Chili" Chilton Actor Steven R McQueen Jimmy Borrelli Actor Nick Gehlfuss Will Halstead Guest Star Yaya DaCosta April Sexton Guest Star Colin Donnell Connor Rhodes Guest Star Brian Tee Ethan Choi Guest Star Patrick Flueger Adam Ruzek Guest Star Marina Squerciati Kim Burgess Guest Star Amy Morton Trudy Platt Guest Star Ralph Rodriguez Freddie Clemente Guest Star Anthony Ferraris Tony Guest Star Lorena Diaz Nurse Doris Guest Star Amanda Marcheschi Nurse Dina Guest Star Alex Weisman Chout 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 Reza Tabrizi Director Andrea Newman Writer