Chicago Fire 4×09 “Short and Fat” – Members of Firehouse 51 are less than thrilled when Captain Patterson (guest star Brian White) steps in as replacement for Chief Boden (Eamonn Walker) while he deals with clearing his good name. When Severide (Taylor Kinney) learns of the potential whereabouts of Serena (guest star Ilfenesh Hadera), Chicago P.D’s Officer Atwater (LaRoyce Hawkins) and Officer Ruzek (Patrick John Flueger) head to Lake Carlyle to try and uncover additional clues on Boden’s case. Meanwhile, Herrmann (David Eigenberg) and Otis (Yuri Sardarov) give Freddie (guest star Ralph Rodriguez) a job that keeps him close by and Jimmy (Steven R. McQueen) and Chili (Dora Madison) elicit more attention then either bargained for, causing some friction between them. Jesse Spencer, Monica Raymund, Kara Killmer, Joe Minoso and Christian Stolte also star. John Seda, Rachel Nichols, Melissa Ponzio, Mark Hengst and Fredric Lehne also guest star.