A CALL TO A BOARDING SCHOOL LEAVES SEVERIDE QUESTIONING HIMSELF AND DAWSON'S TRAINING IS PUT TO THE TEST IN THE SEASON FINALE --
- A fire at a boarding school leaves Lt. Severide (Taylor Kinney) shaken and wondering if he could have done more.
- Meanwhile, with the firehouse in full support of Dawson (Monica Raymund) as she retakes the fireman's exam, Lt. Casey (Jesse Spencer) attempts some political maneuverings on her behalf.
- Elsewhere, Mills (Charlie Barnett) looks for answers about his father's mysterious past and Chief Boden's (Eamonn Walker) grand plans take a detour.
Lauren German, David Eigenberg, Yuri Sardarov, Joe Minoso and Christian Stolte also star. Sophia Bush, Amy Morton, Randy Flagler, Melissa Ponzio, Vedette Lim, Edwin Hodge and Kenny Johnson guest star.