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Boden tries one last time to keep the firehouse from being closed while a romance begins between Casey and Dawson on Chicago Fire.
Casey isn't happy to see his parental duties end while Cruz and his brother deal with the aftermath a a shooting in their neighborhood on Chicago Fire.
When a tanker and a commuter train collide, the fireshouse squad is called to the scene on Chicago Fire.
While on a run Severide stumbles upon a child trapped in a construction site while McLeod and Boden argue over the future of the firehouse on Chicago Fire.
McLeod pushes for Boden's early retirement and goes as far as finding a possible replacement and the mole's identity finally comes to light on Chicago Fire.
Severide pushes to have the serial arsonist charge while Clarke is under suspicion for being a mole inside the firehouse on Chicago Fire.
Severide must find proof to confirm his theory on the arsonist's identity while Casey must get used to a whole new lifestyle on Chicago Fire.
Severide tries to anticipate the next attack from the serial arsonist while Casey attempts to deal with the after effects of Heather's accident on Chicago Fire.
Chicago Fire starts its second season with Severide being targeted by an arsonist and Firehouse 51 faces the possibility of being closed for good.
On the season finale of Chicago Fire, the squad is faced with an unexpected and unstable situation at the Cook County Jail.