The NBC TV show , Chicago Fire , revolves around imaginary firefighters who are designated as Battalion Chief 25 .
The NBC television show Chicago Fire , which centers on a group of fictional firefighters and paramedics at a firehouse that is the headquarters of the fictitious Engine Company 51 , Truck Company 81 , Rescue Squad Company 3 , Battalion Chief 25 and Ambulance 61 . ( represented by the headquarters for real Engine Company 18 ) .
Chicago Fire Department