Chicago Fire, which premiered in 2012, follows the firefighters of Firehouse 51, a group of people who are more like family ...

Finally, in the season 12 finale, Chicago Fire bid farewell to original cast member Eamonn Walker, marking the end of his 12 seasons as a series regular in the role of Chief Wallace Boden.

NBC has been a popular network over the years with its procedural drama streak in different segments, and Chicago Fire is one of its many iconic creations.