When does Chicago Fire return?

The series was created by Derek Haas and Michael Brandt and the series is the first installment of the Chicago Fire franchise. The show explores the professional and personal lives of the firefighters, rescue personnel, and paramedics. It stars Jesse Spencer, Taylor Kinney, Monica Raymund, Lauren German, Charlie Barnett, David Eigenberg, Teri Reeves, Eamonn Walker, Joe Miñoso, Kara Killmer, Steven R. McQueen and Dora Madison Burge.