Stories from the set

Anthony Ferraris still works as a firefighter. It is thanks to his involvement and help that all the fire episodes look so realistic.

In many rescue services (and the Chicago Fire Department is no exception), employees are not allowed to grow facial hair, as it can interfere with the airtight seal of a breathing mask. A mustache is not considered a hindrance.

The series was filmed in Chicago. Firehouse 51 is actually number 18. "Molly's Bar," which some characters co-own, is Lottie's Bar in the Bucktown neighborhood.

The scenes in the dining room were filmed both at the firehouse and at the studio. If a door is visible to the left of the stove, it was filmed at the studio. If there is a drinking fountain there instead, filming took place at Firehouse 18.