A shot of the interior of the fire department and the rescue squad departing at the beginning was reused from the TV series "Emergency", as you can see the "Rescue Squad 51" markings on the fire truck in that shot.
During this episode in which Hunter is tracking an arsonist, Hunter's Captain playfully refers to Rick Hunter as Batman and for him to go protect Gotham.
In D.C. comics one of the members of Batman's rouges gallery going by the name Firefly is an arsonist.