Most memorable episode to you?
I loved this show and recall many great episodes.
One that always comes to mind is "The Queen of Peru" the one when the Indiana family stole Jimmy's grill.
"Gearjammers" was a good one and had my favorite car chase, which featured Jimmy's patented, kick-@$$, floor-it-in-reverse-spin-around-throw-it-in-drive-and-seemlessly-peel-out-and-drive-away maneuver.
"The Attractive Nuisance" featuring Victor Jury as the dogfood-eating, old-time detective obsessed with tracking down a gangster named Capobianco. "You sit up here and eat dog food..."
Of course the Lance White episodes are hilarious.
Here's a trip down Memory Lane: some Rockford Files locations.
http://rockfordfilesfilminglocations.blogspot.com/2012_12_09_archive.html