The longest-running cop show on American TV until "Law & Order"'s thirteenth season, "Hawaii Five-O" still has a long life in reruns and probably will continue in that vein long into the future.
Admittedly it did go downhill towards the end (the last season's episodes, ironically, seem even more dated than those from the '68 run) and no one can really claim that the acting was on a par with your Bochcos or your Levinsons, but it worked - yes, the scenery was a plus, along with Reza S. Badiyi's title sequence (still one of the all-time greats), but ultimately the glue that held it together was the late Jack Lord. He clearly thought the show revolved around him, and he was right - stiff, yes, but the man WAS Steve McGarrett; you never doubted for a second that he was in charge.
The show also had more than a few decent stories to go with the Hawaiian setting; that's the main reason this show was popular enough to run for more than 10 years (and more than twice that length in reruns). That and Morton Stevens's theme music, of course - all these years and that still hasn't worn thin yet either. I doubt "Miami Vice" will hold up so well.
The Stephen J. Cannell-backed pilot shot in '97 (and which brought back Chin Ho, killed off in "A Death In The Family") was judged so bad by CBS that to this day it hasn't aired, and probably never will. Like I'm weeping...
