I have been watching this show since I was 8 years old. I remember watching its final episode in 1980(when I was 14 years old). And its still on in syndication some 20 years later after it went off the air. For the astounding 13 seasons that it ran on CBS-TV(from 1968-1980),and again as a very short lived series called "McGarrett"(when Jack Lord's character leaves 5-O to become a private investigator),its no wonder why in point the shows still leaves viewers on the edge of their seats,and at the end its McGarrett telling his partner after he catches the bad guy or super villain to "book'em,Danno...murder one". This show set the standards today for all cop shows that were to follow it,and it still holds up. Kudos to the legendary Jack Lord(who died two years ago on his resort in Hawaii),and series creator Leonard Freeman who were the first to put Asian-Americans and other minorities in non-stereotypical roles(which followed the same format that producer Sheldon Leonard used when he put Bill Cosby as the first African-American in a starring role in "I Spy" four years earlier in 65). One of classic TV cop shows of the late 1960's and throughout the remainder of the 1970's,and it shows. Catch the reruns.