James MacArthur, who played Detective Danno Williams on the original TV hit Hawaii 5-0, has died aged 72, according to the Hollywood Reporter Thursday.
MacArthur's catchphrase "Book-em Danno" is considered one of the most popular lines in US television history. According to his agent, Richard Lewis, he died of "natural causes" in Florida, dpa reported.
Apart from his landmark role in Hawaii Five-O, MacArthur starred in films such as Battle of the Bulge and Swiss Family Robinson.