For 11 of the 12 years that “Hawaii Five-O” first ran on CBS, Mr. MacArthur, as Detective Danny Williams chased thieves, hit men, swindlers, spies and assorted loonies. His boss was Detective Steve McGarrett, played by Jack Lord, the straitlaced, tight-lipped head of a small, elite police team determined to keep the idyllic islands from turning into a modern Wild West.
