This is the one that began a series that lasted 12 years! Probably one of the best cop shows of all time! McGarett is a tough as nails cop on an elite state police force answerable only to the governor. He is stumped when one of his best friends turns up dead. As is turns out a Red Chinese agent named Wo Fat is using a device to procure information from U.S. agents. Wo Fat became one of McGarett's arch enemies throughout the run of the series. It should be noted that Danny Williams was played by an unknown actor named Tim O'Kelly. He was replaced in the series by James McArthur. The other regulars who went on to star in the series are Zulu and Kam Fong.