Wo Fat is the name of a fictional villain in the long-running CBS series Hawaii Five-O. On the show, Wo Fat is the arch-nemesis of Steve McGarrett, the head of Hawaii's (fictional) state police force. Wo Fat is a top Chinese intelligence agent in the Pacific, whose duties include running Chinese spy missions in Hawaii (Seasons 1-5). In Season 7 he is working for a hawkish government faction in China, and attempts to assassinate a Chinese government foreign minister, who represents the more peace-oriented leadership in China at the time and is a staunch communist. At the Season 8, Wo Fat returns to his more traditional role as an intelligence operative attempting to obtain the coordinates for a downed American military satellite in the Pacific through a mole in U.S. Naval Intelligence.
In the Season 9, Wo Fat is depicted as the head of the Chinese mafia (The Nine Dragons), who is attempting to cause a conflict between the U.S. and China through a mass killing in China from American developed nerve gas, stolen from Hawaii, which would allow him to regain power in the Chinese government.
In Season 12, Wo Fat is presented as completely unaffiliated with the Chinese government, operating on a remote island, developing a solar weapon for the highest bidder.
In the last episode, Wo Fat is finally arrested and jailed. However, in the final shot, he smiles and craftily produces a file hidden in his shoe. It remains a perpetual cliffhanger. In the original series, he was portrayed by actor Khigh Dheigh (who, despite looking sufficiently Asian for the role, was actually of mixed Anglo, Egyptian, and Sudanese ancestry).