sentences:  However, a year after that, in "Nine Dragons" (September 30, 1976), Wo Fat is depicted as the head of the Chinese mafia, 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.Wo Fat was then not seen for nearly four years.In his final appearance and the series finale ("Woe to Wo Fat" (April 5, 1980)), Wo Fat is presented as completely unaffiliated with the Chinese government, operating on a remote island, developing a solar weapon for the highest bidder.