A cagey professor and the syndicate team up on a deadly caper. About $750,000 in traveler checks are stolen in Denver. A planeload of criminals posing as academics board a charter flight to Honolulu, with each given $7,500 in traveler checks to spend. A hit man ensures a woman employee of the Honolulu office of the traveler check company can't get the serial numbers of the hot checks circulated. McGarrett calls the caper a "jigsaw puzzle." The question is whether he can solve it in time.
—Bill Koenig