Hawaii Five-O - Season 12 - Eps 20: Woe To Wo Fat
The series concludes with the final showdown between McGarrett and Wo Fat. Three scientists have gone missing. They have one thing in common: they all attended a symposium that discussed a possible space-based, laser defense system. McGarrett impersonates a fourth scientist, Dr. Elton Raintree, who attended the same gathering and is soon abducted. Wo Fat is behind it all and wants the scientists to complete their work and produce such a device.
About Hawaii Five-O

Title: Hawaii Five-O
First Air Date: 1968-09-20
Last Air Date: 1980-04-05
Status: Ended
Rating: 7.125/10 (from 144 votes)
Language: EN
Seasons: 13
Total Episodes: 284
Network: CBS
Genres: Action & Adventure, Drama
Production Companies: Leonard Freeman Production, CBS Studios
Synopsis
Hawaii Five-O is an American police procedural drama series produced by CBS Productions and Leonard Freeman. Set in Hawaii, the show originally aired for 12 seasons from 1968 to 1980, and continues in reruns. Jack Lord portrayed Detective Lieutenant Steve McGarrett, the head of a special state police task force which was based on an actual unit that existed under martial law in the 1940s. The theme music composed by Morton Stevens became especially popular. Many episodes would end with McGarrett instructing his subordinate to "Book 'em, Danno!", sometimes specifying a charge such as "murder one".
Cast

Jack Lord
Det. Steve McGarrett

Herman Wedemeyer
Duke

William Smith
Det. James 'Kimo' Carew

Richard Denning
Governor

Sharon Farrell
Lori Wilson