This season also introduced Al Harrington as part of the main cast as police officer Ben Kokua,[1] replacing the character of Kono (played by Zulu).
Wo Fat is arrested for espionage and murder by McGarrett, who in a last second twist ending receives a shocking secret from Jonathan Kaye (Joseph Sirola).
An Army officer devises a bizarre scheme to kidnap a top government scientist and collect a ransom of one million dollars in diamonds.
With his grandson dead and his son in prison, Dominic (Luther Adler) sets in motion a scheme to frame McGarrett for the murder of a just-released drug pusher.
An obscure shopkeeper (Nehemiah Persoff) becomes the catalyst in a plot to assassinate a high-level Iron Curtain defector (Mark Lenard).