Russia invades Finland and Black X comes to the rescue of the son of the U.S. Commissioner of Finnish Aid who has been kidnapped by the Russians.; Hazzard adds yet another weapon to his arsenal embodied within Bozo: the Super-Sepericonoscope, which can receive audio and video from far distances......a weapon responsibile for helping Hugh deal with the Darmanian spy ring.; Kent and Professor Clark make their way to the Sargasso Sea on a scientific expedition to go down in a diving bell nearly a mile to see what the area looks like. On the way, the ship's captain and crew take over the voyage and make the dive themselves, recovering an old iron chest full of jewels and money that Sanchez and his partner has stolen years before. The Invisible Hood takes over and conquerors the entire crew.; When a rival reporter reveals a key witness's name, Chic has to protect her from murder.