Dashing Coast Guard Lieutenant Terry Kent (Ralph Byrd) is determined to stop the villainous Boroff (Bela Lugosi), who has invented a disintegrating gas that's capable of world destruction. Follow Kent through 12 exciting chapters of cliffhanging suspense as he pursues Boroff in a desperate race against time. Republic Pictures loaded <i>SOS Coast Guard</i> with action and exceptional special effects to create one of the best serials of all time.