Steel uncovers a secret Nazi air base in the jungle of Brazil.; Lucky Lavitto has been going to a favorite fortune teller for years, always hearing that he is still boss of the town. However, on his most recent visit to the seer, he is told that he is to fear "The Black Jack", which will bring about his doom!; A fleet of German transports is landing a division on Greenland, unknown to Captain Valor and his Marines on their side of the island.; Wilbur is giving McGeery a dunking in the watering trough for calling him "Wilbur" instead of "Bill".; Slade holds the mortgage on Wilson's ranch and is pretty anxious to take over at any cost.; A German U-boat has a secret hiding place in a castle by the Scottish coast.