Published in Detective Comics #10, December, 1937, 4 pages.
A tip comes in that warns provocateurs 'intend to harm the steamer Atlantis on its good-will voyage to Europe'. Bart Regan and Sally Norris are ordered to foil any such attempt. This involves becoming passengers for the trip. When no clues are to be found, Norris assumes the role of an anarchist to smoke out the real terrorist.