"King of the Sewers"
Major Thorpe (writer and artist), Mort Leav (pencils and inks)
Published in Jumbo Comics #58, Dec 1943 - 8 pages
Flying a planeload of dynamite into France for the Resistance, ZX-5 is met by German soldiers instead. Help arrives and the ZX-5 and his shipment head to Paris and the man known as the King and the plan to blow up key Nazi buildings from beneath them.