A graphic adventure from Thriller Picture Library #400, March 1962 - 64 pages.
David Doughty is in Lisbon where the neutrality of its country make it an excellent safe harbor for spies from many nations. Spy 13 has just fooled the Germans enough to buy fake intel and is flying back to London when the plane is brought down over water by a German fighter. One of his fellow survivors makes Spy 13 very curious but keeping track of the man will prove challenging and dangerous.