Labyrinth

Stephen Neale is released into WWII England after two years in an asylum, but it doesn't seem so sane outside either. On his way back to London to rejoin civilization, he stumbles across a murderous spy ring and doesn't quite know to whom to turn.

Czechoslovakia, March 1939, on the eve of World War II. As the German invaders occupy Prague, inventor Axel Bomasch manages to flee and reach England; but those who need to put his knowledge at the service of the Nazi war machine, in order to carry out their evil plans of destruction, will stop at nothing to capture him.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.

Blacklisted in modern day WW2, a Swedish oil trader opts to assist British Allies, by means of infiltrating and surveying Nazi Germany.