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.
Losing his memories of the last few days, neurologist Dr. Steele is told that his wife has been brutally murdered. Steele, aware of his conniving wife's infidelity, believes he may have been the killer and enlists the aid of his pretty nurse Stella to hypnotize him into recovering his lost memories.
On the eve of World War II, the German Kurt Müller, his American-born wife Sara, and their three children, having lived in Europe for years, visit Sara's wealthy mother near Washington, DC. Kurt secretly works for the anti-Nazi resistance. A visiting Romanian count, becoming aware of this, seeks to blackmail him.
A US Navy submarine, the USS Corsair, is operating in the North Atlantic, hunting German merchant raiders that are preying on Allied shipping. Its new executive officer, Lt. Ward Stewart, has been transferred back into submarines after commanding his own PT boat. At the submarine base in New London, Connecticut, he asks his new captain, Lt. Cmdr. Dewey Connors, for a weekend leave to settle his affairs before taking up his new assignment. On a train bound for Washington D.C., Stewart accidentally encounters New London school teacher Jean Hewlett and her students. Despite her initial resistance to his efforts, he charms her and they fall in love.
During the Nazi occupation of Czechoslovakia, surgeon Dr. Franticek Svoboda, a Czech patriot, assassinates the brutal "Hangman of Europe", Reichsprotektor Reinhard Heydrich, and is wounded in the process. In his attempt to escape, he is helped by history professor Stephen Novotny and his daughter Mascha.
In sleepy Santa Rosa, restless young Charlie’s world brightens when her sophisticated Uncle Charlie arrives for a long visit. But as his behavior grows increasingly strange, she begins to suspect that her beloved uncle may be hiding a terrible secret—and that danger has quietly entered her home.
After Pearl Harbor, convicts at Alcatraz prison live in fear of bomb attacks, driving Champ Larkin and his pal Jimbo to a desperate escape attempt which lands them on a tiny lighthouse island, where they take over. The five inhabitants are stymied in their efforts to summon aid. But the island also figures in the schemes of a big Nazi spy ring; which will win out, the gangsters' greed or their patriotism?
Rick Leland makes no secret of the fact he has no loyalty to his home country after he is court-martialed out of the army and boards a Japanese ship for the Orient in late 1941. But has Leland really been booted out, or is there some other motive for his getting close to fellow passenger Doctor Lorenz? Any motive for getting close to attractive traveler Alberta Marlow would however seem pretty obvious.
Sadistic killer-for-hire Philip Raven becomes enraged when his latest job is paid off in marked bills. Vowing to track down his double-crossing boss, nightclub executive Gates, Raven sits beside Gates' lovely new employee, Ellen, on a train out of town. Although Ellen is engaged to marry the police lieutenant who's hunting down Raven, she decides to try and set the misguided hit man straight as he hides from the cops and plots his revenge.