FBI agent Ed Renard investigates the pre-War espionage activities of the German-American Bund.
A British man is hunted by British and German spies when he tries to sell blueprints.
Allied spies and Nazi Agents insinuate themselves at a Scottish cottage (converted to a wartime hospital) with interests on an inventor's nearly perfected bomb sight.
Broadway gamblers stumble across a plan by Nazi saboteurs to blow up an American battleship.
Humble stamp dealer Otto Becker has little to do with international politics, so when he receives a surprise visit from his estranged twin brother and Nazi spy, Baron Hugo von Detner, his world is thrown into turmoil. Threatening Becker with deportation, Hugo forces him to use his shop as a front for espionage.
A Nazi spy ring is after a chemical formula that increases the power of ordinary gasoline for U.S. Army aviation use. Two U.S. chemical companies are developing the formula, with each working on half for security purposes. The spies get half the formula and know that either of two chemists, Robert Norton or Tom Fielding, knows the rest. They capture Fielding, through a ruse by gang member Linda Pavlo, and threaten the life of his sister Nancy and his mother if he does not give them the formula. To protect his friend Fielding, who does know the formula and is engaged to Nancy, Tom pretends to know the secret and boards the Dawn Express plane with the spy leader and his gang.
Larry Haines, a mediocre vaudeville entertainer, boards a train for Los Angeles. Aboard, he meets an attractive, blonde British agent carrying a coded message hidden in a brooch—and is being pursued by Nazi agents.
The Lone Wolf tracks down Nazi spies in London during the German bombing.
FBI agents Carl Becker and John Trent raid a New York hotel, sending Nazi spies to an upstate hunting lodge.
An intrepid radio reporter sets out to track down and expose Nazi agents.
Lucky Jordan is a gangster living in New York City and when he's drafted into the army, he tries to escape duty by using an old con woman named Annie to convince the draft board he's needed at home. When that fails, Jordan is sent to boot camp, but he doesn't stay there long. He takes a beautiful USO worker hostage and flees back to New York. There, he learns that a rival gangster is plotting against America.
Balloon unit WAAFs catch German spies.
With the help of a WAAC group, Mr. District Attorny smashes a Nazi spy-ring that is selling counterfeit War Stamps and Bonds.
An Englishman kills a German look-alike and poses as a Nazi spy in London.
The Stooges are repairmen who get a job fixing the doorbell in large house which is the secret headquarters of some Nazi spies. They manage to ruin most of the house while working on the wiring and then subdue the spies and sink an enemy submarine by remote control.
An American ballistics expert in Turkey finds himself targeted by Nazi agents. Safe passage home by ship is arranged for him, but he soon discovers that his pursuers are also on board.
Ole discovers Nazi spies planning to take over the ship he's working on.
The British Army, retreating ahead of victorious Rommel, leaves a lone survivor on the Egyptian border who finds refuge at a remote desert hotel. He assumes the identity of a recently deceased waiter and is helped by the hotel's owner, despite protest from the French chambermaid, who fears the imminent arrival of Rommel and the Germans.
The Stooges join the war effort by enlisting at Merchant Marines. While aboard, they have a brief run-in with (a secret German Nazi officer) Lt. Dungen (Vernon Dent), and then mistake a torpedo for a beached whale. Moe says they have to kill it, and it promptly explodes. After being lost at sea for several days, they come across the SS Schicklgruber and climb aboard. Now with fully grown beards, they come across Lt. Dungen again, who does not recognize them. After realizing they are on a German war ship they eventually overtake the crew and toss them overboard.
A young, Scottish RAF gunner is debriefed by French officials about his escape from Nazi-occupied territory. They are particularly interested in one person who may or may not have been a German agent.