A veteran US Secret Service agent must thwart the covert conspiracy of an enemy spy network that threatens the world's safety.
An airplane crashes in Spain. The Russian as well as the Chinese government take care of the events because on board there was a "black box" containing precious and dangerous devices for the whole world.
A corrupt cop steals evidence of a Mafia drug ring with plans to sell it to their rivals, but is hunted by the mafia and government agents.
In Barcelona, secret agent Antoine Donadieu thwarts the plans of a Nazi scientist.
When $300,000,000 in diamonds are stolen from a fiery plane wreck the British Government become concerned that it might be part of a plot to undermine the value of sterling. They hire professional photographer, amateur lady-killer, and undercover agent Steve Norton to investigate.
Yankee soldiers-of-fortune smash a spy plot aimed at seizing Hong Kong.
Foreign powers keep getting their hands on U.S. military secrets, so the head of the American diplomatic corps calls in his nephew Dick Stansbury to help. Stansbury knows that Doctor Montell is at the bottom of this, so he poses as an inventor of an innovative aerial gun. This sparks the doctor's interest, and when they both attend a weekend party at the Ryerson estate, Montell tries to get Stansbury to sell the gun to his country.
Free-lance undercover agent Coplan receives a phone call from an old girlfriend in Turkey. The panic-stricken woman gives sketchy details of a plot that threatens world security. When Coplan arrives, he is told the woman has been killed, and the trail of the murderer leads to her mad-scientist brother.
A lady killer tracked by the police, takes refuge at a psychiatrist's home, and the doctor tells him three stories, to convince him that crime does not pay
G-Men in Washington break up a powerful spy ring and capture the ringleaders.
Exiled French patriot helps to find the men who want to betray emperor Napoleon III by selling military secrets to the German government.
Secret Agent Bart Fargo chases the kidnappers of the inventor of a death ray.
Reporter Michael Gordon uncovers intrigue in Damascus, where the Allies and Nazis struggle for control of Arab sympathies.
A master criminal is pursued by inspector Milton
Some dastardly criminals have stolen some top secret plans and tattoo them on the back of a woman so she can sell them to the highest bidder in Lisbon. This woman plans to take the place of a 'Sidney Royce', a legitimate traveler going to Lisbon as a reporter. Crossed signals allows the real Sidney to reach Portugal first, where she is pursued by those trying to obtain the plans and US government agents trying to prevent the sale.
Undercover agent, using his bar as a front, battles three killers to find a stolen fortune.
The hero steals the haul from the thieves, gives it back to the police but charges 10% for his services.
Nakano Institution is the so-called ‘Spy School’ where many young men are trained to be excellent spies. They erase their names, families, even lovers to bury themselves in training. Jiro, one of the cadets, successfully seize the secret code of English army to pass the final exam. However, he reaches the crossroad when his fiancee Yukiko turns out to be a spy of the enemy.
A network of spies affects the lives of people in and out of the organization in this espionage drama. Dominique is the neglected wife of a spy who tracks him down at a Paris antique shop. Finding him with a female spy, the enraged wife shoots both of them. Dominique hides out on a boat while the police investigate the murders, and international spies scramble to recover some missing microfilm. Helen is the spy boss who orders a hit man to go after Dominique.
A man escapes from a Russian prison and then from a United States embassy, taking with him some very important top secret information from both sides.