James “Brick” Davis, a struggling attorney, owes his education to a mobster, but always has refused to get involved with the underworld. When a friend of his is gunned down by a notorious criminal, Brick decides to abandon the exercise of the law and join the Department of Justice to capture the murderer.
FBI agent Mac Richards takes his girlfriend, Helen Phillips, to a world championship boxing match only to learn that the event has been canceled because the titleholder has been kidnapped. Mac is entrusted with the ransom money, but the kidnappers discover that his fellow agents have surrounded the train station locker where the money was to be dropped and order the champ's manager to have the money delivered by an usher to a different location. With Helen disguised as the usher and Mac driving a cab, the pair set off to deliver the money. The gang isn't taking any chances, though - they waylay the cab and take both the ransom money and Helen to their hideout. Now Mac and his fellow agents must rescue both the champ and his sweetheart before they come to harm.
Jim 'Socker' Conway, former boxer and FBI hero, is maneuvered for political reasons into a do-nothing job in the district attorney's office. Meanwhile, he meets wild debutante Letty Lane, girlfriend of mob mouthpiece Steve Lawrence; and Letty's much nicer sister Susan. Now the slot machine gang brutally beats Jim's friends Franz and Otto. And Jim finds a way to use his nominal position to go into the racket- busting business. But his success puts Letty in deadly peril...
During a stick-up, a woman is excited by the criminal and joins him on his crime spree.
FBI agent Ed Renard investigates the pre-War espionage activities of the German-American Bund.
Dr. Bartley Morgan covers up his profitable illegalities with the respectable veneer of a posh, highly profitable private practice, he runs with his nurse Margaret Hopkins. The FBI agent Robert Anders has to catch on to Morgan's illicit activities.
Before he was killed, Martin hid a half million dollars worth of bonds on his ranch. Brainard, who killed him, Inspector Carson posing as Sam Brown, and Martin's niece Margaret all want the ranch, and it's being sold at auction.
G-Man Bill Collins swings into action when a crooked sweepstakes racket begins insinuating itself upon the honest citizenry of the US. The crooks have flooded the market with counterfeit lottery tickets, reducing many an unwary speculator to poverty.
This expose of the U.S. parole system, as seen through the eyes of FBI Director J. Edgar Hoover, takes dead aim on lawyers who manipulate the justice system in order to get undeserving convicts parole from prisons. The point is made when FBI agents are assigned to track down "Big Boy" Bradmore, who after getting an undeserved parole, via the efforts of a shyster lawyer, promptly murders an FBI agent.
Ma Webster (Blanche Yurka) and her boys rob a bank on Christmas Eve; G-men stop them with Tommy guns.
A gang of urban street kids and a club of suburban would-be federal agents, at first rivals, join forces to rescue the father of one of the kids, the inventor of a super-explosive and its remote detonator, from the clutches of a band of foreign subversives call the "Flaming Torch Gang". A 12-episode movie serial with the chapters: •1. Enemies Within •2. The Blast of Doom •3. Human Dynamite •4. Blazing Danger •5. Trapped By Traitors •6. Traitors' Treachery •7. Flaming Death •8. Hurled Through Space •9. The Plunge of Peril •10.The Toll of Treason •11.Descending Doom •12.The Power of Patriotism
FBI agents Allan Harper and Tommy Baker are in charge of a group of subversives, spies and saboteurs that the US government is deporting to foreign countries aboard a ship. The deportees attempt to take over the ship.
FBI agent Bob Grayson works in collaboration with Max, a British agent posing as a fugitive German aviator. Meanwhile, fearless girl reporter Dallas Dayle is assigned by her editor to track down the enemy aviator and get an exclusive story. When she catches up with Grayson and Max, Dallas is under the impression that Grayson is a rival reporter and Max is the genuine fugitive.
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.
A group of street kids battle a terrorist gang led by a Japanese spy.
Two FBI agents are sent to investigate sabotage at a lumber camp.
The centrepiece of this March of Time film is the dramatised sequence showing the FBI infiltration of a group of American Nazis, whose espionage and sabotage operations are run from the backroom of a local restaurant. The film’s message - that the FBI is more than a match for German spies - is reinforced by the focus on new techniques such as covert filming and forensic evidence analysis, helped by an army of administrative staff working alongside the Bureau’s 4,500 special agents.
The US Government tries to track down embedded Nazi agents in the States.
In order to help bring Nazis to justice, U.S. government agent T.R. Devlin recruits Alicia Huberman, the American daughter of a convicted German war criminal, as a spy. As they begin to fall for one another, Alicia is instructed to win the affections of Alexander Sebastian, a Nazi hiding out in Brazil. When Sebastian becomes serious about his relationship with Alicia, the stakes get higher, and Devlin must watch her slip further undercover.
A security leak is found at a Southern California atomic plant. The authorities stand in fear that the information leaked would go to a hostile nation. To investigate the case more efficiently, Dan O'Hara, an FBI agent, and Philip Grayson, a Scotland Yard sleuth, join forces. Will they manage to stop the spy ring from achieving their aim?