The earliest surviving film featuring Lon Chaney in a major role, By the Sun's Ray's was but one of several 2-reel westerns starring the florid Murdock MacQuarrie. MacQuarrie plays a detective investigating a series of gold shipment robberies. Along the way, he falls for a mine superintendent's pretty daughter (Agnes Vernon), much to the dismay of a sullen mine office clerk (Chaney), who is also smitten with the girl...

Mary Carlton, who lives with her invalid father on a cotton plantation, receives a letter from Bob, her brother, in New York, stating that he faces death in the electric chair for a crime of which he claims to be innocent. Determined to save him, she goes there, learns of his association with an underworld gang, and begins to suspect Handsome Joe of a connection with the crime.

A policeman doubles as a gunman to get in with the mob.

Bill Tracy is a Cattleman's Protective Association agent. Working undercover on his way to Sonora, a town dominated by rustlers, saves Betty Carter from a situation, but her rancher father, believing Blackie's suggestion that Bill is a rustler, forbids her to see him. Bill and his pal Heinie Schmaltz rescue each other from rustlers' various plots and ambushes and eventually discover that Blackie, Carter's foreman, is the leader of the rustlers.

A Secret Service agent nabs a scalpel-happy doctor who runs drugs in caskets.

A young woman goes undercover to gather evidence to free her boyfriend, an attorney who has been framed for a murder he didn't commit.

A successful shoe manufacturer named John Reeves goes on vacation and meets the grown children of his recently deceased and much-respected competitor; they're on the verge of losing the family legacy through their careless behavior. Reeves takes it upon himself to save his rival's company by teaching the heirs a lesson in business.

John Martin is a government agent working under cover. Leading citizen Morgan calls in gunman Galt who blows Martin's cover.

Tex Weaver travaille sous couvert pour attirer un gang de voleurs de banque. Quand il est tué, Tim Ross, un tireur d'élite de l'émission itinérante de Doc Shaw, prend le relais. Se faisant passer pour un Mexicain, il tend un piège au gang.

Al Kruger règne à la tête des gangs et sème la terreur dans la cité. Johnny Blake, un policier intègre, décide de réagir et s'introduit dans le cercle de Kruger...

Cowboy star Ken Maynard is Jim "Trigger" Morton, in town undercover while pursuing the man who framed him for robbery. But a well-placed shot tames a band of scofflaws and gains Morton the sheriff's badge. Now, he's riding on both sides of the law. The line is further blurred when old buddy Chuck offers evidence of Morton's innocence in exchange for a blind eye to Chuck's impending postal heist in this classic Western.

Monsieur Moto est chargé de démanteler un important syndicat du crime qui sévit en toute impunité à Londres. Pour cela, il se fait emprisonner afin d'approcher un détenu, Paul Brissac, membre de cette organisation. Une évasion « réussie » lui permet de connaître la bande de malfrats et de se faire intégrer dans leur équipe...

Hoppy goes undercover as a gambler from the East when Bar 20 cattle are stolen by unknown rustlers. Brennan/Talbot are twin brothers (one a casino owner, the other a rancher) and Hoppy believes they provide alibis for each other while one is out committing crimes. Hoppy gets a job in the casino to learn more but is exposed when a gambling gunslinger notices him.

A reporter goes undercover to break up an outlaw gang.

Parce qu'il se voit pendu en effigie a la porte d'un des magasins dont il est le proprietaire, le milliardaire M.J.P. Merrick decide de mener son enquete en se faisant embaucher comme vendeur au rayon chaussures.

Crime drama starring Richard Cromwell as a young medic who becomes the private physician to an underworld gang.

Duke Masters et ses deux amis, Pancho et Andy, sont des agents du gouvernement infiltrés pour le compte d'une compagnie minière dont les convois sont régulièrement dévalisés par les hors-la-loi. Pour entrer en contact avec le gang, ils attaquent eux mêmes un envoi d'or.

British Captain Terence Stevenson (Robert Donat) accepts an assignment even more dangerous than his everyday job of defusing unexploded bombs. Fluent in Romanian and German and having studied chemical engineering, he is parachuted into Romania to assume the identity of Captain Jan Tartu, a member of the fascist Iron Guard. He makes his way to Czechoslovakia to steal the formula of a new Nazi poison gas and sabotage the factory where it is being manufactured.

Johnny Mack Brown and Raymond Hatton return to the screen as saddle pals Nevada and Sandy in Monogram's Pals of the Border. In this one, our heroes are US marshals, hot on the trail of cattle rustlers.

Alicia, fille d'un espion nazi, mène une vie dépravée. Devlin lui propose de travailler pour les États-Unis afin de réhabiliter son nom. Elle épouse donc un ancien ami de son père afin de l'espionner. Devlin et elle s'aiment sans oser se l'avouer, attendant chacun que l'autre fasse le premier pas. Lorsque le rôle qu'elle tient est découvert, son mari décide de l'empoisonner.