An honest boxer refuses to throw a fight for a gambler. They get into a fight and the boxer knocks the gambler out. Thinking he's killed him and believing that the police are after him, the horrified boxer runs off and takes to the road, promising never to box again. However, one day he comes upon a small but scrappy young kid who has the potential to be a champion. The former boxer takes the kid under his wing and trains him, but the kid's ensuing success starts to go to his head. Pretty soon he finds himself mixed up with gamblers, too.

Doan is trying to get control of the valley by having his night riders drive the ranchers out. Jack Benson hires on at the Williams ranch, the one ranch Doan must have. When Benson learns that Doan is the boss of the night riders, he joins up with him. He has a plan that both saves Williams' ranch and also brings Doan to justice.

A cowboy realizes too late that his girlfriend's father had been cheated out of everything in a crooked card game. He sets out to get revenge on the crooks.

Tim Hart (Tim McCoy), a former Texas Ranger, comes out of retirement to avenge the death of Lightnin' Ed (Frank LaRue), his foster father, who had been sent to Rainbow's End, to investigate a series of train robberies. He senses that George Johnson (Walter McGrail) and his henchman, Speck (Bob Kortman), head the robbery gang, especially after Speck makes an ambush attempt on his life.

A rancher finds that his stock of horses is mysteriously being depleted, and discovers that a ranch near him has had a sudden upsurge in its horse population.

Frankie Reynolds (Frankie Darro' ), youngest member of a family of jockeys, borrows $4.85 (yes, four dollars and eighty-five cents) from his sister Phyllis (Gladys Blake), who is not a jockey, to buy a crippled colt from the stables owned by Clay Harrison (Kane Richmond). He nurses the colt back to health, and in two years has one of the fastest horses in the country.

A western town is being overrun and ruled by a gang of outlaws led by Bart (John Merton). Former Ranger Tim (Tim McCoy) is called out of retirement and assigned to clean up the gang. He disguises himself as a Mexican bandit, joins the gang and works from within.

A cowboy's brother falls in with a gang of thieves; when he tries to get his brother out of the gang, the gang orders his death--and tells his brother to kill him.

A Treasury Department engraver is being held captive by a counterfeiting gang that wants him to make counterfeit plates for them. A lawman is sent to rescue him.

Learning of Walters' inheritance, Larson kills him and assumes his identity. When Larson's men try to kill Walter's niece Lola, Jack Lane breaks it up. This leads to a showdown with Jack outnumbered by Larson and his gang. Having saved Loma's life earlier, he has Fuzzy ride for him and his men.

A Royal Canadian Mountie is assigned to bring in a criminal called "The Raven." The problem is that no one has ever seen him.

A thug robs and kills a fur trapper. He is caught and locked up by the Mounties, but is soon broken out by his partner. As the Mounties investigate, they discover that the two are part of a ruthless crime ring run by a female gangster.

When the Ranger Sergeant returns murdered with a note that LaFarge did it, Trooper Burke sets out to after LaFarge. Working undercover, he saves LaFarge's life and this gets him into LaFarge's gang. He then arrests LaFarge and brings him in only to learn that LaFarge is not only innocent but is now a prisoner of the real killer.

Sinclair has a government lease on range land that is about to expire. George Ringold wants the land and hires Roberts and his men. But they turn out to be a gang of killers and trouble soon arises.

A young reporter's grandfather wins a sweepstakes, but it turns out that his ticket is phony. The reporter finds out that the police are looking for the criminal ring responsible for the phony-sweepstakes racket, so he and his young brother set out to track down the gang responsible and expose them.

A deranged killer escapes into the Canadian woods. He tries to fool the locals by pretending he is a well known mystery writer, but the local Mountie starts to get suspicious.

A Texas Ranger is faced with the task of bringing his outlaw brother to justice.

A Mountie sets out to infiltrate and break up a gang of counterfeiters.

A young, newly-appointed rookie state trooper, John Shields, is celebrating with his sister Jane, his younger brother Freddie and Tom Marlin, Jane's fiancé and also a trooper, when they hear over the radio that two bandits have just killed a lawyer and his watchman. John and Tom set out in their patrol cars in hopes of capturing the killers, followed by Freddie who hopes some day to qualify as a trooper. Freddie encounters the two two bandits, Spike Doland and Butch and manages to get away with the bag of gold they had stolen. While chasing Freddie they are recognized by John who they kill when he tries to arrest them. Freddie then takes matters into his own hands in seeking to capture the killers of his brother.

The owners of a lumber mill hire an investigator to find out who is sabotaging their mill.