Trouble has been reported in Placerville where Tom Barton's brother is the Marshal. Arriving Tom finds a phoney Marshal in his brother's place. Learning that Clark is behind the all the trouble and that he is after the Madison stage line, Tom joins up with Mary Madison to fight Clark while he also looks for his missing brother.

Clay Morgan kills Joel Potter and Marshal Manning has to arrest the brother of the girl he plans to marry.

A dying Marshal gives his identification papers to Tom. After Tom arrives in town, the papers drop and are found during a fight so Tom decides to assume the Marshal's identity. Mason, the chief, now sends Rattler, the killer of the Marshal, to also kill Tom. But when he overhears Tom is a fake, they change their plans and now go to arrest Tom for the murder of the Marshal.

Ranch owner Sandra, fresh from animal husbandry school, brings a flock of sheep into cattle country. The local ranchers don't like it, and ranch foreman Gene must deal with it.

Gene and Frog arrive with a herd of horses for Gene'e brother, a diamond prospector whose work has attracted the interest of a bunch of badguys.

Deputies Gene Autry and Frog go up against modern cattle rustlers. These rustlers use technology such as, airplanes, radios and refrigerated trucks to steal the cows, butcher them in the field and ship them out before getting caught. This causes the town to bring in a modern NYC detective to catch the crooks, but will Autry and Frog be permanently out of a job?

Cattlemen's Protective Association agent Tom Wade and his partner Happy are assigned to look into the disappearance of rancher John Carroll, who has been abducted by Carson, who wants to use his out-of-the-way ranch as a base for his smuggling operations. Complications arise as Carrol's daughter, Rita, looking for him, has an unfriendly run-in with Wade, then later is herself kidnapped by Carson.

Tyler is a range detective whose brother stands accused of robbing a bank and murdering the bank president. To prove him innocent, Tyler must decipher his only clue, an unusual set of tire tracks.

The old west range war story transported to Georgia, with Autry as the hero.

Harris and Rigby own a circus. Rigby is a counterfeiter and frames his partner. The Mesquiteers learn Rigby is the culprit and get a confession from one of his men only to lose the case when the man is murdered in jail. The Mesquiteers try again and send Lullaby to try and win some of the fake bills in a card game.

When Professor Marsh disappears while searching for the lost city of Lukachukai, his daughter enlists the help of the Three Mesquiteers.

Rancher entertains girl in Nevada to get a divorce. Then her gangster husband shows up.

Cowboy Larry O'Day and his sidekick Lucky Smith happen upon a distraught Barbara Hartwell, who is about to be arrested for the murder of her uncle. With Barbara behind bars, Larry is determined to find the real killer and soon finds himself in the middle of a mystery involving crazed German entomologists and a smuggling ring bringing Chinese "picture girls" across the Mexican border for sale to wealthy Chinese bachelors.

"Nevada" and "Weary" Pierce hijack the loot taken in a bank hold-up by Les Setter, and his gang. They escape from Sheriff Jim Henry Warner. U. S. government horse-buyer David Ward is killed by Settler's men and Settler takes his papers and goes to the ranch of Blaine and asks for the horses Ward was to buy, promising payment from the government later. He also takes an interest in Ina Blaine, much to the resentment of her sweetheart Ben Ide. "Nevada" and "Weary" are hired for the horse round-up but Setter has them and Ben arrested on a fake charge.

After Pat Garrett kills Billy the Kid, Billy's look-alike Roy Rogers arrives and is mistaken for him. Although a murderer, Billy was on the side of the homesteaders against the large ranchers. As Billy's death is unknown, Roy gets Garrett to let him pose as Billy to continue the fight, but without the killing.

Rancher Reynolds has fired his men and hired killers and is now using a crooked land deal to put the other ranchers off their land. Calico finds the reason why when he runs into his old nemesis Porter.

Stony's brother George has been accused of murder and the Mesquiteers have returned to prove his innocence. But they find that Harvey rules the town along with his stooge Sheriff Gray and that George won't get a fair trial.

When Len Stoddard wins Ted Ames ranch in a poker game he sends his brother Jake along with Ted to take over the ranch. When Jake is found murdered he offers a reward for the capture of Ted who now is believed to be a member of the Black Aces gang. Ted finds the probable location of the gang's hideout and sets out to clear himself.

Dare Rudd takes a shine to his cattleman cousin Tom's girlfriend who asks Tom to hire Dare to head the big cattle drive. Dare loses the money for the drive to cardsharps, but Tom wins it back, but Dare must save Tom's life.

Jeff arrives in town to see the Sheriff only to find him just killed. The culprit is Clay Wheeler. When Jeff becomes friendly with Letty, Clay sends his man Ortega to kill him. Jeff foils the attempt and gets him to confess that Clay was the killer. With only old-timers Lafe and Bill to help, Jeff heads after Clay and his gang.

When he swaps horses with the Tombstone Kid — a wrongly accused man on the run from the law — singing cowboy Tex Randall gets arrested by the local sheriff in a case of mistaken identity.

A crooked real estate manipulator sells worthless land on mortgage to flood refugees, then tries to profit by reselling the land to the state, committing murder in the process, as the Three Mesquiteers work to bring him and his gang to justice.

A Texas Ranger (Roy Rogers) and his pals come out of forced retirement to do what the cavalry cannot.

Scanlon is pulling off a land swindle by selling lots in a ghost town claiming the power company is bringing in a line. As a bonus he throws in shares in a worthless gold mine. Gene is on to Scanlon and tries to get him to buy back the deeds by salting the mine with gold. But when a new vein is really discovered Gene has to stop the sales but is trapped in the mine by Scanlon's men.

After saving himself from hanging, Laramie Nelson saves Tracks Williams from the same fate. They then travel to Lindsay's ranch where they get jobs. There they run into Adams who they learn is planning to rustle Lindsay's horses.

Kalmus is after the freight contract held by Summers. When his gang kill Summers, Tex and Duke step in to help Madge keep the freight line going. When they foil the gang's further attempts, Kalmus gets the Judge to jail the two.

Tex is up against a group of hooded outlaws. When he shoots one, he uses the hood to infiltrate the gang. Almost caught by them, he escapes only to be arrested by the Sheriff who thinks he's one of the gang.

As the sheriff of a small western town, Autry sings his way into a relationship with Eleanor, a singer from a Chicago nightclub who earlier witnessed a murder.

Saunders with his Cattlemen's Protective Agency is running roughshod over the ranchers. Lawyer Larry Kimball is fighting him but he needs a rancher that will stand up with him against Saunders. He finds him when Lou Gehrig retires from baseball to take up ranching. Lou expects to relax on his ranch but quickly joins Larry in the fight.

The arrival of the telegraph put Pony Express riders like John Blair and his pal Smoky out of work. A race will decide whether they or stageline owner Drake get the government mail contract.