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.
William BoydHopalong Cassidy
Russell HaydenLucky Jenkins
George 'Gabby' HayesWindy Halliday
Ruth RogersBarbara Hamilton
Stanley RidgesEarl Brennan / Dave Talbot
Frederick BurtonTom Hamilton
Jack RockwellCity Marshal
Roy BarcroftHenchman Ewing
Ed CassidyPierceWen WrightLane
A posse discovers a trio of men they suspect of murder and cow theft and are split between handing them over to the law or lynching them on the spot.
Tex Weaver is working under cover to bring in a gang of bank robbers. When he is killed, Tim Ross, a marksman with Doc Shaw's traveling show, takes over. Posing as a Mexican he lays a trap for the gang.
Gene responds to cattle rustling by stringing barbed wire all around his range.
A Western-genre narrative, loosely woven from old clips from B-Western features.
A notorious outlaw is recruited by a cattle buyer, secret boss of a gang of cattle rustlers, to impersonate the town sheriff, who is the outlaw's twin brother; and complications ensue, as the sheriff, now a hostage, is on the eve of his marriage while the outlaw's cantina-dancer girlfriend has followed him to town and is at risk of exposing him.
A cattle inspector runs a rustling ring on the side.
A rancher, frustrated with constant cattle rustling and the inability of the local sheriff to stop it, is accused of murder when the sheriff is found dead.
Cattlemen Protective Agent Reb Russell arrives to try and stop the cattle rustling. He gains a friend when he saves Jack Thorn from Lenahan and his men. They hire on at the Lund ranch and when her cattle are rustled and she is kidnaped they follow the trail, It's Lenahan and his gang and Reb soon finds himself a prisoner.
Notorious shootist and womanizer Quirt Evans' horse collapses as he passes a Quaker family's home. Quirt has been wounded, and the kindly family takes him in to nurse him back to health against the advice of others. The handsome Evans quickly attracts the affections of their beautiful daughter, Penelope. He develops an affection for the family and their faith, but his troubled past follows him.
When his cattlemen abandon him for the gold fields, rancher Wil Andersen is forced to take on a collection of young boys as his cowboys in order to get his herd to market in time to avoid financial disaster. The boys learn to do a man's job under Andersen's tutelage, however, neither he nor the boys know that a gang of cattle thieves is stalking them.
Hoppy and his pals arrive in a remote town to investigate the counterfeiting of both U.S. and Mexican money; his only clues are the name "Mordigan" and a drawing of a comet. He quickly finds out that Mordigan is the town "boss"; but what or who is "the comet", and why are Mordigan and his henchmen intent on persecuting a young woman, her drunken brother, and her deathly ill sister-in-law who've also just arrived in town?
Hoppy, California and Johnny come to the ranch of a friend and his daughter, disguised as dude detectives from the east, to investigate the disappearances, without a trace, of several herds of cattle.
Hoppy, Johnny and California go to Arabia to buy some horses. There they get involved with a sheik and a harem and a kidnapping plot.
Burton is after Clark's ranch. He gets the banker to refuse to renew Clark's note and then sends his men to rustle his cattle. Hoppy is Clark's new foreman and is on to Burton's scheme. But just as he learns of the rustling and is about to go after the gang, the Sheriff arrives and arrests him for hiding Johnny who has been accused of robbery.
Stagecoach robbers take the money Hoppy was going to use to buy cattle so Hoppy, California and Lin go after them.
When the outlaw El Toro saves Hoppy's life, Hoppy agrees to find his missing grandson.
Julie's husband has been murdered and land agents want her to sign away her property rights. Hoppy warns against this but she does so anyway. It looks as though she will be unable to deliver the timber called for in her agreement. Hoppy has to make the lumber deal happened and solve the murder.
Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.
The local school is causing Hoppy problems. First Bar 20 cattle are stolen when Hoppy investigates a problem there. Then the new teacher arrives and disrupts the routine of the Bar 20 hands. Later with the Bar 20 hands at graduation, the rustlers are poised to strike again. But there is dissension among them and this will lead to the break that Hoppy needs.
Escaped criminal "The Fox" hates Hoppy and a Rurales colonel for imprisoning him and lures Cassidy to Mexico in order to exact his vengeance.