A U.S. Marshal goes undercover to stop a cattle smuggling gang, but when his cover is blown, the hunter becomes the hunted.
Dean, the Bailey County Judge, is the boss of both the outlaw gang and the Sheriff. He utilizes the state law that Sheriffs have jurisdiction only in their own county. After a raid the gang merely returns to the safety of Bailey County. The Governor sends Lawyer John Hayes. When he has no success as a Lawyer he leaves town only to return disguised as an outlaw with a scheme that will nab all the culprits.
Los Reyes County, Arizona. Leland, a retired lawman, works with Wallace, the new sheriff who replaces him, when a vicious hit man, sent by a Mexican drug cartel, threatens their border small town.
A former gunslinger is forced to take up arms again when he and his cattle crew are threatened by a corrupt lawman.
Ann and Tom Howard arrive from the east to take up ranching. But Tom wants to return and forges his sister's name to the deed and sells it to Larson. Eddie knows there is silver ore in the area and that Lawson, who killed the Sheriff, is out to get all the ranches. When Lawson appoints himself the new Sheriff, Eddie organizes the ranchers to fight Lawson and his men.
The Sheriff of Medicine Bow
Smokin' guns, swingin' fists, and a lovable side-kick can be found in this western.
As rustled cattle have mysteriously disappeared, Johnny sends for his friend Hoppy, Hoppy arrives and immediately suspects Dan Slack. Realizing his telegram about Slack was intercepted, he locks up the operator Lafe knowing he can escape. Tailing Lafe he finds a secret entrance to a mine and inside finds the missing cattle. But Slack's men also find him just as the cattle are stampeded through the mine shaft.
Lee Garvin has eloped with the daughter of a railroad man who didn't approve of the marriage. Hoppy steps in when the young man is framed for murder.
A banker is trying to cheat people out of their silver-rich land. Hoppy learns that the banker is in league with an outlaw gang.
At the reading of his late cousin's will, California learns the estate will be divied among whoever remains of the seven relatives. With one already dead, another immediately murdered, and the Lawyer telling them the ranch is almost worthless, Hoppy investigates.
Problems come in the form of one of Hopalong Cassidy's neighbors, but the matter is settled when Hoppy roots out the troublemaker.
Belle Langtry runs a town being taken over by cattle rustlers. She is also a front for the outlaws, who are led by Steve Fraser. Hoppy gets elected sheriff and cleans up the town with help from the Bar 20 boys.
The U.S. Army needs more horses for the Spanish-American War. Hoppy must turn his Bar 20 cowhands into Rough Riders to gather up the horses, and of course bad guys try to sabotage the operation.
When three Texas Rangers try to investigate kidnapped Mexicans being used as forced labor in the mines of Silver Bullet, they are framed for murder by the town's corrupt sheriff.
Hoppy goes undercover as an outlaw (which permits him, for once, to drink and be mean to children) to track down a bunch of outlaws operating along the border. Loco, the head bad guy, deflects suspicion from himself by pretending to be a moron.
Hoppy and new sidekick California Carlson head to California to help out Lucky Jenkins.
Hoppy returns to find Johnny in trouble. Buck Peters has been shot by Porter who made it look like Johnny did it. When Johnny flees he runs into Linda. He takes a liking to her only to learn her father Shanghai is one of Porter's gang. Going after Shanghai, he gets captured by the gang and Porter now plans to kill him. But Hoppy is near by and Johnny will get unexpected help from Shanghai.
Hoppy clears Lucky on a charge of bank robbery and foils the plot of a crooked lawyer to rustle a herd of pedigree cattle and take over the valley.
Hoppy, California and Johnny partner up with brother and sister ranch owners, two of several who are having their access to water blocked by a dam owned by a greedy merchant in town, who is intent on driving them out and taking their land for himself.