Colonel Ferris, a wealthy farmer in northern California, is strongly opposed to hydraulic mining, a new method developed during the gold rush of the 1870's, which is flooding the area's prosperous farmlands. Despite Ferris' political stance, Jared Whitney, a mining engineer from the East, becomes friends with the colonel's son Lance and falls in love with his daughter Serena. Family tensions deepen when the colonel's brother Ralph gives up farming to go to San Francisco to work for his wife Rosanna's father, Harrison McCooey, a leader in the mining venture. When Lance follows Ralph, the colonel, focusing his anger on Jared, forbids him to see Serena.

Boston pharmacist Tom Craig comes to Sacramento, where he runs afoul of local political boss Britt Dawson, who exacts protection payment from the citizenry. Dawson frames Craig with poisoned medicine, but Craig redeems himself during a Gold Rush epidemic.

His Arizona hometown of Torpedo invites Gene back to be the honorary sheriff of the Frontier Days Celebration.

The Three Mesquiteers convince a group of settlers to exchange their present property for some which, unbeknownst to our goodguys, is going to be worthless. They are captured before they can warn the ranchers.

Two ex-cons plan to kill the range rider marshal who sent them to prison and, when their plan fails, join forces with their former boss, a crooked saloon owner who has the same idea.

Viennese surgeon Dr. Braun and his daughter Leni come to a small town in North Dakota as refugees from Hitler. When the winds of the Dust Bowl threaten the town, John Phillips leads the townsfolk in moving to greener pastures in Oregon. He falls for Leni, but she is betrothed to the man who helped her and her father escape from the Third Reich. She must decide between the two men.

Talbot uses a phony land grant to rule thirteen million acres, taxing everyone heavily and evicting those who won't pay. The Three Mesquiteers becomes mysterious "night riders" to fight this evil.

Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is thwarted repeatedly by three daring circus daredevils.

A mad doctor named Zanoff uses a drug to bring himself back from the dead after his execution in prison. Dick Tracy sets out to capture Zanoff before he can put his criminal gang back together again.

Bill Barlow, Jr., a wealthy young spendthrift out of favor with his father, sets out to prove himself at his father's lumber camp.

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.

In the midst of the Civil War, Lassiter has a plan to get control of California. Working out of St. Joseph, he plans to send forged messages to the troops on the west coast via Pony Express. First he attempts to bribe Pony Express ride Roy Rogers. When Roy refuses he turns to the outlaw Johnson and his gang and this leads to trouble.

Three bank robbers on the run happen across a woman about to give birth in an abandoned covered wagon. Before she dies, she names the three bandits as her newborn son's godfathers. Remade as Three Godfathers (1936) and 3 Godfathers (1949).

Roy is a Confederate officer stationed in Missouri during the Civil War. He must put an end to outlaw gangs working under the pretense of service to the Confederacy.

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.

Hoppy and Lucky have been called in to investigate a series of stage holdups. The robbers are taking gold from Colby's mine and Hoppy suspects it may be ex-outlaw Colby himself. When Speedy strikes gold, Hoppy borrows it and announces a gold shipment hoping to catch the gang and their leader.

Calvin Drake employs a group of low-lifes to drive away land owners along the path of a new railroad; Red Ryder opposes this strategy.

Bill Ralston arrives in town planning to settle down but quickly gets caught up in the fight between the townspeople and Poe Daggett and his gang. He takes the job of town Marshal and soon brings law and order. When Daggetts men ambush him he kills Poe's brother. Poe then kills Bill's friend Brant and this leads to the showdown.

Hoppy and new sidekick California Carlson head to California to help out Lucky Jenkins.

Roy Rogers is a cowboy who joins the Border Patrol, only to have his buddy Tommy get killed at a local saloon. Determined to get revenge at any cost, Roy and Rusty cross the border in search of Arizona Jack, the man responsible for Tommy's death.