In the 1840's Mexico has ceded California to the United States, making life nearly impossible for the Mexican population due to the influx of land and gold-crazy Americans. Farmer Joaquin Murrieta revenges the death of his wife against the four Americans who killed her and is branded an outlaw. The reward for his capture is increased as he subsequently kills the men who brutally murder his brother. Joining with bandit Three Fingered Jack, Murrieta raises an army of disaffected Mexicans and goes on a rampage against the Americans, finally forcing his erstwhile friend, Bill Warren, to lead a posse against him.

The spoiled, hard-partying son of a senator runs away from home after being reprimanded by his father, finds himself down-on-his luck in a tiny western town, and is rehabilitated through the friendship and wisdom of a kind and patient rancher.

A 12-episode serial in which Tim Tyler goes to Africa in search of his father in gorilla country. He meets up with Laura, who is after Spider Webb who has framed her brother. Webb causes the death of Tim's father, but is eventually tracked down.

Renfrew of the Mounties hunts brother-and-sister gold hijackers.

A ranch owner gives the Cheyenne Kid $1000 and sends him off to buy cattle. At the same time he fires a ranch hand and that hand rides ahead and alerts Jeff Baker about the $1000. Bakers' henchman are too late to get the Kid but they kill the rancher paid by the Kid. The Sheriff then arrests the Kid claiming he murdered the rancher to get the money back and that Baker said he then lost it at his gambling table.

The Rough Riders are after a gang of rustlers. Marshal Roberts is posing as a wanted outlaw, McCall is the Marshal supposedly after him, and Sandy is on hand as a cook. Roberts hopes his joining the gang will help bring them in.

Tex and Shorty ride into Cinco Valley, a gold rich area terrorized by marauders ostensibly lead by one Pablo. Tex, however, recognizes Blackie, whose boss is Bannister, an American. Suspecting that Bannister and his henchmen are trying to drive the settlers off their potentially valuable land by posing as Mexican banditos, Tex convinces Pablo to help him set a trap for the marauders.

A female detective investigates the kidnapping of a wealthy businessman.

In an effort to get Jim Martin to sell his ranch, the Halsey brothers have kidnapped his son Tom. When Bob Burke goes after him alone, he gets help from the gang known as the Riders of the Sage.

Beyond Hell's Gate Pass is territory controlled by a man who calls himself King Carter; he uses a variety of schemes to prevent the railroad from being built, for fear it will finish his control of (what he considers) his land.

The Royal Mounties are called in when one of the armored cars owned by Maxwell, containing a gold shipment, disappears with driver George Hill suspected of trying to get away with the gold. Actually, Maxwell and two henchmen had poured acid on the brake lines, causing the car to crash. Genevieve, daughter of the Mountie chief, suspects Maxwell and Thomas Hatch, president of the bank shipping the gold, but she quickly becomes more trouble than help to Sergeant Renfrew in charge of the investigation. Renfrew and Constable Kelly drive the next shipment but Maxwell plans to make them crash the same way as Hill did. Renfrew steers the vehicle into a hillside and this gives him an idea of what happened to the other car.

Kent wants the Allen ranch. So he has Steve and his men rustle their cattle using Pete as an informant. When the Trigger Pals Lucky, Stormy, and Fuzzy fight back, Kent frames Stormy for the rustling.

Desperados menace a mining operation.

When the plane owned by the "Yukon and Columbia Mail Service" crashes, RCMP Sergeant Renfrew (James Newill) and Constable Kelly (Dave O'Brien) suspect murder. Their suspicions are confirmed when Renfrew finds the control stick has been jammed, forcing the plane to fly in one direction until the gas ran out. Mine owner Louise Howard (Louise Stanley) reports that her superintendent is missing. The Mounties find him murdered and that too has been made to look like an accident. A new mail service pilot, Bill Shipley (Warren Hull), arrives. He had gone to training school with Renfrew but had been cashiered for misconduct. The Mounties discover that Raymond (Karl Hackett), who had been working for Louise, really owns the flying line managed by Yuke Cardoe (William Pawley.) They find proof that all the gold from the mine isn't being turned over to Louise, and suspect that Raymond and Yuke are stealing the gold and shipping it to Seattle by plane.

Sgt. Renfrew and Constable Kelly go aloft to search for a plane missing with a shipment of gold from the Yukon Mine Company. Inventor Speavy has devised a power ray which disrupts electrical impulses, and Morgan and his gang of crooks has brought in Prof. Lewis to increase the ray's range, telling him he's helping the government develop this new weapon. Speavy spills the beans to Prof. Lewis and his daughter Madeleine,and Morgan threatens to implicate them in his crimes unless they cooperate. Morgan kills Speavy when he tries to warn Renfrew, but when Madeleine stows away on board the doomed plane Renfrew is piloting, will the crooks be able to make Prof. Lewis use the power ray to bring the plane down?

William Bakewell stars as an inventor who develops a high-powered boat engine. Bakewell, of course, created this wonder machine to benefit mankind-and, incidentally, to win an upcoming motorboat race.

A police detective is caught up in a plot to steal two million dollars in bonds.

Before changing his name to Richard Powers, cowboy hero Tom Keene spent the waning days of his stardom at Monogram, churning out westerns like Riding the Sunset Trail. When ingenue Betty Dawson (Betty Miles) and her kid sister Sugar (Sugar Dawn) are cheated out of their cattle ranch, Tom Sterling (Keene) and his sidekick Mendoza (Frank Yaconelli) vow to get the ranch back for the girls. This requires Sterling to cross six-guns with Pecos Dean (Gene Alcase), a former friend who'd turned bad.

A police chief and two security agencies work to find out who is behind a recent rash of hijackings.

Seeking his brother’s murderer, cowboy Jack Gray and his sidekick Lopez sign on for work at a horse ranch where the foreman is up to no good.