It's just after the Civil War and Captain Morgan and his confederate soldiers are establishing a town on the Bozeman trail. Colonel Strong and his union men are at the nearby fort. Things are peaceful until Riley has the Indians attack a union wagon train and leave a confederate sword at the scene.
A masked hero called "The Eagle" leads California ranchers in a struggle against Russian Cossacks who are plotting to take over California and turn it into a Russian colony.
Reporter Steve Haines, on the trail of a business tycoon, follows his subject onto an ocean liner and gets wound up in a cruise full of intrigue, romance and murder.
Crash Corrigan, a recent graduate of Annapolis, and Diana, a go-getting reporter, join Professor Norton for a search for the source of a string of earthquakes, Atlantis. They ride Prof. Norton's rocket submarine searching the sea and little Billy Norton, the professor's son stows away, of course. When they find Atlantis they are caught in a war between peaceful Atlanteans, note their white capes, and war-monging Atlanteans, note their black capes. After many harrowing moments for Crash, Diana, Prof. Norton and Billy, they barely get away with their lives when they escape a tower of Atlantis raised to the surface for the sole purpose of dominating or destroying the Earth (Which one depends on the compliance of the upper world dwellers.)
A lawman captures the notorious "Pecos Kid", who is tried and hanged for his crimes--then starts to have doubts as to whether the Kid actually committed the crimes.
An evil gang is involved in both cattle rustling and the robbing of stagecoaches. Hoppy must stop them without help from the sheriff who turns out be a major outlaw himself.
Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth. Luckily, heroic young Flash Gordon is on hand to lead an investigative mission into outer space and onto the speedily approaching planet. There, he and his best girl, Dale, who is along for the ride, learn that Ming, the devious ruler of Mongo, has purposely put the planet on a collision course with Earth, and only Flash can stop him.
Chet Kasedon is after the Indians hidden gold mine but Chief Moya will not reveal it's location. He has also hired mining engineers Gale and Mortimer to locate the mine. When Gale sees Kasedon's cruelty to Moya, he switches sides.
Although Larry "Buster" Crabbe earns top billing, the hero of Drift Fence is former Western star Tom Keene as Jim Travis, who, at a rodeo, meets city dweller Jim Traft, who has come west to erect a fence that will prevent Clay Jackson from continuing his cattle rustling business. A tough Western type, Travis suggests that he impersonate Traft and the building of the fence soon begins. But Travis is opposed by Slinger Dunn and his family, whose small ranch will suffer from the division of the land. A romance between Travis and Slinger's sister, Paula, paves the way for a meeting of the minds, however, and Slinger switches sides completely upon learning that Travis is a Texas Ranger in disguise.
Wildcat riggers risk their lives in the pursuit of oil. Their jobs get even more dangerous when ruthless oil baron J.C. Anderson sets his sights on their territory. When longtime driller Dan O'Reilly falls to his death from a well tower sabotaged by Anderson's strong-arm thugs, his teenage son 'Fishtail' inherits the property and the troubles that come with it. With the help of his geologist pal, Hank Langford, the boy fights to bring in a gusher before the deed to the well-site expires.
Sheriff John Higgins quits and goes into prospecting after he thinks he has killed his best friend in shooting it out with robbers. He encounters his dead buddy's sister and helps her run her ranch. Then she finds out about his past.
Summoned by Ed Oliver, Jim Hale and sidekick Fuzz arrive at Oliver's ranch to find a range war in progress. Unknown to Jim, Ed Brady has kidnapped Oliver and replaced him with a stooge. Brady is after the Green ranch and Jim and Fuzz now set out to help Helen Green.
Captain Matthews is paid 40,000 dollars in cash by Nick Conrad for his shipment of silk from China. About 15 seconds after he gets the cash, he's lured away on a false pretence and robbed by Conrad's henchmen. Newspaper reporter Jerry Mason witnesses the robbery and steals the cash from Conrad.
John Wyatt is a government agent sent to smash a counterfeiting operation near the Mexican border. Joining Doc Carter's medicine show they arrive in the town where Curly Joe, who once framed Carter, resides.