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.

Christopher Powell is in Malaysia with his fiancée and her father, capturing wild animals. While out hunting, he is attacked by a tiger, and his native guides run away, leaving him for dead. But the tiger is the pet of Ulah, a beautiful young woman who grew up by herself in the jungle. She rescues Chris and takes him back to her cave, where she nurses him to health and falls in love with him. When he eventually returns to camp, she follows. The fiancée is jealous, and the natives don't like Ulah or her pet tiger either, all of which leads to a lot of trouble.

Government agents try to thwart smugglers, while some sort of plot unfolds, about a hidden treasure revealed by cursed coins.

White hunter Captain Fry tries to take Tarzan back to civilization, caged for public display. He arrives in the jungle with Jane's cousins, Eric and Rita, who want Jane's help in claiming a fortune left her.

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.)

Marion Hastings returns to her father Dan's cattle property in western Queensland after being away in Europe for fifteen years. She is treated with hostility by her father's foreman, Dick Drake, and her father's neighbour, Don Lawton.

Profiteer Alexander Stiles lays claim to a million acres of range in the Pecos River country, but a rancher named Claybor stands in his way as he has already claimed the water-rich location of Sweetwater as his own.

Kit Cardigan seeks the killer of his father...among other plot threads leading up to the famous historical incident.

The son of Sheriff Clay Hartley, of the frontier town Elder, has gotten into bad company and hangs out with an outlaw gang in which, Collins, owner of the Golden Rule Saloon, is the secret head. Sheriff Hartley suspects him, but has been unable to gather the needed evidence. Collins instructs his gang, including young Hartley, to hold up the stagecoach on its return trip from Missionary Flats and take the cargo of gold dust it is carrying. Sheriff Hartley is notified of the planned holdup by one of his deputies who has been spying on Collins, and organizes a posse. A deputy-sheriff is killed in the ensuing gunfight between the lawmen and the outlaws, but Deputy Joe Larkin, pursues and captures Clay Hartley Jr. The latter is quickly tried and convicted of the killing of the deputy, and sentenced to be hung. Sheriff Hartley has only a few hours to prove his son was not the killer. He enlists the aid of Collins' step-daughter, Joan, who is in love with Hartley's son.

The young Gascon D'Artagnan arrives in Paris, his heart set on joining the king's Musketeers. He is taken under the wings of three of the most respected and feared Musketeers, Porthos, Aramis, and Athos. Together they fight to save France and the honor of a lady from the machinations of the powerful Cardinal Richelieu.

Corporal Larry Grant and Sergeant "Mac" McGowan, of the United States Marine Corps, are rival for the love of Frances Schiller, but team up to hunt down "The Tiger Shark," a mad, scientific wizard who is holding Sergeant William Schiller, Frances' brother, a prisoner on a wild, jungle island in the Pacific.

Rodeo star John Scott and his gambler friend Kansas Charlie are wrongly accused of armed robbery. They leave town as fast as they can to go looking for their own suspects in Poker City.

When John Mason's father is killed, John is wounded. Attracted to his nurse Alice, a conflict arises between him and his friend Ben who plans to marry Alice. John later finds the killer of his father but goes to face him not knowing Ben has removed the bullets from his gun.

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.

A young couple and their child fall prey to kidnappers when a storm drives them into a seemingly abandoned farmhouse.

Mercenary Donovan is hired to kidnap King Peter II. He learns that the party in power is evil and that the King is in danger, so kidnaps the King to keep him safe while a revolution is planned.

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.

After a roustabout sailor avoids being shanghaied in 1850s San Francisco, his audacity helps him rise to a position of power in the vice industry of the infamous Barbary Coast.

Two Marine pilots vie for romance and glory.

Fort St. David, Cuddalore, southern India, 1748. While colonial empires battle to seize an enormous territory, rich in spices and precious metals beyond the wildest dreams, and try to gain the favor of the local kings, Robert Clive (1725-1774), a frustrated but talented clerk who works for the East Indian Company and struggles to earn his fortune, makes a bold decision that will change his life forever.

Captain Alan Gaskell sails the perilous waters between Hong Kong and Singapore with a secret cargo: a fortune in British gold. That's not the only risky cargo he carries; both his fiery mistress and his refined fiancee are aboard!

Dr. Peter Blood, unjustly convicted of treason and exiled from England, becomes a notorious pirate.

A small, independent air delivery service is menaced by a mad scientist with a death ray machine that blows up planes in mid-flight.

Ted Hayden impersonates a wanted man and joins Gentry's gang only to learn later that Gentry was the one who killed his father.