When the ancient continent of Mu sank beneath the ocean, some of its inhabitant survived in caverns beneath the sea. Cowboy singer Gene Autry stumbles upon the civilization, now buried beneath his own Radio Ranch. The Muranians have developed technology and weaponry such as television and ray guns. Their rich supply of radium draws unscrupulous speculators from the surface. The peaceful civilization of the Muranians is corrupted by the greed from above, and it becomes Autry's task to prevent all-out war, ideally without disrupting his regular radio show.

A fictionalized account of the life of legendary Wild West sharpshooter Annie Oakley. Set in the quiet western town of Diablo, Annie and her little brother Tagg made sure that outlaws who moseyed into town kept on going. Often at her side was friend, suitor and deputy sheriff Lofty Craig with whom she often showed off her shooting prowess.

Jerry and Pamela North live in Greenwich Village in New York City. Jerry is a mystery magazine publisher who thinks he is a good amateur detective. He and his wife investigate various crimes and solve them before the police do.

A 12 episode serial starring Rex, the King of the Wild Horses and Rin-Tin-Tin, Jr. Rex is brought from the island of Sujan, where he is worshiped as a God-Horse, to the U.S. to be trained as a polo pony. He escapes, meets Rinty and with the help of Frank Bradley is returned to Sujan. The natives have been persuaded to turn against their God-Horse, however he is rescued just in time before he is burned as a sacrifice.

The adventures of a one-armed gunfighter (he lost the use of an arm during the Civil War) in the Old West.

In this Western, comprised of 12 chapters from a serial, Kit leads a group carrying a large gold shipment across the wild West. When the Mystery Riders attack and steal the gold, Kit is the only survivor. He later joins forces with the cavalry to retrieve it.

The adventures of a small town doctor working in the Arizona territory during the early 1900s.

A Secret Service agent searches the jungle for his missing brother, also an agent. He encounters a young woman there who is also searching, but for her missing father. They encounter a gang of ivory smugglers who hold a prisoner who knows the secrets of the missing people and a lost treasure. The pair are also menaced by a giant gorilla which guards the temple which is the smugglers' lair.