Tailspin Tommy in The Great Air Mystery

Two marine lieutenants battle a masked would-be world conqueror who uses electricity as a weapon.

Dr. John Meredith has been driven from civilization by the criminal activities of his twin brother Bradley Meredith. With his infant daughter, he settles in the African jungle, where his ability to cure the native ills has resulted in his virtual control of the Masamba tribes, who possess vast diamond mines coveted by a gang of crooks.

A stirring drama of Wall Street manipulation of the world's wheat supply, which leads the characters into adventures and danger in various corners of the globe.

Government agents work to interfere with schemes to trick the Comanches into war with the Texans.

Before the outbreak of WWII, Nazi sympathizers plot to undermine America.

A movie serial in 13 chapters: Some swampland becomes valuable, and various factions squabble over ownership of it.

A bunch of waterfront youths pursue the Sea Raiders, a gang of saboteurs.

Man-woman team of investigators uncover a gang whose mad scientist leader has developed an invisibility chemical and plans to build a mercenary army of invisible men.

15 part adventure serial directed by W. S. Van Dyke survives in a Russian archive.

A newspaperwoman finds trouble aplenty when an Inca tribe believes her to be the reincarnation of their long-lost princess.

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

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

Mystery and adventure, surrounding a stolen rubber harvest.

Pulp hero "The Spider" seeks to destroy all criminals. In this serialized adventure, he battles The Octopus, who intends to replace the government of the United States.

Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention.

Captain Bob Dayton and Lieutenant Ed Carey are partners in a company called "Sky Raiders" which seeks US government contracts for its inventions. Enemy spies attempt to steal, sabotage and discredit the inventions and founders of the company.

Four youthful cadets are implicated in a series of murders, and must attempt to clear themselves of suspicion.

An escaped criminal impersonates a Police Commissioner, causing no end of trouble to a determined Federal Agent.

The obsessive scientist Dr. Miller is working on a matter-transmitter invention called the Paratron; a conspiratorial team of spies and no-goods pursue him to Alaska, trying to steal the device.

Dusty Bates observes some smuggled jewels hidden in a crate aboard a ship; he is pursued by low-lifes when the crate is put ashore.