Daniel Robin has become mixed up with a band of criminals known as "the 13," and is shot when he refuses to do their bidding. His daughter Ruth, brought home from boarding school, reaches his bedside before he expires. He tells her that she will be given thirteen keys. Instructions will be provided with each key and, if she follows the instructions, she will eventually fully learn of her birthright. Many adventures then follow as Ruth attempts to solve the puzzle of each key and establish her true birthright.
The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a...
An Indian rug is the key to the location of a lost treasure. When the rug's owner is murdered, it b...
Famed aviator Bruce Gentry is working with scientist Andrew Benson, setting out to uncover the origi...
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 ...
Government agents try to thwart smugglers, while some sort of plot unfolds, about a hidden treasure ...
Kit Cardigan seeks the killer of his father...among other plot threads leading up to the famous hist...
Mystery and adventure, surrounding a stolen rubber harvest.
Four flying G-Men protect America against enemy spies; one of the four assumes the identity of The B...
Pulp hero "The Spider" seeks to destroy all criminals. In this serialized adventure, he battles The...
Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention.
The Strings of Steel is a silent Action serial. Episode titles: 1. The Voice on the Wire 2. The Firs...
A bunch of waterfront youths pursue the Sea Raiders, a gang of saboteurs.
The evil and masked "Gargoyle" is sabotaging all of America's industrial plants. It is up to the Spi...
The Hazards of Helen is an American melodramatic adventure film serial of 119 twelve-minute episodes...
Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, ...
A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret...
A movie serial in 12 chapters: After gold is discovered in the town of Nugget, the titular band of ...
The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the go...