The Fortieth Door

Alice Grayson's uncle develops a wireless torpedo that can be controlled by radio. After he announces his invention to several of his colleagues, two of them murder the scientist, steal the blueprints and prototype, and make plans to sell both to the highest bidder. When Alice discovers the identity of the thieves, the intrepid heroine, with the help of Bob Moore, her two-fisted boyfriend, desperately tries to recover the plans and torpedo before enemy countries can unleash the torpedoes against American ships. (IMDb)

15-Chapter Serial about a scientist that discovers a formula for making synthetic gold and the people that want it.

A criminal mastermind known as The Crimson Ghost is out to steal a device called the Cyclotrode, which can short-circuit all electrical current on the planet.

Tarzan spurns the love of La, Queen of Opar. When he isn't trying to keep the Bolshevik Rokoff and Clayton (pretender to the Greystoke estate) from reaching Opar, he is attacked simultaneously by two lions, dropped into a pit when a volcano splits the ground, nearly sacrificed by sun worshipers, and so on.

Columbia's 34th serial production starring Buster Crabbe, the Serial King himself

A superhero known as The Black Commando battles Nazi agents who use explosive gases and artificial lightning to sabotage the war effort.

A 15-episode serial in which Beatty goes to darkest Africa to rescue the Goddess of Joba, who is being held by the high priest.

Treasury agents go after a ring of counterfeiters operating out of a traveling carnival.

A 12-episode serial in which scholastic sports star Frank Merriwell leaves school to search for his missing father. His adventures involve a mysterious inscription on a ring, buried treasure, kidnaping and Indian raids. He saves his father and returns to school just in time to win a decisive baseball game with his remarkable pitching and hitting.

Story concerns a paper mill, a mortgage and the struggle to obtain the lost formula for making paper from seaweed. Star is given opportunity to introduce many daredevil features.

A 15 episode serial in which Blake battles the "Scorpion" over possession of a 'death ray' machine.

Two safaris enter the African jungle intent on finding a white girl who is the heiress to a fortune. One safari, led by Jungle Jim, wants to make sure she gets the news that she is now a rich woman. The leaders of the other safari want to kill the girl so they can try to get hold of her inheritance.

The true story of Lord Francis Hope who inherits the Hope Diamond and marries showgirl May Yohe. Lord Francis Hope gambles away the family fortune and May Yohe leaves him. Another suspected curse of owning the Hope Diamond.

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

Prof. Millard pretends to be dead and helps Jeff King ferret out Vulcan, the evil traitor at the science academy. Donning his Rocket Man costume King goes from one hair raising rescue to the next in order to keep the newly invented Decimator out of the clutches of Vulcan and his minions.

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker wants to find the evildoer, among a host of suspects, but it will be difficult since the Wrecker can disguise himself to look like almost anyone

Originally written for Pearl White, this silent serial is a great action-packed adventure starring Molly King and Leon Bary. This serial had fifteen chapters, each one two reels in length. The chapters were: 1. The Lady in Number '7' 2. The Masked Stranger 3. An Hour to Live 4. Kidnapped 5. The Life Current 6. The Dead Come Back 7. Into Thin Air 8. The Stranger Disposes 9. When Jail Birds Fly 10. The Hole-in-the-Wall 11. Love's Sacrifice 12. Riddle of the Double Cross 13. The Face of the Stranger 14. The Hidden Brand 15. Mystery of the Double Cross.

Lure of the Circus is a 1918 American adventure film serial directed by J. P. McGowan.

The story of a boy, a dog, and a man. The boy discovers he is heir to a shipping line, and travels to Los Angeles, accompanied by inventor/radio operator Bob Whitlock and Irene Blaine. Their journey is aided by Pal, a wolf dog.

The Perils of Pauline is a motion picture serial shown in weekly installments featuring the actress Pearl White playing the title character. Pauline has often been cited as a famous example of a damsel-in-distress, although viewers will find her character more resourceful and less helpless than the classic 'damsel' stereotype. Nine episodes (from a condensed 1916 re-release) survive to this day.