1. Jungle Jim
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.
It has an average vote of 4.8 on TMDB.
2. The Purple Monster Strikes
A Martian invader crashes his spaceship conveniently close to the workshop of a scientist who is developing an interplanetary craft. If the extraterrestrial Purple Monster can complete the rocket ship and return to Mars, he will be able to start a full-scale invasion of Earth. Good thing Craig Foster sets out to thwart the Monster's mission!
It has an average vote of 3.8 on TMDB.
3. The Monster and the Ape
A famous scientist invents a humanoid robot , so a greedy rival scientist plans to steal it for use in his criminal plans. His henchmen often kidnap a trained gorilla from the zoo, to aid in the schemes.
It has an average vote of 6.3 on TMDB.
4. Red Barry
A police detective is caught up in a plot to steal two million dollars in bonds.
5. Spell of the Circus
The manager of The Big Circus plots to marry the owner's daughter and gain control of the outfit.
6. Winners of the West
Beyond Hell's Gate Pass is territory controlled by a man who calls himself King Carter; he uses a variety of schemes to prevent the railroad from being built, for fear it will finish his control of his land.
7. The Great Alaskan Mystery
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.
It has an average vote of 5 on TMDB.
8. The Adventures of Dusty Bates
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.
It has an average vote of 4 on TMDB.
9. The Valley of Vanishing Men
Prospector Henry Tolliver disappears and his son "Wild Bill" Tolliver comes looking for him.
10. The Master Key
A movie serial from 1914
11. Nan of the North
A Canadian Mountie and a young girl team up to prevent an evil couple from finding a fallen meteorite that contains a powerful element called "Tilano."
12. Flash Gordon
Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth. Luckily, heroic young Flash Gordon is on hand to lead an investigative mission into outer space and onto the speedily approaching planet. There, he and his best girl, Dale, who is along for the ride, learn that Ming, the devious ruler of Mongo, has purposely put the planet on a collision course with Earth, and only Flash can stop him.
It has an average vote of 6.3 on TMDB.
13. The Secret of Treasure Island
A variety of people are searching for a long-hidden treasure somewhere on an island. Chapters: 1. The Isle of Fear, 2. The Ghost Talks, 3. The Phantom Duel, 4. Buried Alive, 5. The Girl Who Vanished, 6. Trapped by the Flood, 7. The Cannon Roars, 8. The Circle of Death, 9. The Pirate's Revenge, 10. The Crash, 11. Dynamite, 12. The Bridge of Doom, 13. The Mad Flight, 14. The Jaws of Destruction, 15. Justice
It has an average vote of 4 on TMDB.
14. Junior G-Men of the Air
A group of street kids battle a terrorist gang led by a Japanese spy.
It has an average vote of 6 on TMDB.
15. Drums of Fu Manchu
The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a prophecy that will enable him to conquer the world. His nemesi, Dr. Nayland Smith and his associates fight to keep the evil doctor from getting his hands on the keys. In 1943 the serial was edited together into a feature movie also called Drums of Fu Manchu.
It has an average vote of 6.1 on TMDB.
16. Dick Tracy Returns
Dick Tracy battles spies and saboteurs in his efforts to bring to justice the Stark gang, a criminal family led by the vicious Pa Stark.
It has an average vote of 5.8 on TMDB.
17. The Fighting Devil Dogs
Two marine lieutenants battle a masked would-be world conqueror who uses electricity as a weapon.
It has an average vote of 6 on TMDB.
18. The Invisible Monster
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.
It has an average vote of 4.4 on TMDB.
19. Pirate Treasure
An accomplished aviator sets out to locate treasure hidden by one of his ancestors. He encounters interference from various adversaries.
It has an average vote of 4 on TMDB.
20. G-Men Never Forget
An escaped criminal impersonates a Police Commissioner, causing no end of trouble to a determined Federal Agent.
It has an average vote of 7 on TMDB.