1. The Crimson Ghost
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.
It has an average vote of 4.95 on TMDB.
2. K-9
The extravagant cop Michael Dooley needs some help to fight a drug dealer who has tried to kill him. A "friend" gives him a dog named Jerry Lee , who has been trained to smell drugs. With his help, Dooley sets out to put his enemy behind the bars, but Jerry Lee has a personality of his own and works only when he wants to. On the other hand, the dog is quite good at destroying Dooley's car, house and sex-life...
It has an average vote of 6.141 on TMDB.
3. 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.
4. 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.
5. 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.
6. 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.
7. The Great Secret
A wealthy young athlete comes to the aid of a beautiful heiress, whose fortune is being threatened by two arch villains, The Great Master and Doctor Zulph.
8. 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.
9. The Railroad Raiders
A silent movie serial
10. Million Dollar Haul
Special Insurance-Investigator Dan Kennedy and his wonder dog, Tarzan the Police Dog, are called in to investigate the persistent robbing of a shipping-and-storage warehouse in Los Angeles.
It has an average vote of 5 on TMDB.
11. The Adventures of Tarzan
Tarzan spurns the love of La, Queen of Opar. When he isn't trying to keep the Bolshevik Rokoff and Clayton 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.
It has an average vote of 5.8 on TMDB.
12. The Hope Diamond Mystery
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.
13. The Secret Code
A superhero known as The Black Commando battles Nazi agents who use explosive gases and artificial lightning to sabotage the war effort.
It has an average vote of 4.8 on TMDB.
14. 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.
15. Red Barry
A police detective is caught up in a plot to steal two million dollars in bonds.
16. 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.
17. The Iron Claw
Only Episode 7, "The Hooded Helper," of this 20-Episode Serial is known to survive. All other episodes are believed to be lost.
18. Federal Operator 99
Jerry Blake teams-up with Joyce Kingston to thwart the plans of escaped crime boss Jim Belmont.
It has an average vote of 6 on TMDB.
19. Hawk of the Wilderness
An expedition arrives on an uncharted jungle island to rescue the local natives, led by a jungle boy, from a volcano that is about to erupt.
It has an average vote of 7 on TMDB.
20. Daredevils of the Red Circle
Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is thwarted repeatedly by three daring circus daredevils.
It has an average vote of 5.5 on TMDB.