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.
After the mysterious death of scientist Dr. Devin Villiers, Det. Frank Turner and his partner are as...
Cocky researcher Sebastian Caine is working on a project to make living creatures invisible. Determi...
Buffalo Bill Cody battles a gang of outlaws secretly headed by an unscrupulous lawyer.
A police detective is caught up in a plot to steal two million dollars in bonds.
A famous scientist invents a humanoid robot (the titular "monster"), so a greedy rival scientist pla...
Two British officers are assigned to collect information to convict Captain Kidd of piracy.
Mota is a Martian representative, who has come to impose interplanetary law on the Earth (which has ...
Prior to the United States' involvement in World War II, the masked vigilante Spy Smasher fights Naz...
Jerry Blake (aka Federal Operator 99) teams-up with Joyce Kingston to thwart the plans of escaped cr...
An expedition arrives on an uncharted jungle island to rescue the local natives, led by a jungle boy...
Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to creat...
A young girl journeys to Africa to find her father, an explorer who vanished in the jungle.
Greedy traders have kidnapped a researcher, hoping he will reveal the location of a treasure in a hi...
A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) e...
Congo Bill is hired to locate an heiress lost somewhere in Africa.
A Martian invader crashes his spaceship conveniently close to the workshop of a scientist who is dev...
Claire Forrest seeks her kidnapped scientist father, hidden somewhere on Mystery Island. He is hel...
Dr. Ernst Grood , having already dominated the planet Ergro, now intends to take over the control of...
Only Episode 7, "The Hooded Helper," of this 20-Episode Serial is known to survive. All other episod...
An accomplished aviator sets out to locate treasure hidden by one of his ancestors. He encounters i...