A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an army of robots based on his prototype to conquer America. The only one standing in his way is Bob Wayne, who fights Satan as the enigmatic Copperhead. Mysterious Doctor Satan is a 1940 film serial named after its chief villain. Doctor Satan's main opponent is the masked mystery man, "The Copperhead", whose secret identity is Bob Wayne, a man searching for justice and revenge on Satan for the death of his step-father. The serial charts the conflict between the two as Bob Wayne pursues Doctor Satan, while the latter completes his plans for world domination.
At the urging of his sweetheart, Rosemary Smith, a man (William Fairbanks) leaves his soft job in the east and goes west to settle a dispute over oil lands owned by Rosemary's father. This man evicts the wrong party and later must return west in order to set things right, protecting the honor of a girl from the advances of the crooked foreman.
The villain of this serial, the "Wolf Devil", who's head covering amazingly looks to be a REAL wolf's head, is determined to eradicate the non native races from Alaska.
A cult of Hindu tiger worshippers and a gang of Western outlaws try to cheat a young woman out of rich mines that belong to her.
An Indian rug is the key to the location of a lost treasure. When the rug's owner is murdered, it becomes a case for Forest Ranger Steve King
The Phantom Rider helps Mary Grayson thwart a plot to steal her land.
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.
Claim jumper Dave Marco and his boss Earl Foster, a crooked investment broker, hire chemist Ralph Brandon to falsify papers that a certain worthless mine is valuable then convince Ralph's mother to invest all her money in the mine. Ralph’s sister Holly meets Jack Mason, whose mine is actually valuable though not yet profitable, and they fall for each other. Once Mrs. Brandon finds out she has been duped, though forced into silence by the threat of having Ralph’s malfeasance exposed, and Marco attempts to jump Jack’s claim events come to a head until the happy conclusion.
Sergeant MacLane of the Mounties investigates the disruptive activities of a bunch of troublemakers.
A Secret Service agent seeks his missing brother in Africa, and finds his mission complicated by ivory thieves, a girl with a mysterious past, and a troublesome gorilla.
A new town doctor arrives at the same time as local Indians needprotection from troublemaking looters.
15 part adventure serial directed by W. S. Van Dyke survives in a Russian archive.
Six part adventure serial starring Mary Fuller as the sought after heroine. Episodes: 1) A Proposal From The Duke; 2) A Proposal From The Spanish Don; 3) A Proposal From The Sculptor; 4) A Proposal From Nobody; 5) A Proposal Deferred; 6) A Proposal From Mary
Calvin Drake employs a group of low-lifes to drive away land owners along the path of a new railroad; Red Ryder opposes this strategy.
A famous scientist invents a humanoid robot (the titular "monster"), so a greedy rival scientist plans to steal it for use in his criminal plans. His henchmen often kidnap a trained gorilla (the titular "ape") from the zoo, to aid in the schemes.
Helen, the telegraph operator at the Lone Point Station, shields Miguel, a greaser, under suspicion of having stolen some horses, until the real thieves are caught.
An escaped criminal impersonates a Police Commissioner, causing no end of trouble to a determined Federal Agent.
Dr. Ernst Grood , having already dominated the planet Ergro, now intends to take over the control of the Earth. Unfortunately for him, reporters oppose his sinister designs.
A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) endeavor to discover and thwart the loathsome saboteur Sakima.
Greedy traders have kidnapped a researcher, hoping he will reveal the location of a treasure in a hidden village. Family and friends of the researcher come looking for him. Adventure ensues.