The Master Key (1945)
Before the outbreak of WWII, Nazi sympathizers plot to undermine America.
Top billed cast
Milburn StoneAgent Tom Brant
Jan WileyJanet Lowe
Dennis MooreJack Ryan
Addison RichardsGerhard Doenitz / Garret Donahue
Byron FoulgerProf. Elwood Henderson
Maris WrixonDorothy Newton
Sarah PaddenAggie
George LynnHerman
Russell HicksPolice Chief Michael J. O'Brien
Roland VarnoArnold Hoffman
Similar to The Master Key
The Purple Monster Strikes (1945)
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!
Manhunt of Mystery Island (1945)
Claire Forrest seeks her kidnapped scientist father, hidden somewhere on Mystery Island. He is held and forced to work on diabolical inventions by Captain Mephisto, a costumed villain.
Zorro's Fighting Legion (1939)
The mysterious Don Del Oro ("Lord of Gold"), an idol of the Yaqui Indians, plans to take over the gold and become Emperor. Francisco was put in charge of a legion to combat the Yaqui tribe and protect the land, but when attacked Zorro came to his rescue. Francisco's partner recognized Zorro as the hidalgo Don Diego Vega, then ask him to take over the fighting legion as his alter-ego Zorro.
Rustlers of Red Dog (1935)
A movie serial in 12 chapters: After gold is discovered in the town of Nugget, the titular band of thieves and cutthroats inundates the frontier settlement. A group of three compatriots -- upstanding ex-sheriff Jack Woods, his harmonica-playing friend Laramie and tricky, smooth-talking gambler Deacon -- combine their respective skills in a fateful struggle to deceive and disarm the gang.
The Valley of Vanishing Men (1942)
Prospector Henry Tolliver disappears and his son "Wild Bill" Tolliver comes looking for him.
Bruce Gentry (1949)
Famed aviator Bruce Gentry is working with scientist Andrew Benson, setting out to uncover the origin of a deadly secret weapon---an electronically controlled flying disc which can be directed at moving or stationary targets. The disc was master-minded by an enemy agent known only as "The Recorder" because...he speaks entirely via recordings. Aided by rancher Frank Farrell and his sister Juanita "Nita" Hodges, Gentry consistently foils "The Recorders" schemes, which are carried out by "The Recorder's" henchmen, Krendon, Allen and Chandler, including an attack on the Panama Canal.
Scouts to the Rescue (1939)
Filmed in the Sierra Nevada mountains near Sonora, California, this Universal serial is Universal's 40th sound-era serial. Eagle Scout Bruce Scott, leader of Martinsville Troop Number One, and his pack sets off in search of lost treasure and finds adventure
The Girl and the Game (1915)
Irrepressible Helen Rhinelander, the daughter of a railroad president. A dastardly villain, Segrue, however, desires not only Helen but also the plans for a new railroad. Happily, Helen's childhood sweetheart, Paul Storm, now an engineer, is right there to protect the damsel-in-distress through the serial's 15 exciting chapters.
The Great Radium Mystery (1919)
Criminals steal a radium-powered tank from an inventor. His heiress and a government agent take up the chase.
The Strings of Steel (1926)
The Strings of Steel is a silent Action serial. Episode titles: 1. The Voice on the Wire 2. The First Central 3. Fighting for Love 4. The Power of Might 5. Kings of the Wire 6. Voice of the Continent 7. Telephone Poles 8. War of the Wire 9. When Lightning Strikes 10. Love and Victory.
The Hazards of Helen (1917)
The Hazards of Helen is an American melodramatic adventure film serial of 119 twelve-minute episodes released between November 7, 1914 and February 24, 1917. Most episodes of this serial are presumed lost.
The Adventures of Smilin' Jack (1943)
A movie serial in 12 chapters: The famous comic strip character is on a mission to protect a secret tunnel passage between China and India.
The Adventures of Ruth (1919)
Daniel Robin has become mixed up with a band of criminals known as "the 13," and is shot when he refuses to do their bidding. His daughter Ruth, brought home from boarding school, reaches his bedside before he expires. He tells her that she will be given thirteen keys. Instructions will be provided with each key and, if she follows the instructions, she will eventually fully learn of her birthright. Many adventures then follow as Ruth attempts to solve the puzzle of each key and establish her true birthright.
The Spider Returns (1941)
The evil and masked "Gargoyle" is sabotaging all of America's industrial plants. It is up to the Spider to save the country.
Flash Gordon (1936)
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.
The Phantom Rider (1946)
A new town doctor arrives at the same time as local Indians needprotection from troublemaking looters.
The Monster and the Ape (1945)
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.
Pirate Treasure (1934)
An accomplished aviator sets out to locate treasure hidden by one of his ancestors. He encounters interference from various adversaries.
The Invisible Monster (1950)
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.
Queen of the Northwoods (1929)
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.