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In San Francisco, detective partners Jack Packard and Doc Long are hired by socialite Jefferson Monk who believes someone is following him with the aim to kill him.

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Aircraft factory worker Barry Kane flees across the United States after he is wrongly accused of starting the fire that killed his best friend.

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Frankenstein's unscrupulous colleague, Dr. Bohmer, plans to transplant Ygor's brain so he can rule the world using the monster's body, but the plan goes sour when he turns malevolent and goes on a rampage.

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Chan is faced with suspects in a stolen atomic bomb formula case, that are being killed with bullets that are not fired from a gun.

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With three days before his paper folds, a crusading editor tries to expose a vicious gangster.

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Career-slipping movie star Carole Raymond buys in as a real estate partner of Jeff Caldwell. Actually, through his secretary, Nola Reed, Caldwell runs a matrimonial bureau and, with the aid of his associate, Lee Kirby, they defraud and blackmail a large group of lonely people. Carole, unknowingly, is used as bait for one of their victims, Walter Desmond, who "commits suicide." Reporter William Tyler thinks otherwise.

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A man listens to his wife and fakes his own death so that she can get her hands on his insurance policy.

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"The Unknown" was the final entry in Columbia’s I Love A Mystery series. A woman hires two detectives to keep her alive long enough to claim her inheritance.

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A San Francisco airplane bound for South America crashes, and among the scorched debris is found a shrunken native human head, neatly packaged. The perplexed police contact a local anthropology museum about this unclaimed piece of grisly baggage, where they intersect with Jack and Doc, two private eyes, called there to meet a mysterious woman who had a case for them and wanted to meet in private.

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Rawley University is about to receive a star athlete who could give it the first championship rowing team it's ever had. Unfortunately, he gets drafted into the army before he's able to join the team. Two of the team's members get the bright idea of passing off a burly truck driver as the "athlete". Complications ensue.

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"Kilroy Was Here" was a popular expression during World War II, but it's not much fun to John J. Kilroy, who has to try to live with all the jokes and wisecracks regarding his name.

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The first of Monogram's "Father" series was Henry, the Rainmaker, assembled in a fast seven days. Henry Latham is an average family man who is galvanized into entering a mayoral race over the issue of garbage disposal. When incumbent mayor Colton solves this issue himself, Henry turns his attentions to the current water shortage. His efforts to become a rainmaker prove cataclysmic, to say the least.

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Dr. Christian takes time out from his appointed rounds to help clear a bank teller of embezzlement charges.

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Vera thinks she's witnessed a man decapitating his wife. Actually, she's only seen magician Bluebeard the Great rehearsing his act. Still convinced that the magician is a killer, Vera goes through all sorts of comic agony when she is forced to share the same train compartment with Bluebeard (who doesn't help matters when he offers her a sandwich consisting of "scrambled brains and tongue").

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This tale of two tugboats focuses upon the rivalries between two operators competing to win a major shipping contract. Meanwhile a tugboat office secretary and an ex-con who wants to go straight, fall in love. Tugboat Annie is put in charge of a child violinist. When a waterfront fire breaks out, the two warring captains join forces to put it out.