A golddigging femme fatale leaves a trail of men behind her, rich and poor, alive and dead.

A marine biologist and a government agent investigate mysterious deaths and rumors of a sea monster in a secluded ocean cove, and find themselves involved with a marine biology professor conducting secretive experiments, international spies trying to steal his secrets, a radioactive light on the sea bottom, and the malevolent thing which guards it.

Two escaped convicts are found hiding in a rocketship built by a renegade inventor, who forces them to become the crew for a trip to the Moon. Also on board, as inadvertent stowaways, are his assistant and his secretary; and none of them are aware that the inventor is actually a Lunarian explorer sent to Earth by the dying Lunar civilization and the only remaining male member of that civilization.

In 1897, little Priscilla Williams, along with her widowed mother, goes to live with her army colonel paternal grandfather on the British outpost he commands in northern India.

Famed detective and crime novelist Ellery Queen solves a case involving the suspicious death of a rich man whose inheritors fight over his estate.

A Nazi spy ring is after a chemical formula that increases the power of ordinary gasoline for U.S. Army aviation use. Two U.S. chemical companies are developing the formula, with each working on half for security purposes. The spies get half the formula and know that either of two chemists, Robert Norton or Tom Fielding, knows the rest. They capture Fielding, through a ruse by gang member Linda Pavlo, and threaten the life of his sister Nancy and his mother if he does not give them the formula. To protect his friend Fielding, who does know the formula and is engaged to Nancy, Tom pretends to know the secret and boards the Dawn Express plane with the spy leader and his gang.

When two outlaw gangs team up to rob gold shipments, the U.s. Army sends their ace-troubleshooter, Dan Parker, to the area. Sam Casey, the mystery-man behind the gangs, kills Parker's father, and this induces his sweetheart, Rita Starr, to side with the law-and-order faction. An attempt by Casey to kill Rita is foiled by Parker, which leads to a widespread gun-battle. Written by Les Adams

A charismatic charlatan begins a business — and eventually romantic — relationship with a roadside evangelist to sell religion to 1920s America. Based on Sinclair Lewis' novel of the same name.

Hank Wilson is a driver for a truck for a big transportation company which is in financial straits. He is in love with Doris Lacy, a waitress at the truck-stop where the company has its truck fleet serviced. Frequent accidents near the place leads the company to hire a private detective to investigate, and when the detective is murdered Hank is arrested as a suspect. The insurance company that covers the fleet has him released and he is sent back to work with instructions to investigate the accidents on his own. The trail leads to the uncle of Doris, and one of the part-owners of the company.

Newspaperman (Whalen) looks into the deaths of bond-carriers while romancing a show girl (Rogers).