Scientists assembled to prove their methods are effective in criminal investigation try to solve a series of murders.

Pacific pearl diver Duke Slade escapes angry natives by joining a whaler whose dying captain persuades him to marry his daughter who is already being wooed by the first mate.

In the 15th century Richard Duke of Gloucester, aided by his club-footed executioner Mord, eliminates those ahead of him in succession to the throne, then occupied by his brother King Edward IV of England. As each murder is accomplished he takes particular delight in removing small figurines, each resembling one of the successors, from a throne-room dollhouse, until he alone remains. After the death of Edward he becomes Richard III, King of England, and need only defeat the exiled Henry Tudor to retain power.

An American girl falls for an RAF pilot while performing at a British music hall.

A group of delinquents on their way to summer camp get stuck in a haunted house.

Drummond manages to save a woman from jumping in front of his car but she runs away with his car. He traces her and she asks him to help her out of a dangerous situation.

A variety of people are searching for a long-hidden treasure somewhere on an island. Chapters: 1. The Isle of Fear, 2. The Ghost Talks, 3. The Phantom Duel, 4. Buried Alive, 5. The Girl Who Vanished, 6. Trapped by the Flood, 7. The Cannon Roars, 8. The Circle of Death, 9. The Pirate's Revenge, 10. The Crash, 11. Dynamite, 12. The Bridge of Doom, 13. The Mad Flight, 14. The Jaws of Destruction, 15. Justice

Wealthy widow Mrs. Bramson notices that her maid is distracted, and when she learns the girl's fiancé, Danny, is the reason, she summons him in. Mrs. Bramson's niece Olivia takes a liking to Danny, and comes to believe that he may have been involved in the disappearance of a local woman.

A love triangle occurs between the publisher's daughter Betty Moody. comic book artist Tim Jones, and the company's wily manipulative manager Hilton Payne. In addition, Betty's dad, Phineas Moody suffers from severe melancholy; and an emergency cure of laughter is required to save his health.

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.