A husband and wife detective team takes on the search for a missing inventor and almost get killed for their efforts.

After a detective is assaulted by thugs and placed in an asylum run by Professor Baum, he observes the professor’s preoccupation with another patient, the criminal genius Dr. Mabuse the…

A ruthless, crooked stockbroker is murdered at his luxurious country estate, and detective Philo Vance just happens to be there; he decides to find out who killed him.

While vacationing in St. Moritz, a British couple receive a clue to an imminent assassination attempt, only to learn that their daughter has been kidnapped to keep them quiet.

In London, a secret society led by lawyer Thaddeus Merrydew collects the assets of any of its deceased members and divides them among the remaining members. Society members start dropping…

A young woman turns to Holmes for protection when she’s menaced by an escaped killer seeking missing treasure. However, when the woman is kidnapped, Holmes and Watson must penetrate the…

A domineering money-bags’ suppressed incestuous urges go into overdrive when her half-brother brings a new bride home to the family’s gloomy Fifth Avenue mansion. The title refers to a secret…

Not long before marine officer van Hauen goes off to war and heavy-heartedly leaves his family, he coincidentally discovers that his wife has a secret liaison with the dubious Count…

A charming and very daring thief known as Arsene Lupin is terrorizing the wealthy of Paris, he even goes so far as to threaten the Mona Lisa. But the police,…

British Egyptologist, Professor Morlant, seeks immortality through the power of a jewel buried in the tomb of an Oriental idol. Upon his death, Morlant returns to earth to seek vengeance…

When a radio star is found murdered in her home, everyone assumes that the mysterious young woman discovered with her is the culprit — everyone, that is, but newspaper reporter…

A con man who stages phony “lucky legs” beauty contests and leaves town with the money is found with a surgical knife in his heart by Mason.