A mysterious criminal known as The Whispering Shadow commits crimes by means of a gang he controls by television and radio rays. Jack Norton, whose brother was murdered by The Whispering Shadow, suspects that the eerie Professor Strang - whose ghostly wax museum contains figures far too lifelike - may be involved in the crimes.

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 hypnotist. When Mabuse's notes are found to be connected with a rash of recent crimes, Commissioner Lohmann must determine how Mabuse is communicating with the criminals, despite conflicting reports on the doctor's whereabouts, and capture him for good.

As the demand for raw silk goes sky high, crooked businessman Wallace Myton corners the market with plans to drive up the price. Determined to fulfill his contracts, manufacturer Donald Kilgore imports $3 million worth of silk to Seattle and accompanies it by special train to New York. But when his secretary is found murdered, Kilgore soon discovers Myton has planted three killers on board with orders to stop the express and its passengers dead in their tracks.

Con-man Chandler and his partner Frank decide to start a clairvoyant act. Chandler falls for Sylvia, one of their marks, but their relationship is challenged when his deception impacts others' lives and Sylvia urges him to reform.

A murder at a country house centres around the whereabouts of a horde of stolen diamonds and the unmasking of people who are not as they at first seem.

When a famous doctor kills his adulterous wife, he is defended by his best friend, an attorney who suspects that his own wife is having an affair.

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 upon those who removed the jewel from his grave.

Driven to desperation by his young and extravagant wife, alienist Dr. Emil Brandt has arranged a perfect crime; now he begs the police to lock him up before he can commit it.

After her brother's death, Roma Courtney becomes the heiress to his fortune. When a fake psychic claims to have a message from Roma's dead brother, he coaxes her into participating in a séance. While her fiancé first believes the séance is nothing more than a scam, he eventually realizes that the vengeful spirit of an executed murderer has possessed Roma's body.

According to a legend, the mansion's "blue room" is cursed -- everyone who has ever spent the night in that room has met with an untimely end. The three suitors of the heroine wager that each can survive a night in the forbidding blue room.

Gertie Waxted knows how notorious gangster Jim Crelliman runs his rackets, because she's long been under the hoodlum's thumb. She's secretly helping lawyer Jackson Durant in a snoop job aimed at pinning a murder on the thug. Her life will be in peril when that secret gets out.

The disappearance of people and corpses leads a reporter to a wax museum and a sinister sculptor.

Kay and June, two showgirls, are hurt when they seek financial help from Daisy. On Daisy's wedding night when she is rendered missing, Kay and June decide to look for her to claim the reward.

When a Broadway playboy is found dead, it's up to detective Jim Stevens to pick the murderer out of several likely candidates.

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 like flies. Sherlock Holmes is approached by member James Murphy's widow, who is miffed at being left penniless by her husband. When Captain Pyke is shot, Holmes keys in on his mysterious Chinese widow as well as the shady Merrydew. Other members keep dying: Malcom Dearing first, then Mr. Baker. There is also an attempt on the life of young Eileen Forrester, who became a reluctant society member upon the death of her father. Holmes' uncanny observations and insights are put to the test.

A student of the occult encounters supernatural haunts and local evildoers in a village outside of Paris.

Thirteen women who were schoolmates ask a swami to cast their horoscopes. The news they receive is not good for any of them.

A London nobleman (Lionel Atwill) takes the blame and stands trial after his son strangles a lover (Greta Nissen).

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 city's criminal underworld to find her.

Five men have to prove their innocence when a blackmailer is murdered.

New York schoolmarm Hildegarde Withers assists a detective when a body of unscrupulous stockbroker Gerald Parker suddenly appears in the penguin tank at the aquarium.

Ruth Earlton has come home to her ancestral mansion to claim her inheritance. Accompanied by her boyfriend, she discovers that her father died suddenly under suspicious circumstances. Now it's her turn, as her deranged and relentless uncle targets her for death with the help of his wife and son, plus a very unhappy ape.

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker wants to find the evildoer, among a host of suspects, but it will be difficult since the Wrecker can disguise himself to look like almost anyone

A movie producer offers a nightclub singer a role in his latest film, but all he really wants to do is bed her. She knows, but accepts anyway. Meanwhile, a patron at the club gets a note saying that she'll soon get another note, and that she will be killed ten minutes after that.