A revolutionary form of psychotherapy designed to rid patients of their phobias yields deadly results when test-subjects begin dying in the same manner as their worst fears. When the Nazis were at the height of power, Adolf Hitler began working with doctors Carl Clauberg and Joseph Mengele to develop a weapon capable of inducing psychosis in enemy combatants. In 1945, Hitler's concentration camps were liberated, and Allied forces were said to have confiscated and destroyed all evidence of the experiments.
Two swimmers attempt to swim across the English Channel but, under cover of fog, one of them is deliberately drowned by her lover after she demands he leave his rich wife for her or she will tell his wife about their affair. Officially, her death is ruled an accident, but her fellow swimmer is convinced that it was not. His swimming coach is initially doubtful, but when he realizes he has been deliberately lied to, he investigates and brings the villain to justice.
Bulldog Drummond's partner Algy is to wed. Bulldog attends the wedding but on his return home in the deep foggy night he wanders into an old mansion of Prince Achmed in search of a telephone. To his shock he finds the corpse of an old man.
When one of the passengers is murdered on a ship during a tropical storm, a man named Samson declares himself to be a police detective from San Francisco takes over the investigation. This is interrupted when the ship is wrecked and the passengers and crew are forced to take shelter on a seemingly deserted island. Further deaths and unexplained events take place before they are rescued by a French ship.
The newlywed country bumpkins from Connecticut, Mr. and Mrs. Horace Jason (John Beal and Wanda McKay), check into the Hotel Clarke in New York City, prepared to spend their first night together as a married couple.
After a job in Monte Carlo, an English jewel theft ring returns to Paris. Suave cat burglar Oliver Lane, fashioned the "Solitaire Man" in the newspapers after seven years of eluding Scotland Yard, proposes marriage to his lovely accomplice Helen and informs her he has bought a country house in Devonshire to which they can all retire. However, unstable Robert Bascom, drug-addicted after his experiences in the Great War, also loves Helen and wants to continue on his own.
The story starts with a prologue set in 1889 in which we see an angry husband murdering his wife's lover. The setting then moves to 1929, just as an antiques dealer Philip Vantine has finished moving into the same house where the 1889 murder occurred. For years the house had one occupant: the butler.
Philo Vance is approached by the head of a publishing company to become an advisor on a series of crime novels they are releasing. Before long he is embroiled in a case about the mysterious killing of one of the partners in the company.
A department store where she works is robbed by Eve Sutton and an accomplice, Carl Briggs. A wristwatch they stole is recognized by Eve's sister Joan, who reports her suspicions to Mrs. Briggs, who is Eve's boss at the store.
When a rich widow is found murdered in her house, her companion Celia, who has vanished, along with the victim's jewellery, is the chief suspect. Inspector Hanaud investigates.
Kinski plays a wealthy, talented young widow who remarries in haste. Suddenly her world is shattered by a series of threatening calls from her new husband's ex-wife. When efforts to stop the woman's assault of terror fails, Kinski is forced to act on her own, uncovering a secret.
A once famous actress dies, and soon afterwards two men mentioned in her diary are found murdered. With their investigation getting nowhere, the police involve amateur detective Pierre Santos, known for his particular powers of observation. Sir George Frame receives a postal warning that he is to be the next victim, and he is indeed murdered.
When millionaire New York City businessman Aaron Lampier receives a death threat in the mail, he sends for his offspring. Ernie Hyams, a newspaper reporter turned lawyer, is dispatched by MacKelvey, his former editor, to track down Lampier's daughter Lorraine. She does not appreciate being dragged away from the nightclub/casino of Frank Penny.
One day in Mexico, magazine photographer Ann Larkin is in a museum when she happens to see a man steal a painting. Pursuing and accusing him, she believes the man, Brod Williams, to be a notorious art thief known only as "The Wildcat." Brod brings the stolen painting to Leon Dumeray, a gallery owner. Dumeray recognizes it as stolen property and notifies the police, who place Brod under arrest.
thumb|thumbtime=5|The Voice of the City (1929) A young man is accused of murder and a master detective is set to track him down and uncover conclusive evidence of his guilt, but the more he works on the case, the more he becomes convinced that the accused is not the real killer. He discovers that the murder was committed by a notorious gangster who's attempting to frame the boy.
A sister and brother check into a posh hotel. Shortly thereafter, the brother is missing, and despite the sister's inquiries, no one admits to ever having seen the man. Meanwhile, a sniper shoots bullets through the window of the room that the brother and sister stayed in.
