The Trygon Factor

London, 1929. Frank Webber, a very busy Scotland Yard detective, seems to be more interested in his work than in Alice White, his girlfriend. Feeling herself ignored, Alice agrees to go out with an elegant and well-mannered artist who invites her to visit his fancy apartment.

Grisly strangulations in London alert Nayland Smith of Scotland Yard to the possibility that fiendish Fu Manchu may not after all be dead, even though Smith witnessed his execution. A killer spray made from Tibetan berries seems to be involved and clues keep leading back to the Thames.

Rival gangsters from Chicago move to London and attempt to extort money from rich Britons.

Buster is a small time crook who pulls a big time job. When he finds that the police will not let the case drop, he goes into hiding and can't contact his wife and child. He arranges to meet them in Mexico where he thinks they can begin again, but finds that he must choose between his family and freedom.

Detective Inspector Jacques Clouseau is borrowed from the Surete on special assignment for Scotland Yard in hopes that a fresh outlook will help the government recover the loot from the Great Train Robbery, which is being used to underwrite a new crime wave. What they don't count on, however, is having more than one Clouseau on the job.

A criminal fleeing a bank robbery has a chance encounter with a banker and his wife and takes a locket with both their pictures in it as a remembrance of the wife's stunning beauty. After enlisting for WWI to escape prosecution, his face is disfigured in combat, and plastic surgeons mistakenly give him the banker's face. As the banker is conveniently MIA, it gives the criminal the opportunity to plan a bank heist from the inside and also to get closer to the banker's wife.

A newlywed fears she's going mad when strange things start happening at the family mansion.

A British psychiatrist devises a devilish revenge plot against his wife's lover.

After an innocent man is executed in a case he was responsible for, a Scotland Yard superintendent finds himself investigating the murder of his key witness.

Sandra Carpenter is a London-based dancer who is distraught to learn that her friend has disappeared. Soon after the disappearance, she's approached by Harley Temple, a police investigator who believes her friend has been murdered by a serial killer who uses personal ads to find his victims. Temple hatches a plan to catch the killer using Sandra as bait, and Sandra agrees to help.

Sherlock Holmes investigates when young women around London turn up murdered, each with a finger severed. Scotland Yard suspects a madman, but Holmes believes the killings to be part of a diabolical plot.