Sukru runs a trading company to front a drug smuggling operation, using carrier pigeons to carry the drugs.

Some conmen convince financial journalist Brownley that leading financier Untermeyer is dead. His report throws the stock market into confusion, allowing the conmen to clear up on the markets. Brownley is then murdered.

An unexploded bomb from World War II is found by a dam, and only the makers will know how to defuse it.

An ex-con deported to Italy after serving a prison sentence in the U.S.A., has invited a group of protection racketeers to join him in Naples.

Duval investigates the death of an illegal immigrant killed after he disembarked from a freighter at New York.

Duval investigates the theft of a valuable old master from the collection of Sir Isaac Spendler.

Duval investigates the disappearance of a valuable antibiotic somewhere between New York and the World Health Organization in Sweden.

Duval investigates the theft of four uncut matched stones from an Angolan diamond mine.

Duval investigates the theft of a cargo of valuable platinum from a flight from Rangoon to Hong Kong after the airplane is forced down by a passenger.

Duval looks into the slave trading racket, investigating the mysterious disappearance of many thousands of natives from Mombasa during the annual pilgrimages to Mecca.

Duval investigates the death of a gang member in Paris and uncovers a murder list.

Author Andrew Slater, writing a book about the war, discovers that Onno van Veer, remembered as a hero of the Dutch resistance, was not executed by the S.S. after all. Duval unearths a tale of treachery and murder.

Duval investigates the theft of a million dollars worth of platinum by three men posing as a U.S. Navy Patrol, who killed the passengers and crew of the S.S. Jensen.

In Montreal for Interpol's annual conference, Duval catches up with a wanted man who escaped his clutches back in 1939.

Gangster Mike Marko amassed a fortune from the rackets, but did not live to spend it. Duval is on the trail of his right-hand man, Pavone.

Ronald Millais is a gigolo, living off women who fall for his easy charm. Duval investigates claims that Millais has kidnapped a millionaire's daughter.

Schroeder was erroneously convicted of the murder of his business partner, Kaltmann. Duval orders that the ex-convict be watched when he hints at committing the crime for which he has already been punished.

A policeman is shot in the back in the opal mining settlement of Cranby's Creek, in the Australian outback, and the townsfolk claim the shooting was carried out by Emil Brock, who is wanted for murder by Interpol.

The driver and hostess of a coach tours company have a profitable sideline carrying out armed robberies in the towns that they visit. Duval investigates the shooting of a Paris jeweler.

Duval flies to Delhi to locate a consignment of live cholera vaccine stolen from a laboratory in Karachi.