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

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 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.

A man extorts a large sum of money from an insurance company. Interpol begin a tireless operation to track the man through countries that don't have Interpol agreements.

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.

Duval goes to Madrid on the trail of a young couple who have robbed a Tel Aviv bank, using the female's threat to commit suicide as a diversionary tactic.

The value of paintings by Hugo Ballard begins to soar after his death, so why would his widow slash one of his paintings?

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.

Interpol is called in when the police find the body of a French girl in the boot of an American car. Everything points to Ben Stack as the murderer, but Duval is not convinced.

Duval is on the trail of Thackeray, an international forger who robs safes and substitutes forged bills for the real thing.

Duval is asked to investigate a gun-running racket in North Africa, and suspects archaeologist Professor Velard of involvement.