A bogus English note is found at a murder venue.
Crooks devise a scheme to transport diamonds by carrier pigeons, agent Tony investigates.
Agent probes racket of crooks promising, for money, to free people's loved ones from behind Iron Curtain.
A French girl is suspect number one when her boyfriend becomes a murder target.
Smith races paid gunman to find a frightened witness to a gangland killing.
Henry Roper is a well respected banker with an impeccable employment record, or at least he was until he decided to steal £100,000 and flee the country for a new life on a tropical island in the South Seas. Hot on his trail is Agent Anthony Smith, who must bring both the money and Roper back to London.
Two strikingly similar disappearances command the attention of the French and English divisions of the Interpol.
Murderer tips off his gang that he is being brought back to England by Agent Smith (Richard Wyler).
Interpol agent Tony Smith (Richard Wyler) poses as a criminal to trap a man who is wanted for a major crime in England.
Target: an international dope-smuggling ring.
A series of murders have one thing in common: all the victims have the same last name.
Wanted: an extortionist who also kills his prey.
The similarity of a Paris murder to one in London makes Smith (Richard Wyler) suspect a British version of "Murder, Inc."
The trail of an ingenious murderer leads Smith to the Middle East.
Smith tries to unveil a smuggling racket.
Smith steps in when a prominent scientist disappears on the morning of a crucial atomic test.
Smith (Richard Wyler) tries to prevent a political assassination.
A society columnist aids Smith's search for a murderer.
A tough secretary stymies Smith's search for a gang of smugglers.
A dead thief's ex-cellmate is Smith's only link to a cache of stolen money.
International intrigue enters the picture as Smith searches for the murderer of a maharajah.
The investigation of a shipboard murder leads Smith (Richard Wyler) to a small village in India.
A missing diplomat's penchant for fishing is Smith's only clue to his whereabouts.
Smith tries to thwart a jewel robbery.
Smith trails a wily diamond thief.
Smith (Richard Wyler) goes undercover to smoke out dope pushers.
The fury of a woman scorned may prove fatal for Smith.
A crook gives Smith the slip in Italy.
Smith (Richard Wyler) searches for an embezzler who tried to elude police by feigning his own death.
A crudely scrawled letter becomes a vital clue in the kidnapping of an ambassador's son.
Smith tries to break up a British version of Murder, Inc.
Smith goes undercover to crack a bootlegging ring.
Death stalks an art gallery where paintings are disappearing, and the curator has been murdered.
Smith (Richard Wyler) slips into Communist territory to recover a vital part of a demolished plane.
Smith (Richard Wyler) tries to snare a fashion-design thief.
Clues are scarce as Smith searches for the murderer of a fellow agent.
A French peasant heads for England in pursuit of his fiancee---who took his money and ran.
When a false passport bearing the name of a missing down and out is confiscated at an international airport, Interpol agent Anthony Smith is called in to solve the mystery. Smith soon discovers that this is not the first jet-setting homeless man to have gone missing, and there has been in fact been a spate of men disappearing from a local halfway house. In order to infiltrate the gang of counterfeiters, Smith disguises himself and takes up residence of the home but he is playing a dangerous game by using himself as bait.
Smith combs a party guest list in search of a thief.