
An international espionage drama following American agent Ken Thurston as dangerous assignments take him across the world, with Herbert Marshall in the title role for most of the series.
Profiles shown here are linked only where the Golden Radio Hour catalog supports the association.
Available dates and episode numbers come from the verified catalog; undated recordings remain in their validated sort order.
In Italy, Ken Thurston investigates a murder tied to a secret formula and a family whose apparent mourning hides dangerous secrets.
A mission to deliver a vital letter in India draws Ken into murder, betrayal, and intrigue inside a maharaja's palace.
The murder of an old friend in New York leads Ken to an international blackmail ring whose reach extends into the Balkans.
Ken races to Buenos Aires to stop a Nazi scheme involving stolen industrial diamonds concealed in a beef shipment.
Inside Nazi Germany, Ken engineers a dangerous double-cross to prevent a senior official from escaping with vital secrets.
A mysterious woman's kiss draws Ken to Paris, where he becomes entangled in an international jewel robbery involving stolen lavaliers.
Sent to a remote island for a supposed vacation, Ken discovers a dangerous conspiracy hidden beneath the peaceful surroundings.
An Antarctic expedition loses a scientist under mysterious circumstances, and Ken discovers murder connected with valuable resources.
A series of explosions and deaths at an oil refinery leads Ken to sabotage and a revenge plot.
A missing ship leads Ken to murder, fraud, and a conspiracy centered on a Puerto Rican plantation and an insurance policy.
Rare postage stamps conceal a scheme to overthrow the government of Libertago, and Ken follows the plot through betrayal.
Investigating a fraudulent land operation in Hawaii, Ken is framed for murder and must clear himself while exposing the swindle.
Ken fakes his death to penetrate a Red Sea piracy and arms-smuggling network built around murder and deception.
Ken fakes his death to penetrate a Red Sea piracy and arms-smuggling network built around murder and deception.
A valuable painting in Rio leads Ken to art forgery, murder, and the criminals profiting from the counterfeit work.
Ken guards a critical radium shipment aboard a flight to Manila while murder and impostors threaten the cargo.
In Lisbon, Ken investigates an international marriage racket whose fraudulent romances have already led to murder.
A smallpox outbreak near the Mexican border leads Ken to a dangerous smuggling operation involving people being moved illegally across the frontier.
In the Himalayan kingdom of Tayh-Ninh, a missing scientist and legend of a priceless throne lead Ken toward murder and a treacherous island.
A stolen nuclear formula falls into the hands of a bumbling intermediary, forcing Ken to retrieve it before international criminals do.
Ken enters Macau's black market to stop Philippine gold from being smuggled illegally through a web of deceptive players.
Suspicious delays and a fatal 'accident' at a crucial Oregon sawmill reveal sabotage and greed behind a vital timber project.
A famous scientist apparently returns under strange circumstances, leading Ken to a plot to steal blueprints for an advanced electronic brain.
Ken races to Algeria to keep a dangerous ancient artifact from being used to ignite a tribal conflict.
In Greece, Ken investigates a black market in a vital medicine, uncovering betrayal and murder.
The killing of a geologist and theft of Arctic expedition reports expose a plan to profit from valuable discoveries.
A mine accident in Tahiti becomes murder and international intrigue when Ken investigates what really happened.
The suspicious death of a colleague leads Ken to a multimillion-dollar canned-meat fraud and black market operation.
A murdered diplomat and illegal arms shipments reveal a plan to spark revolution in a Central American country.
After a Christmas Eve crash landing, Ken joins a mysterious child on an allegorical journey centered on restoring faith in humanity.
Hijacked grain seed in postwar Naples leads Ken to street children and a corrupt official behind the theft.
Stolen supersonic-missile plans and an impostor reveal an international conspiracy that Ken must break.
A mysterious letter and deadly illness surrounding a Bhutan expedition lead Ken to a biological-warfare plot.
Fraud and political manipulation in the Himalayan kingdom of Shalakar place Ken inside a dangerous conspiracy.
A scientist disappears along with radioactive isotopes from a university, and Ken uncovers the scheme behind both losses.
On a cargo ship in the East Indies, Ken tries to identify an international criminal known as the Fish Peddler.
Near the Panama Canal, Ken pursues an arms-smuggling operation and the bandit leader called El Tigre.
Stolen guns discovered in New York send Ken into the African interior after the network moving the weapons.
Ancient silver candlesticks become the key to hidden Nazi loot and a dangerous former agent Ken must stop.
In the Swiss Alps, Ken hunts a master counterfeiter and becomes trapped in murder and deception.