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Refugees on a ship bound for a new home are terrorized by a saboteur.
Steve must smash a spy ring that transmits top secret information the old-fashioned way--by word of mouth.
In Stockholm, a child is kidnapped in order to prevent his father from exposing an espionage ring.
Steve must risk his life in the Swiss Alps to recover a document that proves a country's recently deceased leader was murdered.
Steve travels to Bombay in order to clear a jailed American citizen of sabotage charges.
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Steve's assignment this time is to travel to Rome in order to recover vital film footage stolen from a movie company.
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Steve is sent to Burma to investigate the murder of a newspaperman who was posing as a political refugee.
It's Steve to the rescue when an American citizen is accused of murdering the head of a South American political party.
Steve must discover whether or not an old galpal, who's now an enemy agent, is behind acts of sabotage in Japan.
In Barcelona, Steve tries to retrieve a taped conversation of a European diplomat who has disappeared.
Steve must stop a saboteur's attack on a conference in Paris between Western and Eastern bloc nations.
Steve tries to find out the connection between the murder of a well-known foreign agent and the theft of a Civil War map.
Steve tries to determine the connection between a piece of string found on a corpse and the theft of dynamite in Panama.
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In the Balkans, Steve must locate a murdered general's secret documents before enemy agents can get their hands on them.
Steve parachutes into Eastern Europe to search for a witness who can clear the United States of an international frame.
Steve discovers a Commie spy ring operating out of the sewers of Paris.
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In Paris, Steve's only clue to the identity of an assassin is a bowl of cold stew.
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Steve travels to Macao and poses as a crook to stop a counterfeiting ring that's flooding the Far East with phony United States currency.
Steve is sent to Singapore to recover a million dollars worth of rubber that was stolen from the United States.
Steve must protect an Italian journalist with information about Mafia activity in an election on the newsman's flight back to Italy.
An American businessman is framed for assassinating the King of Transjordan. Steve travels to the country to prove that other elements were responsible for the killing.
Steve uses a decoy to smuggle a U.S. diplomat out of Eastern Europe.
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Steve is sent to South America to expose a plot against the United States.
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In Berlin, Steve is on the trail of two masked men who swiped a valuable briefcase containing confidential documents from a diplomatic courier.
Steve poses as an agitator in Transjordan to stop a fanatic bent on starting a revolt against his government.
After a murder in Rome, Steve discovers that someone has been impersonating him.
Steve gets smuggled into a slave labor camp to get vital information but then finds that it's going to be a lot harder getting out.
Steve negotiates the dangerous back alleys of Havana in search of a spy in possession of stolen documents on microfilm.
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