A foreign agent is killed while stealing a roll of film in Italy.

Steve accompanies the head of an American plastics company to a conference in France and must guard their top-secret reports.

A foreign aid administrator's death is made to look like suicide.

Berlin.

Steve travels to Morocco to find out who is sabotaging construction plans to enlarge the American section of the French base.

A thief accidentally arms an atomic land mine in Nevada.

Steve travels to Bombay, India to try to clear and rescue from prison an American citizen charged with sabotage.

Undercover agent Steve Mitchell (Brian Donlevy) deals in intrigue.

Killers seek a hidden trove of art in Mexico owned by the Hapsburgs.

Steve travels to Munich to try and break a chain of runners which gathers and leaks vital information from the United States.