Intelligence has uncovered a plot to assassinate the American delegate to the International Peace Conference, but the delegate won't change his plans and insists on attending the conference and making his speech.

A famous music promoter, Paul Simoneff, is suspected of being the mastermind behind a an enemy agency. Maj. Morgan is assigned to France to recruit famous pianist Helene Van Loon to participate in a dangerous mission to expose Simoneff.

The most heavily guarded US atomic secrets have been leaked to terrorists. Maj. Morgan must locate them and stop them from building a nuclear-powered aircraft, the "Firebird", before they can use it against the US.

Maj. Morgan is sent to Amsterdam to interrogate an international gangster who was caught at the airport using a forged American passport.

Morgan teams up with an Awol American soldier to foil a Soviet plot to bomb an American troop train.

In occupied Paris, Morgan impersonates an anti-British Irishman in an effort to steal British invasion plans from the Nazis. He is aided by a Can-Can dancer working for the French Resistance.

Counterfeit American 20's are being smuggled from Copenhagen into West Germany, so Morgan is in Copenhagen to find the source with assistance from Danish police.

Morgan is tipped off about an imminent putsch in Austria. He is initially skeptical of his informant, but when the informant is found floating in the Danube, Morgan begins to take the threat more seriously.

A fatherless German boy wanders into the communist area and taken captive. Sgt. Morgan enters East Germany to return Hansel to his mother but needs the aid of people like Maria who's willing to risk her life to help.

The Near Eastern Oil Company is not making its scheduled deliveries to the Allies. Major Morgan is sent to Istrahan to investigate.

General Navik is defecting to the U.S. During a stopover in the U.K., Major Morgan assists British MI5 with security for Navik, who is traveling incognito. However, his ailing wife and Morgan's lack of sleep threaten to blow his cover.

Morgan's mission is to find out the location of a Nazi bacteriological bomb facility.

A woman contacts Morgan when her physicist husband vanishes, leaving cryptic instructions about meeting her in Stockholm. Morgan is concerned because he knows her husband was working on an important new missile guidance system.

Holland 1943. Morgan is sent to help the Dutch Underground find and destroy a list of 3000 innocents who are to be arrested and sent to the concentration camps.