A husband and wife detective team takes on the search for a missing inventor and almost get killed for their efforts.

An undercover cop infiltrates a powerful New York based crime syndicate.

Chan, in Paris for a reunion with friends from World War I, becomes involved in investigating the murder of a munitions manufacturer who was supplying arms to the enemy, even as the rising clouds of World War II force the city into nightly blackout status..

A newspaperman Paul Cluett (Jack Holt) gets rival reporter Linda Lawrence (Mae Clark) to admit that she is investigating a story in Morocco that guns are being smuggled illegally.

Former bootlegger Remy Marco has a slight problem with foreclosing bankers, a prospective son-in-law, and four hard-to-explain corpses.

The Japanese detective rounds up a league of assassins for Scotland Yard.

Brothers Beau, John and Digby Geste join the Foreign Legion, where they fall under the rule of tyrannical Sergeant Markoff. Beau and John are assigned to Fort Zinderneuf, where Markoff tries to break their spirit, aware of a dark family secret concerning a fabulous jewel one of them carries. As tensions rise, Arabs attack the fort and rivalries must be thrown aside in a desperate battle for life.

Returning from European exile where she avoided testifying against her criminal associates, a former singer with a tell-all diary is murdered to insure her silence.

Although Charlie and Lee are in Monaco for an art exhibit, they become caught up in a feud between rival financiers which involves the Chan's in a web of blackmail and murder.

In Rio de Janiero to arrest a nightclub singer on suspicion of a murder in Hawaii, Charlie Chan becomes involved with the Rio police in solving the singer's own murder.