Steve travels to Africa to locate two missing agents who were sent there to find the secret breeding grounds of a powerful germ culture.

Steve travels to Portugal to help a friend and colleague investigate a political refugee scam that smuggles aliens into the United States.

Steve investigates an organization of professors who lecture and find the one who is running secrets from the United States to Europe.

Steve travels to the Middle East to prove that the United States has nothing to do with the assassination of the king.

Steve travels to Panama to find who has been stealing large quantities of dynamite.

Steve investigates the disappearance of documents.

Steve travels to Barcelona to retrieve records of top-secret conversations from a European diplomat who has disappeared.

Steve travels to Singapore to find rubber worth $1 million stolen from the United States.

Steve travels to the Balkans and poses as a journalist so he can secretly meet with a delegate from one of the Balkan countries.

Steve's mission is to find out who is smuggling guns and other contraband into China.