Second serial featuring The Green Hornet and Kato.

June McCarthy has unwittingly aided an undercover Nazi naval officer with acquiring a "mother ship" for German submarines in the Atlantic.

American crime reporter John Jones is reassigned to Europe as a foreign correspondent to cover the imminent war. When he walks into the middle of an assassination and stumbles on a spy ring, he seeks help from a beautiful politician’s daughter and an urbane English journalist to uncover the truth.

An American vacations in Europe with her husband and watches him turn into a Nazi.

Three American soldiers help a young girl deliver a secret message across enemy lines.