The Waterfront Mata Hari: How a Father-Daughter Spy Team Hunted Ships in New York Harbor

In this episode of Strange Spy Facts, we dive into the shadowy world of Simon Emil Koedel, a naturalized American who became one of Nazi Germany’s most effective agents on U.S. soil. Learn how he turned his adopted daughter Marie into the so-called “Waterfront Mata Hari,” sending her into New York’s seedy bars to seduce sailors and steal shipping secrets. Their pre-war intelligence operation, eventual arrest, and surprising light sentences reveal a forgotten chapter of American vulnerability before Pearl Harbor.