A Nazi spy ring is after a chemical formula that increases the power of ordinary gasoline for U.S. Army aviation use. Two U.S. chemical companies are developing the formula, with each working on half for security purposes. The spies get … Michael Whalen, Anne Nagel, William Bakewell, Constance Worth, Hans Heinrich von Twardowski, Jack Mulhall, George Pembroke Added on Amazon Prime 2023-02-06.