The beautiful Hedy Lamarr's secret agent role was less espionage and more engineering technology. With George Antheil, Lamarr discovered Secret Communications System, today known as spread-spectrum technology. During WW II, the system was designed so the Germans couldn't intercept the signals for Allied torpedoes. Today, it's the basis for Wi-Fi and cellular phones. "In many respects, Lamarr wasn't taken seriously as she was regarded as arm candy--but the woman had brains!" says McCarthy. "She had such a reputation as a screen siren that it worked to her disadvantage in promoting her discovery."