Frank Raymond, grandson of the original Invisible Man, uses his family's secret chemical formula to become invisible and volunteer as an Allied spy following the attack on Pearl Harbor. He infiltrates Nazi Germany to outwit Axis agents, recover a stolen spy list, and thwart a planned aerial attack on New York City.

Ilona Masseyas Maria Sorenson
Jon Hallas Frank Raymond
Peter Lorreas Baron Ikito
Cedric Hardwickeas Conrad Stauffer
J. Edward Brombergas Karl Heiser
Albert Bassermannas Arnold Schmidt
John Litelas John Gardiner
Holmes Herbertas Sir Alfred Spencer
Keye Lukeas Surgeon
Sven Hugo Borgas German Captain (uncredited)