Ilona Massey, Jon Hall, Peter Lorre, Cedric Hardwicke, J. Edward Bromberg, Albert Bassermann, John Litel, Holmes Herbert, Keye Luke, Sven Hugo Borg, John Burton, Lane Chandler, Mabel Colcord, James Craven, Donald Curtis
The Invisible Man's grandson uses his secret formula to spy on Nazi Germany in this comedy-thriller.