The Invisible Man's grandson uses his secret formula to spy on Nazi Germany in this comedy-thriller.
Ilona Massey
as Maria Sorenson
Jon Hall
as Frank Raymond
Peter Lorre
as Baron Ikito
Cedric Hardwicke
as Conrad Stauffer
J. Edward Bromberg
as Karl Heiser
Albert Bassermann
as Arnold Schmidt
John Litel
as John Gardiner
Holmes Herbert
as Sir Alfred Spencer
Keye Luke
as Surgeon
Sven Hugo Borg
as German Captain (uncredited)
John Burton
as R.A.F. Flier (uncredited)
Lane Chandler
as German Sentry (uncredited)