Elenco - Invisible Enemy
Alan Marshal
Jeffrey Clavering
Tala Birell
Sandra Kamarov
Mady Correll
Princess Stephanie
C. Henry Gordon
Nikolai Kamarov
Herbert Mundin
Sergeant Alfred M. Higgs
Gerald Oliver Smith
Bassett
Ivan F. Simpson
Michael (as Ivan Simpson)
Elsa Buchanan
Sophia
Dwight Frye
Alex
Leonard Willey
Sir Herbert DonbridgeIan Maclaren
Sir Joshua Longstreet
Egon Brecher
Kirman
Frank Puglia
Signor Bramucci
Sidney Bracey
Kamarov's Butler
Lawrence Grant
Foreign DiplomatKeith Hitchcock
Secondary Supporting Role
Paul Sutton
Chauffeur
Wilhelm von Brincken
Foreign Diplomat