John Lodge

as Archduke Franz Ferdinand

as Lord Jerry Dansbury

as Vedad Bey, her husband

as Stephen Howard

as Capt. Harley

as Inspector Bonnard

as Hugh "Bulldog" Drummond

as Jack Morris

as County Inspector Hanney

as Pat Heston

as George Winter

as Grand Duke Frederick

as Jack Sherman

as Count Alexei

as Ronald Cavendish

as Dr. Simpson

as Brooke

as Roger Hewitt

as Joe Gilbert

as Self