John Lodge

Self

Archduke Franz Ferdinand

Vedad Bey, her husband

Lord Jerry Dansbury

Capt. Harley

Stephen Howard

Inspector Bonnard

Jack Morris

Hugh "Bulldog" Drummond

Pat Heston

George Winter

County Inspector Hanney

Grand Duke Frederick

Jack Sherman

Ronald Cavendish

Count Alexei

Brooke

Other

Joe Gilbert

Roger Hewitt

Dr. Simpson