Stanley Van Beers

Forbes

Inspector Castaing

British colonel

Benedict

Maurice Hurry

Mario

Commissaire

Apothecary

Colonel Sapt

Mayor Kuo

Chauvelin

Ludwig Reichenheim (uncredited)

Sir David Pye, C.B., F.R.S.

Harry

General

Cartwright

Mr. Lovegrove

Professor Perronet

Judge (uncredited)

Calvert

Earl of Broadstairs