Boris Karloff

Valdar

Margaret Lindsay

Helene von Lorbeer

Bruce Lester

Frank Bennett

Leonard Mudie

James Yeats

Holmes Herbert

Arthur Bennett

William Bailey

British Intelligence Agent

Louise Brien

Miss Risdon - Bennett's Secretary

Glen Cavender

Under Officer Pfalz

Joe De Stefani

German Officer

Lawrence Grant

Brigadier General

Carl Harbaugh

German Soldier

Winifred Harris

Mrs. Maude Bennett

Leyland Hodgson

Lord Sudbury

Stuart Holmes

Luchow - German Soldier

Crauford Kent

Cmdr. Phelps

Morton Lowry

Lt. Borden

Lester Matthews

Henry Thompson

Frank Mayo

Brixton - Intelligence Agent

Paul Panzer

Peasant

John J. Richardson

Cockney Soldier

Ferdinand Schumann-Heink

German Officer

Frederick Vogeding

Baron Kuglar

Leonard Willey

Capt. Stuart

Maris Wrixon

Dorothy Bennett