Clarence Hyle
John Aldous
Jonas
Narraboth, Captain of the Guard
Professor Nichols (uncredited)
Emperor Maximilian - Prologue
Crown Prince of Germany
The Brother
Emanuel Müller
George Hazelhurst
Blais
Commissionnaire Desmard
Harlan Carr
Joeffrey Vandermuellen
Alexander Vernon
Col. Hendricks (uncredited)
Alec Langley
Robert Busch / Crown Prince
Norton (uncredited)
Lionel Brooks
Colonel Rathbone