- Unknown:
- Francis Dur
- Unknown:
- David Kean.
- Music By:
- Augustus Franzel.
- Produced By:
- Archie Campbell
- Conducted By:
- Frank Cantell.
- Unknown:
- Augustus Franzel
- Sir Charles Fanshaw:
- Griffith Jones
- Colonel Michael Rostard:
- Albert Lieven
- General Rostard:
- Frederick Valk
- Baron Clemesco:
- Bernard Rebel
- Count von Falkenstein:
- Friedrich Richter
- Countess Therese von Falkenstein:
- Irene Prador
- Joseph D Miller:
- Charles Farrell
- Madame Anna Vaskya:
- Gwen Catley
- A singer:
- Robert Irwin
- Paul:
- Olaf Olsen
- Benson:
- Jack Williams
- Inspector Davis:
- Johnnie Schofield
- President of an International Conference:
- John Clifford
- Interpreter:
- George de Warfaz
- Two guests:
- Ann Codrington
- Two guests:
- Thea Wells
