Cast 36

1. 

   Warner Oland

   Charlie Chan

2. 

   Boris Karloff

   Gravelle

3. 

   Keye Luke

   Lee Chan

4. 

   William Demarest

   Sergeant Kelly

5. 

   Guy Usher

   Inspector Regan

6. 

   Margaret Irving

   Mme. Lilli Rochelle

7. 

   Gregory Gaye

   Enrico Borelli

8. 

   Nedda Harrigan

   Mme. Lucretia Borelli

9. 

   Frank Conroy

   Mr. Whitely

10. 

    Charlotte Henry

    Mlle. Kitty

11. 

    Thomas Beck

    Phil Childers

12. 

    Maurice Cass

    Mr. Arnold

13. 

    Tom McGuire

    Pop Morris - Stage Doorman

14. 

    Marc Lawrence

    Undetermined Minor Role (uncredited) (unconfirmed)

15. 

    Joan Woodbury

    Dancer in Opera (uncredited)

16. 

    William Bailey

    Detective (uncredited)

17. Charles Bancroft

    Soldier in Opera (uncredited)

18. 

    John Bleifer

    Murdered Orderly (uncredited)

19. 

    Stanley Blystone

    Backstage Cop Who Shoots Gravelle (uncredited)

20. Myrta Bonillas

    Villager in Opera (uncredited)

21. Raymond Brown

    Guard (uncredited)

22. Carita Crawford

    Dancer in Opera (uncredited)

23. Patrick Cunning

    Villager in Opera (uncredited)

24. Zari Elmassian

    Mme. Rochelle (singing voice) (uncredited)

25. Frank Fanning

    Cop (uncredited)

26. 

    Jim Farley

    Detective (uncredited)

27. 

    Adolph Faylauer

    Opera Spectator (uncredited)

28. Larry Fisher

    Cop (uncredited)

29. 

    Benson Fong

    Opera Supernumerary (uncredited)

30. 

    J. C. Fowler

    Opera Spectator (uncredited)

31. 

    Otto Fries

    Innkeeper (uncredited)

32. 

    Bud Geary

    Cop (uncredited)

33. Milton Gowman

    Villager in Opera (uncredited)

34. 

    Herschel Graham

    Villager in Opera (uncredited)

35. Harrison Greene

    Detective (uncredited)

36. 

    Julia Griffith

    Opera Spectator (uncredited)

Crew 8