Charlie Chan at the Opera

A dangerous amnesiac escapes from an asylum, hides in the opera house, and is suspected of getting revenge on those who tried to murder him 13 years ago.

• 
  H. Bruce Humberstone

• 
  Warner Oland
  Charlie Chan
• 
  Boris Karloff
  Gravelle
• 
  Keye Luke
  Lee Chan
• 
  William Demarest
  Sergeant Kelly
• 
  Guy Usher
  Inspector Regan
• 
  Margaret Irving
  Mme. Lilli Rochelle
• 
  Gregory Gaye
  Enrico Borelli
• 
  Nedda Harrigan
  Mme. Lucretia Borelli
• 
  Frank Conroy
  Mr. Whitely
• 
  Charlotte Henry
  Mlle. Kitty
• 
  Thomas Beck
  Phil Childers
• 
  Maurice Cass
  Mr. Arnold
• 
  Tom McGuire
  Pop Morris - Stage Doorman
• 
  Marc Lawrence
  Undetermined Minor Role (uncredited) (unconfirmed)
• 
  Joan Woodbury
  Dancer in Opera (uncredited)
• 
  William Bailey
  Detective (uncredited)
• 
  Charles Bancroft
  Soldier in Opera (uncredited)
• 
  John Bleifer
  Murdered Orderly (uncredited)
• 
  Stanley Blystone
  Backstage Cop Who Shoots Gravelle (uncredited)
• 
  Myrta Bonillas
  Villager in Opera (uncredited)