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.
Charlie Chan
Gravelle
Lee Chan
Sergeant Kelly
Inspector Regan
Mme. Lilli Rochelle
Enrico Borelli
Mme. Lucretia Borelli
Mr. Whitely
Mlle. Kitty
Phil Childers
Mr. Arnold
Pop Morris - Stage Doorman
Undetermined Minor Role (uncredited) (unconfirmed)
Dancer in Opera (uncredited)
Detective (uncredited)
Soldier in Opera (uncredited)
Murdered Orderly (uncredited)
Backstage Cop Who Shoots Gravelle (uncredited)
Villager in Opera (uncredited)
Guard (uncredited)
Mme. Rochelle (singing voice) (uncredited)
