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.
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
