Charlie Chan at the Opera Twentieth Century-Fox Film Corporation (1936) Starring Warner Oland Directed by H. Bruce Humberstone Gravelle, a former baritone believed dead after an opera house fire seven years before, has been confined in a mental institution, suffering from amnesia. His memory, rekindled when sees a news story about his former wife's current appearance in an opera in Los Angeles, escapes and seeks revenge for the failed attempt on his life years earlier. When those involved in the crime are found stabbed to death, Charlie Chan and son Lee try to find out if the fugitive Gravelle is the one responsible.
