 Warner OlandCharlie Chan | Charlie Chan |
 Boris KarloffGravelle | Gravelle |
 Keye LukeLee Chan | Lee Chan |
 William DemarestSergeant Kelly | Sergeant Kelly |
 Guy UsherInspector Regan | Inspector Regan |
 Margaret IrvingMme. Lilli Rochelle | Mme. Lilli Rochelle |
 Gregory GayeEnrico Borelli | Enrico Borelli |
 Nedda HarriganMme. Lucretia Borelli | Mme. Lucretia Borelli |
 Frank ConroyMr. Whitely | Mr. Whitely |
 Charlotte HenryMlle. Kitty | Mlle. Kitty |
 Thomas BeckPhil Childers | Phil Childers |
 Maurice CassMr. Arnold | Mr. Arnold |
 Tom McGuirePop Morris - Stage Doorman | Pop Morris - Stage Doorman |
 Marc LawrenceUndetermined Minor Role (uncredited) (unconfirmed) | Undetermined Minor Role (uncredited) (unconfirmed) |
 Joan WoodburyDancer in Opera (uncredited) | Dancer in Opera (uncredited) |
 William BaileyDetective (uncredited) | Detective (uncredited) |
| CCharles BancroftSoldier in Opera (uncredited) | Soldier in Opera (uncredited) |
 John BleiferMurdered Orderly (uncredited) | Murdered Orderly (uncredited) |
 Stanley BlystoneBackstage Cop Who Shoots Gravelle (uncredited) | Backstage Cop Who Shoots Gravelle (uncredited) |
| MMyrta BonillasVillager in Opera (uncredited) | Villager in Opera (uncredited) |
| RRaymond BrownGuard (uncredited) | Guard (uncredited) |
| CCarita CrawfordDancer in Opera (uncredited) | Dancer in Opera (uncredited) |
| PPatrick CunningVillager in Opera (uncredited) | Villager in Opera (uncredited) |
| ZZari ElmassianMme. Rochelle (singing voice) (uncredited) | Mme. Rochelle (singing voice) (uncredited) |
 Frank FanningCop (uncredited) | Cop (uncredited) |
 Jim FarleyDetective (uncredited) | Detective (uncredited) |
 Adolph FaylauerOpera Spectator (uncredited) | Opera Spectator (uncredited) |
| LLarry FisherCop (uncredited) | Cop (uncredited) |
 Benson FongOpera Supernumerary (uncredited) | Opera Supernumerary (uncredited) |
| JJ. C. FowlerOpera Spectator (uncredited) | Opera Spectator (uncredited) |
