La morte invisibile
Titolo originale: Mr. Wong, Detective
Un produttore di prodotti chimici viene ucciso subito dopo aver chiesto al detective James Wong di aiutarlo. Il detective Wong decide quindi di indagare su questo e su due successivi omicidi.
Cast
| Attore | Ruolo |
|---|---|
| Boris Karloff | James Lee Wong |
| Grant Withers | Police Capt. Sam Street |
| Maxine Jennings | Myra Ross |
| Evelyn Brent | Olga Petroff / Countess Dubois / Sophie Dome |
| George Lloyd | Devlin |
| Lucien Prival | Anton Mohl |
| John St. Polis | Carl Roemer |
| William Gould | Theodore Meisle |
| Hooper Atchley | Christian Wilk |
| John Hamilton | Simon Dayton |
| Wilbur Mack | Russell |
| Lee Tung Foo | Tchin |
| Lynton Brent | Tommy |
| Grace Wood | Mrs. Roemer |
| Frank Bruno | Lescardi (uncredited) |
| Ed Cassidy | Ambulance Doctor (uncredited) |
| Wheaton Chambers | Chemistry Lab Director (uncredited) |
| Clancy Cooper | Warehouse Man (uncredited) |
| George DeNormand | John (uncredited) |
| Lester Dorr | Coroner (uncredited) |
| Herbert Evans | Wilk's Butler (uncredited) |
| Dick Reinhart | Dock Worker (uncredited) |
Equipaggio
| Ruolo | Nome |
|---|---|
| Screenplay | Houston Branch |
| Producer | Scott R. Dunlap, William T. Lackey |
| Director | William Nigh |