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Directed by | |||
| H. Bruce Humberstone | |||
Writing credits(in alphabetical order) | ||
| Charles Belden | writer (as Charles S. Belden) | |
| Scott Darling | writer | |
| Bess Meredyth | story | |
| 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 | |
| Frank Conroy | ... | Mr. Whitely | |
| Charlotte Henry | ... | Kitty Rochelle | |
| Thomas Beck | ... | Phil Childers | |
| Maurice Cass | ... | Mr. Arnold | |
| Tom McGuire | ... | Pop Morris - Stage Doorman | |
| rest of cast listed alphabetically: | |||
| William Bailey | ... | Detective (uncredited) | |
| Charles Bancroft | ... | Soldier in Opera (uncredited) | |
| John Bleifer | ... | Murdered Orderly (uncredited) | |
| Stanley Blystone | ... | Backstage Cop (shoots Gravelle) (uncredited) | |
| Myrna Bonillas | ... | Villager in Opera (uncredited) | |
| Raymond Brown | ... | Guard (uncredited) | |
| Carita Crawford | ... | Dancer in Opera (uncredited) | |
| Patrick Cunning | ... | Villager in Opera (uncredited) | |
| Zari Elmassian | ... | Mme. Rochelle (uncredited) (singing voice) | |
| Jim Farley | ... | Detective (uncredited) | |
| Larry Fisher | ... | Cop (uncredited) | |
| Benson Fong | ... | Opera Supernumerary (uncredited) | |
| Otto Fries | ... | Innkeeper (uncredited) | |
| Bud Geary | ... | Cop (uncredited) | |
| Milton Gowman | ... | Villager in Opera (uncredited) | |
| Herschel Graham | ... | Villager in Opera (uncredited) | |
| Harrison Greene | ... | Detective (uncredited) | |
| Cliff Herd | ... | Stagehand (uncredited) | |
| Charles Anthony Hughes | ... | Ambulance Doctor (uncredited) | |
| Selmer Jackson | ... | Hudson, wire-photo technician (uncredited) | |
| Gladden James | ... | Regan's Secretary (uncredited) | |
| Jane Keckley | ... | 2nd Wardrobe Woman (uncredited) | |
| Fred Kelsey | ... | Dugan, Policeman (uncredited) | |
| Marc Lawrence | ... | Undetermined Minor Role (uncredited) (unconfirmed) | |
| Leonard Mellon | ... | Villager in Opera (uncredited) | |
| Tony Merlo | ... | Villager in Opera (uncredited) | |
| Dodo Newton | ... | Barmaid in Opera (uncredited) | |
| Eddie Parker | ... | Cop (uncredited) | |
| Richard Powell | ... | Cop (uncredited) | |
| Enrique de Rosas | ... | Florist (uncredited) | |
| Tony Roux | ... | Villager in Opera (uncredited) | |
| Dick Rush | ... | Detective (uncredited) | |
| Eddie Shubert | ... | Guard (uncredited) | |
| Lee Shumway | ... | Sanatarium Guard (uncredited) | |
| Mary Louise Smith | ... | Villager in Opera (uncredited) | |
| Harry Strang | ... | Cop (uncredited) | |
| Eddie Tamblyn | ... | Call Boy (uncredited) | |
| Marjorie Timm | ... | Villager in Opera (uncredited) | |
| Harland Tucker | ... | Private Detective (uncredited) | |
| Hilda Vaughn | ... | Agnes - Wardrobe Woman (uncredited) | |
| Emmett Vogan | ... | Smitty, Wire-photo Technician (uncredited) | |
| Billy Wayne | ... | Electrician (uncredited) | |
| Tudor Williams | ... | Gravelle's Singing Voice (uncredited) (voice) | |
| Joan Woodbury | ... | Dancer in Opera (uncredited) | |
Produced by | |||
| John Stone | .... | associate producer | |
Original Music by | |||
| Charles Maxwell | (uncredited) | ||
Cinematography by | |||
| Lucien N. Andriot | |||
Film Editing by | |||
| Alex Troffey | |||
Art Direction by | |||
| Duncan Cramer | |||
| Lewis H. Creber | |||
Costume Design by | |||
| Herschel McCoy | (as Herschel) | ||
Second Unit Director or Assistant Director | |||
| Sol Michaels | .... | assistant director | |
Sound Department | |||
| Harry M. Leonard | .... | sound | |
| George Leverett | .... | sound | |
Costume and Wardrobe Department | |||
| Sam Benson | .... | wardrobe (uncredited) | |
Music Department | |||
| Samuel Kaylin | .... | musical director | |
| Charles Maxwell | .... | orchestrator | |
Other crew | |||
| Earl Derr Biggers | .... | character | |
| William Kernell | .... | libretto | |
| Company credits | Box office and business | Technical specifications |
| Soundtrack listing | Main details |