Directed by
| Hamilton MacFadden | ||
Writing Credits (in alphabetical order)
| Vivian Crosby | ... | (story) |
| Howard J. Green | ... | (writer) |
| Harry Wagstaff Gribble | ... | (story) |
| Shirley Warde | ... | (story) |
Cast (in credits order) verified as complete
| Ralph Morgan | ... | Azrah | |
| Victor Jory | ... | La Tour | |
| Sally Blane | ... | Constance Russell | |
| Tom Dugan | ... | Albert Young | |
| Luis Alberni | ... | Metzger | |
| Edward Van Sloan | ... | John Russell (as Ed. Van Sloan) | |
| Willard Robertson | ... | Dr. Frank Fitzgerald | |
| Dorothy Appleby | ... | Maisie Henry | |
| Boothe Howard | ... | Detective Lt. Jed Dobson | |
 |
Phillip Trent | ... | David Adams (as Clifford Jones) |
| Rest of cast listed alphabetically: | |||
| Herbert Bunston | ... | Professor King (uncredited) | |
| James P. Burtis | ... | Sergeant Lombard (uncredited) | |
| Allan Cavan | ... | Detective (uncredited) | |
| Harry Cording | ... | Dredger (uncredited) | |
| Clarence Geldert | ... | Doctor (uncredited) | |
| John George | ... | Dwarf (uncredited) | |
|
|
James B. Leong | ... | Chinese Henchman (uncredited) |
| Pat Moriarity | ... | Man Getting Massage (uncredited) | |
|
|
Adrian Morris | ... | Boldy (uncredited) |
| Hal Price | ... | Dredger (uncredited) | |
Music by
| R.H. Bassett | ... | (uncredited) |
Cinematography by
| L. William O'Connell | ||
Editing by
| Robert Bischoff | ... | (uncredited) |
Casting By
| Phil M. Friedman | ... | (uncredited) |
Art Direction by
| Duncan Cramer | ||
Second Unit Director or Assistant Director
| George Blair | ... | assistant director (uncredited) |
Sound Department
| Albert Protzman | ... | sound recordist |
Casting Department
| Robert Mayo | ... | casting assistant (uncredited) |
Costume and Wardrobe Department
| William Lambert | ... | wardrobe |
Music Department
| Samuel Kaylin | ... | musical director / composer: additional music (uncredited) |
Additional Crew
| William Cameron Menzies | ... | technical effects |
