Directed by
| O.A.C. Lund | ||
Writing Credits (in alphabetical order)
| O.A.C. Lund | ... | (scenario) |
| George Scarborough | ... | (story) |
Cast (in credits order)
| Gretchen Hartman | ... | Vera Sabouroff (as Sonia Markova) | |
 |
David Herblin | ... | Jim Harding |
|
|
Frank Goldsmith | ... | Baron Eugene Drako |
| Eric Mayne | ... | Count Alexis Sabouroff | |
| Bradley Barker | ... | Dr. Wu Ching | |
|
|
Helen Long | ... | Wu Soy Fa |
| Stanton Heck | ... | Capt. Nils (as Stanley Heck) | |
|
|
Fred Radcliffe | ... | Capt. Mills (as Fred Ratcliffe) |
|
|
James Alling | ... | Lt. Crosby (as J. Alling) |
Cinematography by
| Joseph Ruttenberg | ||
