Directed by
| Fred Guiol | ||
Writing Credits
| Mitch Lindemann | ... | (original screenplay) |
Cast (in credits order)
| Robert Cummings | ... | Don Sherlock Holmes | |
| Julie Bishop | ... | Julie Bishop | |
| Chick Chandler | ... | Conrad | |
| Laurette Luez | ... | Marguerite Garcia | |
| Anthony Warde | ... | Frederick the Butler / AKA El Diablo (as Tony Warde) | |
 |
Rosa Rey | ... | Donna Maria Garcia (as Rosa Ray) |
| David Leonard | ... | Don Pedro Garcia | |
| Fortunio Bonanova | ... | Don Fernando Garcia | |
|
|
Earl Lee | ... | Andrew Semple |
Produced by
| Don Sharpe | ... | producer |
Cinematography by
| George E. Diskant | ... | (as George Diskant) |
Editing by
| Jodie Copelan | ||
Art Direction by
| Ralph Berger | ||
Production Management
| Ruby Rosenberg | ... | production supervisor |
Second Unit Director or Assistant Director
| Sam Ruman | ... | assistant director |
Music Department
| Leon Klatzkin | ... | music supervisor |