Richard Bruce, an American in fog bound London stumbles into the midst of international intrigue, with Rose Thorne, an innocent dupe. Together they try to unravel the mystery, enlisting the aid of a cat burglar named Holmes, who they bump into along the way.
| Writing | Ruth Rose | Writer |
| Directing | Ernest B. Schoedsack | Director |
| Crew | Robert Benchley | Additional Dialogue |
| Costume & Make-Up | Walter Plunkett | Costume Design |
| Editing | Ted Cheesman | Editor |
| Production | Merian C. Cooper | Executive Producer |
| Camera | Henry W. Gerrard | Director of Photography |
| Sound | Roy Webb | Original Music Composer |
| Directing | Ivan Thomas | Assistant Director |
| Art | Van Nest Polglase | Settings |
| Production | David Lewis | Associate Producer |
| Sound | Hal Bumbaugh | Sound Recordist |
| Art | Alfred Herman | Settings |
| Sound | Max Steiner | Music Director |
| Camera | Ollie Sigurdson | Still Photographer |
| Camera | Tom Clement | Grip |
