A husband and wife detective team takes on the search for a missing inventor and almost get killed for their efforts.
| Writing | Dashiell Hammett | Novel |
| Art | Edwin B. Willis | Assistant Art Director |
| Writing | Albert Hackett | Screenplay |
| Costume & Make-Up | Dolly Tree | Costume Design |
| Art | David Townsend | Assistant Art Director |
| Editing | Robert Kern | Editor |
| Camera | James Wong Howe | Director of Photography |
| Art | Cedric Gibbons | Art Direction |
| Writing | Frances Goodrich | Screenplay |
| Camera | Ted Allen | Still Photographer |
| Directing | W.S. Van Dyke | Director |
| Crew | Howard Dietz | Public Relations |
| Sound | Wayne Allen | Orchestrator |
| Directing | Lesley Selander | Assistant Director |
| Sound | David Snell | Orchestrator |
| Sound | Jack Virgil | Orchestrator |
| Sound | Maurice De Packh | Orchestrator |
| Sound | William Axt | Original Music Composer |
| Production | Hunt Stromberg | Producer |
| Sound | Douglas Shearer | Sound Director |
| Camera | Clarence Sinclair Bull | Still Photographer |
