A San Francisco airplane bound for South America crashes, and among the scorched debris is found a shrunken native human head, neatly packaged. The perplexed police contact a local anthropology museum about this unclaimed piece of grisly baggage, where they intersect with Jack and Doc, two private eyes, called there to meet a mysterious woman who had a case for them and wanted to meet in private.
Unfortunately the movie The Devil's Mask is not yet available on HBO Max.
| Camera | Henry Freulich | Director of Photography |
| Directing | Henry Levin | Director |
| Writing | Charles O'Neal | Screenplay |
| Crew | Dwight V. Babcock | Additional Dialogue |
| Crew | Carlton E. Morse | Radio Play |
| Directing | Carl Hiecke | Assistant Director |
| Sound | Mischa Bakaleinikoff | Music Director |
| Art | George Montgomery | Set Decoration |
| Editing | Jerome Thoms | Editor |
| Art | Robert Peterson | Art Direction |
