Author/explorer John W. Vandercook conceived the character of Bertram Lynch as an investigator for the League of Nations. He is Trinidad's Port o' Spain trying to track down the leader of a gang of diamond smugglers. A trail, littered with murders, leads him to a crocodile-infested swamp.
| Production | Sol M. Wurtzel | Producer |
| Editing | Alfred DeGaetano | Editor |
| Writing | Seton I. Miller | Writer |
| Costume & Make-Up | Royer | Costume Design |
| Writing | John W. Vandercook | Novel |
| Crew | Bud Geary | Stunts |
| Directing | Louis King | Director |
| Sound | Samuel Kaylin | Music Director |
| Camera | Barney McGill | Director of Photography |