Corporal Larry Grant and Sergeant "Mac" McGowan, of the United States Marine Corps, are rival for the love of Frances Schiller, but team up to hunt down "The Tiger Shark," a mad, scientific wizard who is holding Sergeant William Schiller, Frances' brother, a prisoner on a wild, jungle island in the Pacific.
| Directing | B. Reeves Eason | Director |
| Directing | Joseph Kane | Director |
| Production | Maxwell Arnow | Casting Director |
| Writing | Wallace MacDonald | Story |
| Writing | Maurice Geraghty | Story |
| Writing | Ray Trampe | Story |
| Writing | Sherman L. Lowe | Screenplay |
| Writing | Barney A. Sarecky | Screenplay |
