A strange animal attack turns a botanist into a bloodthirsty monster.
| Writing | John Colton | Screenplay |
| Directing | Stuart Walker | Director |
| Writing | Robert Harris | Story |
| Production | Robert Harris | Associate Producer |
| Editing | Russell F. Schoengarth | Editor |
| Art | Albert S. D'Agostino | Art Direction |
| Production | Stanley Bergerman | Executive Producer |
| Camera | Charles J. Stumar | Director of Photography |
| Sound | Karl Hajos | Original Music Composer |
| Costume & Make-Up | Jack Pierce | Makeup Artist |
| Camera | Lester Kahn | Grip |
| Production | Muriel Yoemans | Production Secretary |
| Production | Billy Moritz | Production Secretary |
| Editing | Milton Carruth | Editor |
| Lighting | Irving Smith | Lighting Technician |
| Crew | Mary West | Child Wrangler |
| Art | Robert Laszlo | Property Master |
| Writing | Harvey Gates | Adaptation |
| Writing | Edmund Pearson | Writer |
| Costume & Make-Up | Mary Dolor | Hair Setup |
| Costume & Make-Up | Armand Triller | Makeup Artist |
| Directing | Charles S. Gould | Assistant Director |
| Directing | Phil Karlson | Assistant Director |
| Sound | Frank Artman | Boom Operator |
| Sound | Donald Cunliffe | Sound Recordist |
| Sound | Gilbert Kurland | Sound Supervisor |
| Sound | Bob Richards | Sound Mixer |
| Crew | John P. Fulton | Special Effects |
| Crew | David S. Horsley | Special Effects Assistant |
| Crew | George DeNormand | Stunt Double |
| Crew | Eddie Parker | Stunt Double |
| Crew | Harvey Parry | Stunt Double |
| Camera | E. Brown | Grip |
| Camera | A. Buckley | Grip |
| Camera | Maury Gertsman | Camera Operator |
| Camera | John J. Martin | Assistant Camera |
| Editing | Maurice Pivar | Supervising Editor |
| Sound | Gilbert Kurland | Music Supervisor |
| Sound | Karl Hajos | Conductor |
| Sound | Abe Meyer | Music Coordinator |
| Sound | Heinz Roemheld | Music |
| Sound | Clifford Vaughan | Orchestrator |
| Production | Jean Raymond | Script Researcher |
| Crew | Archie Hall | Technical Supervisor |
