The owner of a coal mining operation, falsely imprisoned for fratricide, takes a drug to make him invisible, despite its side effect: gradual madness.
| Art | Jack Otterson | Art Direction |
| Costume & Make-Up | Vera West | Costume Design |
| Art | Russell A. Gausman | Set Decoration |
| Directing | Joe May | Director |
| Camera | Milton Krasner | Director of Photography |
| Sound | Hans J. Salter | Original Music Composer |
| Writing | Lester Cole | Screenplay |
| Sound | Frank Skinner | Original Music Composer |
| Writing | Curt Siodmak | Screenplay |
| Writing | Joe May | Story |
| Editing | Frank Gross | Editor |
| Visual Effects | John P. Fulton | Visual Effects |
| Writing | Curt Siodmak | Story |
| Writing | H.G. Wells | Characters |
| Crew | David S. Horsley | Special Effects |
| Sound | Charles Previn | Music Director |
| Crew | Cedric Belfrage | Additional Writing |
| Production | Ken Goldsmith | Associate Producer |
| Directing | Phil Karlson | Assistant Director |
| Art | Martin Obzina | Art Direction |
| Sound | Bernard B. Brown | Sound Supervisor |
| Sound | William Hedgcock | Sound Engineer |
| Visual Effects | Cleo E. Baker | Visual Effects |
