Claire is de dochter van de bekende uitvinder van de ‘Radiatomic Power Transmitter’, dr. William Forrest. Dr. Forrest is echter verdwenen tijdens een expeditie en Claire vraagt de criminoloog Lance Reardon om haar te helpen met de zoektocht naar haar vermiste vader. Beiden komen er achter, dat de krankzinnige wetenschapper Higgins zich kan transformeren in de duivelse kapitein Mephisto. Mephisto blijkt dr. Forrest ontvoerd te hebben en houdt hem voor losgeld op zijn onherbergzame ‘Mystery Island’ gevangen.
Nee, helaas is Manhunt of Mystery Island nog niet beschikbaar op Netflix in Nederland.
| Crew | Fred Graham | Stunts |
| Crew | Howard Lydecker | Special Effects |
| Directing | Wallace Grissell | Director |
| Writing | Joseph F. Poland | Screenplay |
| Crew | Duke Taylor | Stunts |
| Crew | Dale Van Sickel | Stunts |
| Writing | Jesse Duffy | Screenplay |
| Crew | Duke Green | Stunts |
| Production | Ronald Davidson | Producer |
| Writing | Basil Dickey | Screenplay |
| Writing | Albert DeMond | Screenplay |
| Editing | Harold Minter | Editor |
| Crew | Tom Steele | Stunts |
| Writing | Alan James | Screenplay |
| Crew | Eddie Parker | Stunts |
| Directing | Spencer Gordon Bennet | Director |
| Writing | Grant Nelson | Screenplay |
| Crew | Theodore Lydecker | Special Effects |
| Directing | Yakima Canutt | Director |
| Editing | Cliff Bell Sr. | Editor |
| Crew | Babe DeFreest | Stunts |
| Camera | Bud Thackery | Director of Photography |
| Sound | Mort Glickman | Original Music Composer |
| Art | Charles S. Thompson | Set Decoration |
| Production | R.G. Springsteen | Unit Manager |
| Production | Ronald Davidson | Associate Producer |
| Art | Fred A. Ritter | Art Direction |
| Sound | Ed Borschell | Sound |
| Sound | Richard Cherwin | Music Director |
