A young man visits his fiancé's estate to discover that her wheelchair-bound scientist father has discovered a meteorite that emits mutating radiation rays that have turned the plants in his greenhouse to giants. When his own wife falls victim to this mysterious power, the old man takes it upon himself to destroy the glowing object with disastrous results.
| Directing | Daniel Haller | Director |
| Camera | Paul Beeson | Director of Photography |
| Editing | Alfred Cox | Editor |
| Art | Colin Southcott | Art Direction |
| Sound | Don Banks | Original Music Composer |
| Writing | Jerry Sohl | Screenplay |
| Production | Pat Green | Producer |
| Production | Samuel Z. Arkoff | Executive Producer |
| Production | James H. Nicholson | Executive Producer |
| Directing | Dennis Hall | Assistant Director |
| Camera | Cecil Cooney | Camera Operator |
| Sound | Ken Rawkins | Sound Recordist |
| Sound | Bob Jones | Sound Recordist |
| Sound | Alban Streeter | Sound Editor |
| Sound | Alan Corder | Sound Editor |
| Directing | Tilly Day | Continuity |
| Costume & Make-Up | Jimmy Evans | Makeup Artist |
| Costume & Make-Up | Bobbie Smith | Hairstylist |
| Costume & Make-Up | Laurel Staffell | Wardrobe Designer |
| Crew | Wally Veevers | Special Effects |
| Crew | Ernie Sullivan | Special Effects |
| Writing | H.P. Lovecraft | Short Story |
| Sound | Philip Martell | Music Director |
