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 |
| Editing | Alfred Cox | Editor |
| Production | Pat Green | Producer |
| Production | Samuel Z. Arkoff | Executive Producer |
| Art | Colin Southcott | Art Direction |
| Production | James H. Nicholson | Executive Producer |
| Camera | Paul Beeson | Director of Photography |
| Sound | Don Banks | Original Music Composer |
| Writing | Jerry Sohl | Screenplay |
| Sound | Ken Rawkins | Sound Recordist |
| Crew | Wally Veevers | Special Effects |
| Directing | Dennis Hall | Assistant Director |
| Directing | Tilly Day | Continuity |
| Costume & Make-Up | Bobbie Smith | Hairstylist |
| Crew | Ernie Sullivan | Special Effects |
| Camera | Cecil Cooney | Camera Operator |
| Sound | Bob Jones | Sound Recordist |
| Sound | Alban Streeter | Sound Editor |
| Sound | Alan Corder | Sound Editor |
| Costume & Make-Up | Jimmy Evans | Makeup Artist |
| Costume & Make-Up | Laurel Staffell | Wardrobe Designer |
| Writing | H.P. Lovecraft | Short Story |
| Sound | Philip Martell | Music Director |
