 |  19th June 1953 Cinema | |
 | Movies 4 You: More Sci-Fi Classics 3rd September 2013 DVD |
| 19th June 1953 Cinema | |
| Movies 4 You: More Sci-Fi Classics 3rd September 2013 DVD |
 | Prof. Clifford Groves (as Robert Shane) |
 | Dr. Ross Harkness |
 | Ruth Marshall |
 | Nola Mason - Waitress |
 | Celia - Housekeeper (as Jeanette Quinn) |
 | Charlie Webb |
 | Sheriff Andy Andrews |
 | Danny - Townsman |
 | Mr. Wheeler - Hunter |
 | Skeptical Naturalist |
Conference Chairman | |
 | Dr. Fairchild |
 | Stocky Townsman |
 | Tim Newcomb - cattle rancher |
 | Naturalist at Conference |
 | State Police Chief |