Directed by
| Larry Buchanan | ||
Writing Credits (in alphabetical order)
| Larry Buchanan | ... | (uncredited) |
| Richard Matheson | ... | (story "Being") (uncredited) |
Cast (in credits order) verified as complete
| Tommy Kirk | ... | Wayne Thomas | |
 |
Shirley Bonne | ... | Leilla Sterns |
| Bill Thurman | ... | Greely / Monster (as Billy Thurman) | |
| Annabelle Weenick | ... | Bella (as Annabelle MacAdams) | |
|
|
Corveth Ousterhouse | ... | Norman Sterns |
| Rest of cast listed alphabetically: | |||
|
|
Larry Buchanan | ... | Narrator (voice) (uncredited) |
Produced by
| Larry Buchanan | ... | producer |
| Edwin Tobolowsky | ... | associate producer |
Cinematography by
| Robert B. Alcott | ... | (as Robert Alcott) |
Editing by
| Larry Buchanan | ||
Sound Department
| Conrad Lee Reed | ... | sound director (as Conrad Lee Redd) |
Special Effects by
| Jack Bennett | ... | special effects |
Additional Crew
| Joreta C. Cherry | ... | production coordinator (as Joreta Cherry) |
| Skip Frazee | ... | paleontology |
