 | Karen Black als Julie / Millicent Larimore / Therese Larimore / Amelia |
 | Robert Burton als Chad Foster |
 | John Karlen als Thomas Amman |
 | George Gaynes als Dr. Chester Ramsey |
 | Jim Storm als Eddie Nells |
 | Kathryn Reynolds als Anne Richards |
| Orin Cannon als Motel Clerk |
 | Gregory Harrison als Arthur Moore |
| Tracy Curtis als Tracy |
| Walker Edmiston als Zuni Fetish Doll (voice) (uncredited) |
| Dan Curtis | Director |
| Richard Matheson | Screenplay |
| Richard Matheson | Story |
| Robert Singer | Associate Producer |
| Paul Lohmann | Director of Photography |
| William F. Nolan | Teleplay |
| Gail Melnick | Casting |
| Les Green | Editor |
| Dan Curtis | Producer |
| Leonard A. Mazzola | Set Decoration |
| Michael Westmore | Makeup Artist |
| Jan Scott | Art Direction |
| Bob Cobert | Original Music Composer |
| Kathryn Blondell | Hairstylist |
| Art Levinson | First Assistant Director |
| Robert J. Koster | Unit Production Manager |
| David McCann | Post Production Supervisor |
| James Pilcher | Sound Mixer |
| Lowell Thomas | Construction Coordinator |
| Richard Albain | Special Effects |
| Erik von Buelow | Other |
| Michael Simpson | Assistant Camera |
| Bob Rose | Key Grip |
| John S. Perry | Costume Supervisor |
| Barbara Siebert | Costumer |
| Lois Kerst | Production Assistant |
| Craig Morse | Production Assistant |
