Cast & crew
The Unknown Terror (1957)
Directed by Charles Marquis Warren Written by Kenneth Higgins
Cast
| Richard Gilden | Raoul |
| May Wynn | Concha |
| Jim Whitecloud | (uncredited) |
| Gerald Milton | Ramsey |
| Duane Grey | Lino |
| Charles Grey | Wheatley |
| Sir Lancelot | Lancelot |
| Martín Garralaga | Villager |
| Paul Richards | Salt Peter |
| Mala Powers | Gina |
| Patrick O'Moore | Willoughby |
| Foster Hood | (uncredited) |
| John Howard | Eric Matthews |
| William Hamel | Trainor |
| Charles Cirillo | (uncredited) |
| Charles Postal | Higgs |
Crew
| Joseph F. Biroc | Director of Photography |
| Nathan Barragar | Assistant Director |
| Fred W. Berger | Supervising Film Editor |
| Raoul Kraushaar | Original Music Composer |
| Robert O'Dell | Wardrobe Supervisor |
| Vou Lee Giokaris | Wardrobe Supervisor |
| Mike Gordon | Property Master |
| Nathan Barragar | Production Manager |
| Glen Alden | Makeup Artist |
| James W. Sullivan | Art Direction |
| G. W. Bernsten | Set Decoration |
| Louis DeWitt | Special Effects |
| Jack Rabin | Special Effects |
| Pat Whiffing | Hairstylist |
| Charles Marquis Warren | Director |
| Robert Stabler | Producer |
| Kenneth Higgins | Writer |
| Hugh McDonald | Sound |
| Michael Luciano | Editor |