A Man investigates the disappearance of two of his friends who were the guests of a sinister Austrian count.
| Production | William Alland | Producer |
| Writing | Jerry Sackheim | Screenplay |
| Directing | Nathan H. Juran | Director |
| Writing | Jerry Sackheim | Story |
| Camera | Irving Glassberg | Director of Photography |
| Editing | Russell F. Schoengarth | Editor |
| Art | Bernard Herzbrun | Art Direction |
| Art | Alfred Sweeney | Art Direction |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Sound | Joseph Gershenson | Music Director |
| Art | Oliver Emert | Set Decoration |
| Art | Russell A. Gausman | Set Decoration |
| Sound | William Lava | Music |
| Sound | Hans J. Salter | Music |
| Sound | Paul Sawtell | Music |
| Sound | Frank Skinner | Music |
| Sound | Paul Dessau | Music |
| Sound | Charles Previn | Music |
| Sound | Milton Rosen | Music |
| Costume & Make-Up | Ray Romero | Makeup Artist |
| Sound | Leslie I. Carey | Sound |
| Sound | Joe Lapis | Sound |
| Visual Effects | David S. Horsley | Visual Effects |
| Directing | William Holland | Assistant Director |
