The wicked Alain plots an elaborate revenge against his younger brother Edmund, leading to a deadly confrontation in his dungeon deathtrap.
| Writing | Robert Louis Stevenson | Story |
| Writing | Jerry Sackheim | Screenplay |
| Directing | Joseph Pevney | Director |
| Art | Robert Laszlo | Props |
| Production | Ted Richmond | Producer |
| Camera | Irving Glassberg | Director of Photography |
| Editing | Edward Curtiss | Editor |
| Art | Bernard Herzbrun | Art Direction |
| Art | Eric Orbom | Art Direction |
| Art | Russell A. Gausman | Set Decoration |
| Art | Julia Heron | Set Decoration |
| Costume & Make-Up | Rosemary Odell | Costume Design |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Sound | Joseph Gershenson | Music Director |
| Sound | Hans J. Salter | Music |
| Sound | William Lava | Music |
| Sound | Frank Skinner | Music |
| Sound | Herman Stein | Music |
| Sound | Miklós Rózsa | Music |
| Art | Nathan H. Juran | Art Direction |
| Sound | Glenn E. Anderson | Sound |
| Sound | Leslie I. Carey | Sound |
