The relatives of a recently deceased man gather at his eerie mansion but before his will can be read, they start being murdered one by one.
Unfortunately the movie Castle of Evil is not yet available on HBO Max.
| Camera | Brick Marquard | Director of Photography |
| Art | Harry Reif | Set Decoration |
| Production | Earle Lyon | Producer |
| Art | Paul Sylos | Art Direction |
| Directing | Francis D. Lyon | Director |
| Sound | Paul Dunlap | Original Music Composer |
| Writing | Charles A. Wallace | Screenplay |
| Production | Jasper Russel | Casting |
| Production | Wendell E. Niles Jr. | Associate Producer |
| Costume & Make-Up | Robert Dawn | Makeup Artist |
| Costume & Make-Up | Linda Trainoff | Hairstylist |
| Crew | Roger George | Special Effects |
| Production | Joe Wonder | Production Manager |
| Production | Fred Jordan | Executive Producer |
| Production | Kerwin Coughlin | Casting |
| Editing | Robert S. Eisen | Supervising Editor |
