In this dark comedy, a Yankee goes to visit a family of British eccentrics to ask for the hand of one of their daughters in marriage. He soon finds himself in the midst of a really odd family. One of them talks like Bela Lugosi, another believes herself to be a vampire, while a third is locked away in a padded cell. Another family member is thrilled when he finally invents a horseless carriage (50 years after Ford), and the family grandfather is found reading Playboy just before he dies. Trouble begins when members of the family begin to be mysteriously murdered. The American suitor must then discover which member of the strange family is in line to inherit the family fortune.
Unfortunately the movie The Horror of It All is not yet available on Disney Plus.
| Directing | Terence Fisher | Director |
| Writing | Ray Russell | Screenplay |
| Sound | Douglas Gamley | Original Music Composer |
| Production | Margia Dean | Producer |
| Production | Robert L. Lippert | Executive Producer |
| Editing | Robert Winter | Editor |
| Art | Harry White | Art Direction |
| Costume & Make-Up | Bill Lodge | Makeup Artist |
| Costume & Make-Up | Daphne Vollmer | Hairstylist |
| Production | Clifford Parkes | Production Manager |
| Directing | Frank Nesbitt | Assistant Director |
| Sound | George Stephenson | Sound Recordist |
| Camera | Len Harris | Camera Operator |
| Costume & Make-Up | Jean Fairlie | Wardrobe Supervisor |
| Sound | Philip Martell | Conductor |
| Directing | Renée Glynne | Continuity |
| Production | Maureen Newman | Production Accountant |
| Production | Barbara Allen | Production Secretary |
| Camera | Arthur Lavis | Director of Photography |
| Editing | Clive Smith | Assistant Editor |
