A group of people in an old dark house are terrorized by a mysterious hooded figure dressed in black who proceeds to kill them off one by one.
| Actor | Role |
|---|---|
 Henry KendallReggie Ogden | Reggie Ogden |
 Elizabeth AllanSonia Bryant | Sonia Bryant |
 Felix AylmerSir Richard Bryant | Sir Richard Bryant |
 Jeanne StuartMoya Silverton | Moya Silverton |
 Cyril RaymondJim Silverton | Jim Silverton |
| VViola ComptonMrs. Bascomb | Mrs. Bascomb |
 John TurnbullDetective Inspector Carr | Detective Inspector Carr |
 Ralph TrumanChief Inspector Elliot | Chief Inspector Elliot |
| DDenis CowlesChief Inspector Fleming | Chief Inspector Fleming |
| VVincent HolmanWallis | Wallis |
 James RaglanBeverley Kent | Beverley Kent |
| GGordon BeggWillit | Willit |
 Charles CarsonSir Edward Hulme KC | Sir Edward Hulme KC |