In a spooky mansion, one of three sinister spinsters tries to poison her nephew's wife to steal a large inheritance.
| Actor | Role |
|---|---|
 Donald HoustonDr. Robert Armour | Dr. Robert Armour |
 Natasha ParryAnne Armour | Anne Armour |
 Patricia OwensWillow, Opal's Companion (as Pat Owens) | Willow, Opal's Companion (as Pat Owens) |
 Esma CannonAunt Judith Armour | Aunt Judith Armour |
 Nora NicholsonAunt Opal Armour | Aunt Opal Armour |
| SSusan RichmondAunt Hester Armour | Aunt Hester Armour |
 Meadows WhiteDexter the Gardener | Dexter the Gardener |
 Melissa StriblingDiana Wilson | Diana Wilson |
 Ewen SolonSgt. Jenkins | Sgt. Jenkins |
| DDenis WebbDet. Inspector York | Det. Inspector York |
| JJanet BarrowMrs. Wilson | Mrs. Wilson |