A greedy woman tries to poison her nephew's bride in a dark mansion.
Donald Houston
as Dr. Robert Armour
Natasha Parry
as Anne Armour
Patricia Owens
as Willow, Opal's Companion (as Pat Owens)
Esma Cannon
as Aunt Judith Armour
Nora Nicholson
as Aunt Opal Armour
Susan Richmond
as Aunt Hester Armour
Meadows White
as Dexter the Gardener
Melissa Stribling
as Diana Wilson
Ewen Solon
as Sgt. Jenkins
Denis Webb
as Det. Inspector York
Janet Barrow
as Mrs. Wilson
