Episode Detail: Hetty Wainthropp Investigates: The Astral Plane - Mystery!
In "Astral Plane," Hetty Wainthropp (Patricia Routledge) poses as a recent widow to investigate a charge that a spiritualist (Kate Layden) is bilking and blackmailing clients. Sara: Tabitha Wady. Amy: Cherith Mellor. Grace Todd: Matyelok Gibbs. Adams: John Graham Davies.