Danny and the team travel back to Canada in the 1870s to investigate the Great Amherst Mystery - one of the most famous and perplexing paranormal cases to come to light during the Golden Age of Spiritualism.

18 year old Esther Cox is the centre of a series of inexplicable, possibly paranormal events - phantom knocking, ghostly messages, and a series of spontaneous fires that start inside the walls of her house.

But is she the victim of a possible paranormal entity, or the mastermind of a devious hoax?

Presented by Danny Robins

Experts: Evelyn Hollow and Dr Ciaran O'KeeffeStory sections by Sarah MorganResearch by Nancy BottomleyFilming and editing by Robb LeechEditing and sound design by Charlie Brandon-KingTheme music by Katherine PriddyTheme co-produced by Jennifer Ann KellerIncidental music by Evelyn SykesCommissioning executive: Paula McDonnellCommissioning editor: Rhian RobertsProduced by Simon Barnard and Victoria LloydA Bafflegab and Uncanny Media production for BBC Radio 4