Mark is the founder of EVP Research Association UK and talks about the theory and drawbacks behind a controversial method of paranormal investigation involving alleged audio recordings of the dead.

Author and 'Conscious Ape' radio show host Jon King on the evidence that suggests Princess Diana's death was due to murder, not accident.

Ufologist Nick Redfern joins Righteous Indignation from Texas to discuss his new title 'Contactees' and how otherwise ordinary people become convinced they have communicated with extra-terrestrial visitors.

Marsh & the Merseyside Skeptics are calling upon pharmacist Boots to withdraw homeopathy products from their shelves. Read on for the open letter they've composed...

Author, lecturer and paranormal investigator Dwayne Claud joins Hayley and Marsh to discuss demonic possession.

Alastair is consultant in the department of medicine and the Tropical & Infectious Disease Unit at Royal Liverpool University Hospital. He talks to Marsh and Hayley on unproven alternative therapies exploited by well meaning or more devious practitioners.

Former Righteous Indignation guest Karl Mamer is host of Canadian podcast The Conspiracy Skeptic. He recently invited Hayley on as a guest to unkindly insult Marsh and Trystan and to talk about the conspiracy surrounding the death (or should that be assassination?) of Princess Diana.