To some, Satanism is a religion as valid as Christianity - to others it’s a dangerous cult. With thousands of devotees and popularity rising, it's time to unearth its origins, tales and beliefs. Is there a darker side to the ancient ritual Black Mass? Cast List: Jamie Theakston: Investigative reporter Gavin Baddeley: Church Of Satan, UK Jack Orr: Local guide at Hellfire Caves, West Wycombe Rev. Lionel Fanthorpe: Author ‘Mysteries & Secrets of Time’ Andrew Gough: Writer, presenter and editor of The Heretic Magazine  Ross Andrews: Author & Historian Richard Felix: A historian and lecturer specialising in local and paranormal history Heather Osborn: Author & Historian Edward Dashwood: Baronet, West Wycombe Estate Aron Paramor: Occult Researcher Eric Meyers: Narrator Learn more about your ad choices. Visit megaphone.fm/adchoices