", an interview / featurette included as an extra for the Anchor Bay DVD of the movie "The Entity", is a worthy companion piece to the movie in that it goes into a fair bit of detail on the real-life story behind the book and movie. The interview is with Dr. Barry Taff, a paranormal researcher who'd displayed psychic gifts as a young man and been the subject of a study. Soon, he was doing research himself, under the guidance of a professor named Thelma Moss.