Among his research interests were extrasensory perception, psychokinesis, mediumship and poltergeists. During this time he focused mainly on investigating hauntings, poltergeists and mediums. From ghosts that cause chills, and spirits that linger to poltergeists that move things around. Director Bhatt watched a lot footage of true accounts of poltergeists and hauntings. In addition to ghosts and poltergeists, Grosse also investigated numerous claims of precognition. Eveleigh contacts Jane Porter after learning that she had been researching ghosts and poltergeists. Playfair's belief that poltergeists are disembodied, mischievous spirits influenced the paranormal research of Colin Wilson. He was an investigator of 'unusual human experience', e.g. poltergeists and clairvoyants. In 1935, Carrington and Nandor Fodor released a bulletin through the institute titled "Historic Poltergeists". Not believing in poltergeists, the puzzled parents immediately suspect their son. Fourteen teams competed after the withdrawal of the Preston Poltergeists. Sitwell was the author of the book "Poltergeists" (1940). BEL/S defends a network of four places from everything from malware to poltergeists.