French investigator of mediums (1865-1924) remembered for his controversial attempts to provide proof of ectoplasm in the form of plaster moulds. 

Seventeenth century clergyman (1636-1680) and member of the Royal Society, one of the first intellectuals to take a scientific interest in paranormal claims.

British psychical researcher (1895-1992) noted for contributions to the critical literature on hauntings and physical mediumship.

British philosopher and psychologist (b 1935) who has published extensively on lucid dreams, ESP and the out-of-body experience.

German-born linguist and psychical researcher living in Britain (1925-1984) who investigated and wrote about parapsychological phenomena.

Emeritus Professor of Psychiatry and Neurobehavioral Sciences at the University of Virginia, and a leading researcher on near-death experiences.

Engineer and inventor (1919-2006) who in later life became interested in psychical research. He was the principal investigator of the 1977 Enfield poltergeist case.  

Edmund Gurney (1847-1888) was a founder member of the Society for Psychical Research, noted for his research on hypnotism, telepathy and apparitions.  

English chartered surveyor and amateur conjuror (1910-1991), author of controversial books attacking deceased psychics and researchers.

Icelandic academic psychologist and psi researcher (1931-2020), who published extensively on topics such as past life memories and survival encounters.