Xenu is a figure associated with the doctrines of Scientology.
An ex-Scientologist, Roland Rashleigh-Berry, wrote a "Xenu leaflet" that, according to him, reveals many of the details of Scientology's secret teachings.
The Church of Scientology maintains that viewing the OT III materials (the scripture in which Xenu is mentioned) without proper preparation and supervision is likely to cause death by pneumonia.
See also: Scientology vs. the Internet
wikipedia.org dumped 2003-03-17 with terodump