Xenu
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Xenu, also called Xemu, is a figure in the Church of Scientology's secret "Advanced Technology", a sacred and esoteric teaching. According to the "Technology", Xenu was the extraterrestrial ruler of a "Galactic Confederacy" who brought billions of his people to Earth in DC-8-like spacecraft 75 million years ago, stacked them around volcanoes, and killed them with hydrogen bombs. Official Scientology scriptures hold that the thetans of these aliens adhere to humans, causing spiritual harm.
A DC-8 aircraft in 2004. Hubbard described Xenu's spacecraft as looking exactly like DC-8s without "fans" (meaning the jet engines, or turbofans).
The volcano and fireball on the cover of Dianetics refers to the Xenu story.
Xenu as depicted by Panorama
Xenu as depicted in South Park
Operating Thetan
Videos
In Scientology, Operating Thetan (OT) is a state of complete spiritual freedom in which one is a "willing and knowing cause over life, thought, matter, energy, space and time". The Church of Scientology offers eight "levels" of OT, each level costing thousands of US dollars. The OT levels are confidential and not revealed to Scientologists until they reach the third Operating Thetan level. In practice, the objective of these levels is to remove "body thetans" which are "confused, disembodied souls from other planets who have attached themselves to us".
