"L Ron wrote that 75 million years ago an intergalactic space alien lord called Xenu kidnapped Thetans to earth, dumped them in volcanoes and blew them up with atomic bombs. Ex-Scientologists have insisted to me that Xenu is part of Scientology. If so, it is a religion that requires its followers not to tell others about its core belief, which is very odd. Critics say that if we all knew about Xenu, then Scientology could not charge people as much as £100,000 to find out about him."