Kentucky's "sleeping prophet" turns out to be even nuttier than I thought he was:
"Cayce taught that an alien civilization on the planets of Arcturus is one of the most advanced in this galaxy. He described it a "fifth-dimensional civilization that is a prototype of Earth's future". From this, an entire army of spinoff UFO religions devoted to the Arcturians sprouted in the subsequent century, with many post-Cayce wannabe-channelers claiming to be Arcturians themselves, such as Commander Theda."
http://unusualkentucky.blogspot.com/2010/07/edgar-cayce.html