Host Giorgio Tsoukalos opens the series archives to celebrate ALIEN INVESTIGATORS that have been brave enough to ask the question, "Are we alone in the universe?" Could these investigators have uncovered proof of an alien presence on earth?
Genres: Documentary , Mystery , Sci-Fi & Fantasy
Keywords: ancient-aliens-theory , megalith , paranormal-investigation , petroglyph , ufo-conspiracy , latest-episodes , watch-full-episodes-online